Autogenerate all web examples from samples

That would make it easier to keep them consistent and to test them
continuously

examples/falling_balls_with_web/build.gradle.kts

@@ -1,6 +1,8 @@
 import org.jetbrains.compose.compose
 import org.jetbrains.compose.desktop.application.dsl.TargetFormat
 
+// This project is autogenerated from ../web/samples/falling_balls_with_web
+// In case you want modify code, please, modify it there. 
 plugins {
     kotlin("multiplatform") version "1.5.21"
     id("org.jetbrains.compose") version "0.5.0-build270"

examples/web-compose-bird/build.gradle.kts

@@ -1,4 +1,6 @@
 // Add compose gradle plugin
+// This project is autogenerated from ../web/samples/web-compose-bird
+// In case you want modify code, please, modify it there. 
 plugins {
     kotlin("multiplatform") version "1.5.21"
     id("org.jetbrains.compose") version "0.5.0-build270"

examples/web-getting-started/build.gradle.kts

@@ -1,3 +1,5 @@
+// This project is autogenerated from ../web/samples/web-getting-started
+// In case you want modify code, please, modify it there. 
 plugins {
     kotlin("multiplatform") version "1.5.21"
     id("org.jetbrains.compose") version "0.5.0-build270"

examples/web-with-react/build.gradle.kts

@@ -1,3 +1,5 @@
+// This project is autogenerated from ../web/samples/web-with-react
+// In case you want modify code, please, modify it there. 
 plugins {
 	kotlin("multiplatform") version "1.5.21"
 	id("org.jetbrains.compose") version "0.5.0-build270"

examples/web_landing/build.gradle.kts

@@ -1,3 +1,5 @@
+// This project is autogenerated from ../web/samples/web_landing
+// In case you want modify code, please, modify it there. 
 plugins {
     kotlin("multiplatform") version "1.5.21"
     id("org.jetbrains.compose") version "0.5.0-build270"

web/build.gradle.kts

@@ -1,3 +1,4 @@
+val COMPOSE_CORE_VERSION: String by project
 val COMPOSE_WEB_VERSION: String by project
 val COMPOSE_REPO_USERNAME: String? by project
 val COMPOSE_REPO_KEY: String? by project
@@ -5,12 +6,62 @@ val COMPOSE_WEB_BUILD_WITH_SAMPLES = project.property("compose.web.buildSamples"
 
 apply<jetbrains.compose.web.gradle.SeleniumDriverPlugin>()
 
+fun Project.isSampleProject() = projectDir.parentFile.name == "samples"
+
+tasks.register("generateExamples") {
+    dependsOn(
+       subprojects.filter { it.isSampleProject() }.map { ":samples:${it.name}:sync" } 
+    )
+}
+
 subprojects {
     apply(plugin = "maven-publish")
 
     group = "org.jetbrains.compose.web"
     version = COMPOSE_WEB_VERSION
 
+    if (isSampleProject()) {
+
+        val buildGradleSpec = copySpec {
+            from("build.gradle.kts") {
+                filter { line -> 
+                    line
+                    .replace(
+                        "plugins {",
+"""// This project is autogenerated from ../web/samples/${project.projectDir.name}
+// In case you want modify code, please, modify it there. 
+plugins {"""
+                    )
+                    .replace(
+                        "id(\"org.jetbrains.compose\")", 
+                        "id(\"org.jetbrains.compose\") version \"$COMPOSE_CORE_VERSION\"", 
+                    )
+                    .replace(
+                        "implementation(project(\":web-core\"))",
+                        "implementation(compose.web.core)"
+                    )
+                    .replace(
+                        "implementation(project(\":web-widgets\"))",
+                        "implementation(compose.web.widgets)"
+                    )
+                }
+            }
+        }
+
+        tasks.register<Sync>("sync") {
+            val targetDir = rootProject.projectDir.resolve("../examples/${project.projectDir.name}").normalize()
+            duplicatesStrategy = DuplicatesStrategy.INCLUDE
+            from(project.projectDir)
+            into(targetDir)
+            exclude("build")
+
+            with(buildGradleSpec)
+            doLast {
+                println("from ${project.projectDir} => $targetDir")
+            }
+        }
+    }
+
     pluginManager.withPlugin("maven-publish") {
         configure<PublishingExtension> {
             repositories {

web/samples/falling_balls_with_web/build.gradle.kts

@@ -0,0 +1,74 @@
+import org.jetbrains.compose.compose
+import org.jetbrains.compose.desktop.application.dsl.TargetFormat
+
+plugins {
+    kotlin("multiplatform") version "1.5.21"
+    id("org.jetbrains.compose")
+}
+
+version = "1.0-SNAPSHOT"
+
+repositories {
+    mavenCentral()
+    maven("https://maven.pkg.jetbrains.space/public/p/compose/dev")
+}
+
+kotlin {
+    jvm()
+    js(IR) {
+        browser()
+        binaries.executable()
+    }
+
+    sourceSets {
+        val commonMain by getting {
+            dependencies {
+                implementation(kotlin("stdlib-common"))
+                implementation(compose.web.widgets)
+                implementation(compose.runtime)
+            }
+        }
+
+        val jvmMain by getting {
+             dependencies {
+                implementation(compose.desktop.currentOs)
+             }
+        }
+
+
+        val commonTest by getting {
+            dependencies {
+                implementation(kotlin("test-common"))
+                implementation(kotlin("test-annotations-common"))
+            }
+        }
+    }
+}
+
+compose.desktop {
+    application {
+        mainClass = "org.jetbrains.compose.common.demo.AppKt"
+
+        nativeDistributions {
+            targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
+            packageName = "ImageViewer"
+            packageVersion = "1.0.0"
+
+            modules("jdk.crypto.ec")
+
+            val iconsRoot = project.file("../common/src/desktopMain/resources/images")
+            macOS {
+                iconFile.set(iconsRoot.resolve("icon-mac.icns"))
+            }
+            windows {
+                iconFile.set(iconsRoot.resolve("icon-windows.ico"))
+                menuGroup = "Compose Examples"
+                // see https://wixtoolset.org/documentation/manual/v3/howtos/general/generate_guids.html
+                upgradeUuid = "18159995-d967-4CD2-8885-77BFA97CFA9F"
+            }
+            linux {
+                iconFile.set(iconsRoot.resolve("icon-linux.png"))
+            }
+        }
+    }
+}

web/samples/falling_balls_with_web/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-all.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

web/samples/falling_balls_with_web/gradlew

@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

web/samples/falling_balls_with_web/gradlew.bat

@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

web/samples/falling_balls_with_web/settings.gradle.kts

@@ -0,0 +1,10 @@
+pluginManagement {
+    repositories {
+        gradlePluginPortal()
+        mavenCentral()
+        maven { url = uri("https://maven.pkg.jetbrains.space/public/p/compose/dev") }
+    }
+
+}
+rootProject.name = "falling_balls_with_web"
+

web/samples/falling_balls_with_web/src/commonMain/kotlin/fallingBalls/Game.kt

@@ -0,0 +1,77 @@
+package org.jetbrains.compose.demo.falling
+
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateListOf
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import org.jetbrains.compose.common.ui.unit.IntSize
+import org.jetbrains.compose.common.core.graphics.Color
+import kotlin.random.Random
+
+private fun Color.Companion.random() =
+    Color((0..255).random(), (0..255).random(), (0..255).random())
+
+abstract class Game {
+    internal var previousTime: Long = Long.MAX_VALUE
+    private var startTime = 0L
+
+    var size by mutableStateOf(IntSize(0, 0))
+
+    var width: Int
+        get() = size.width
+        set(newWidth: Int) {
+            size = IntSize(newWidth, height)
+        }
+
+    var height: Int
+        get() = size.height
+        set(newHeight) {
+            size = IntSize(width, newHeight)
+        }
+
+    var pieces = mutableStateListOf<PieceData>()
+        private set
+
+    var elapsed by mutableStateOf(0L)
+    var score by mutableStateOf(0)
+    var clicked by mutableStateOf(0)
+
+    var started by mutableStateOf(false)
+    var paused by mutableStateOf(false)
+    var finished by mutableStateOf(false)
+
+    var numBlocks by mutableStateOf(5)
+
+    fun isInBoundaries(pieceData: PieceData) = pieceData.position < size.height
+
+    abstract fun now(): Long
+
+    fun togglePause() {
+        paused = !paused
+        previousTime = Long.MAX_VALUE
+    }
+
+    fun start() {
+        previousTime = now()
+        startTime = previousTime
+        clicked = 0
+        started = true
+        finished = false
+        paused = false
+        pieces.clear()
+        repeat(numBlocks) { index ->
+            pieces.add(
+                PieceData(this, index * 1.5f + 5f, Color.random()).also { piece ->
+                    piece.position = Random.nextDouble(0.0, 100.0).toFloat()
+                }
+            )
+        }
+    }
+
+    fun update(nanos: Long) {
+        val dt = (nanos - previousTime).coerceAtLeast(0)
+        previousTime = nanos
+        elapsed = nanos - startTime
+        pieces.forEach { it.update(dt) }
+    }
+}

web/samples/falling_balls_with_web/src/commonMain/kotlin/fallingBalls/Piece.kt

@@ -0,0 +1,29 @@
+package org.jetbrains.compose.demo.falling.views
+
+import androidx.compose.runtime.Composable
+import org.jetbrains.compose.demo.falling.PieceData
+import org.jetbrains.compose.common.ui.Modifier
+import org.jetbrains.compose.common.foundation.layout.Box
+import org.jetbrains.compose.common.ui.unit.dp
+import org.jetbrains.compose.common.ui.unit.Dp
+import org.jetbrains.compose.common.foundation.layout.offset
+import org.jetbrains.compose.common.ui.background
+import org.jetbrains.compose.common.ui.size
+import org.jetbrains.compose.common.foundation.clickable
+import org.jetbrains.compose.common.ui.draw.clip
+import org.jetbrains.compose.common.core.graphics.Color
+import jetbrains.compose.common.shapes.CircleShape
+import org.jetbrains.compose.common.demo.position
+
+@Composable
+fun Piece(index: Int, piece: PieceData) {
+    val boxSize = 40.dp
+    Box(
+        Modifier
+            .position(Dp(boxSize.value * index * 5 / 3), Dp(piece.position))
+            .size(boxSize, boxSize)
+            .background(if (piece.picked) Color.Gray else piece.color)
+            .clickable { piece.pick() }
+            .clip(CircleShape)
+    ) {}
+}

web/samples/falling_balls_with_web/src/commonMain/kotlin/fallingBalls/PieceData.kt

@@ -0,0 +1,32 @@
+package org.jetbrains.compose.demo.falling
+
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.compose.runtime.getValue
+import org.jetbrains.compose.common.core.graphics.Color
+
+data class PieceData(val game: Game, val velocity: Float, val color: Color) {
+    var picked: Boolean by mutableStateOf(false)
+    var position: Float by mutableStateOf(0f)
+
+    private fun Game.pickPiece(piece: PieceData) {
+        score += piece.velocity.toInt()
+        clicked++
+        if (clicked == numBlocks) {
+            finished = true
+        }
+    }
+
+    fun update(dt: Long) {
+        if (picked) return
+        val delta = (dt / 1E8 * velocity).toFloat()
+        position = if (game.isInBoundaries(this)) position + delta else 0f
+    }
+
+    fun pick() {
+        if (!picked && !game.paused) {
+            picked = true
+            game.pickPiece(this)
+        }
+    }
+}

web/samples/falling_balls_with_web/src/commonMain/kotlin/fallingBalls/fallingBalls.kt

@@ -0,0 +1,103 @@
+package org.jetbrains.compose.demo.falling.views
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.withFrameNanos
+import org.jetbrains.compose.demo.falling.Game
+import org.jetbrains.compose.common.material.Text
+import org.jetbrains.compose.common.foundation.layout.Column
+import org.jetbrains.compose.common.material.Slider
+import org.jetbrains.compose.common.foundation.layout.Row
+import org.jetbrains.compose.common.foundation.layout.Box
+import org.jetbrains.compose.common.material.Button
+import org.jetbrains.compose.common.ui.Modifier
+import org.jetbrains.compose.common.ui.unit.em
+import org.jetbrains.compose.common.ui.unit.dp
+import org.jetbrains.compose.common.foundation.layout.offset
+import org.jetbrains.compose.common.foundation.layout.width
+import org.jetbrains.compose.common.ui.layout.onSizeChanged
+import org.jetbrains.compose.common.ui.background
+import org.jetbrains.compose.common.foundation.border
+import org.jetbrains.compose.common.ui.size
+import org.jetbrains.compose.common.core.graphics.Color
+import org.jetbrains.compose.common.foundation.layout.fillMaxHeight
+import org.jetbrains.compose.common.foundation.layout.fillMaxWidth
+
+@Composable
+fun fallingBalls(game: Game) {
+    Column(Modifier.fillMaxWidth().fillMaxHeight(1f)) {
+        Box() {
+            Text(
+                "Catch balls!${if (game.finished) " Game over!" else ""}",
+                size = 1.8f.em,
+                color = Color(218, 120, 91)
+            )
+        }
+        Box() {
+            Text(
+                "Score: ${game.score} Time: ${game.elapsed / 1_000_000} Blocks: ${game.numBlocks}",
+                size = 1.8f.em
+            )
+        }
+        Row() {
+            if (!game.started) {
+                Slider(
+                    value = game.numBlocks / 20f,
+                    onValueChange = { game.numBlocks = (it * 20f).toInt().coerceAtLeast(1) },
+                    modifier = Modifier.width(100.dp)
+                )
+            }
+            Button(
+                Modifier
+                    .border(2.dp, Color(255, 215, 0))
+                    .background(Color.Yellow),
+                onClick = {
+                    game.started = !game.started
+                    if (game.started) {
+                        game.start()
+                    }
+                }
+            ) {
+                Text(if (game.started) "Stop" else "Start", size = 2f.em)
+            }
+            if (game.started) {
+                Button(
+                    Modifier
+                        .offset(10.dp, 0.dp)
+                        .border(2.dp, Color(255, 215, 0))
+                        .background(Color.Yellow),
+                    onClick = {
+                        game.togglePause()
+                    }
+                ) {
+                    Text(if (game.paused) "Resume" else "Pause", size = 2f.em)
+                }
+            }
+        }
+
+        if (game.started) {
+            Box(
+                Modifier
+                    .fillMaxWidth()
+                    .fillMaxHeight(1f)
+                    .size(game.width.dp, game.height.dp)
+                    .onSizeChanged {
+                        game.size = it
+                    }
+            ) {
+                game.pieces.forEachIndexed { index, piece ->
+                    Piece(index, piece)
+                }
+            }
+        }
+
+        LaunchedEffect(Unit) {
+            while (true) {
+                withFrameNanos {
+                    if (game.started && !game.paused && !game.finished)
+                        game.update(it)
+                }
+            }
+        }
+    }
+}

web/samples/falling_balls_with_web/src/commonMain/kotlin/modifiers/position.kt

@@ -0,0 +1,8 @@
+package org.jetbrains.compose.common.demo
+
+import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.Modifier
+import org.jetbrains.compose.common.ui.unit.Dp
+
+@Composable
+expect fun Modifier.position(width: Dp, height: Dp): Modifier

web/samples/falling_balls_with_web/src/jsMain/kotlin/androidx/compose/web/with-web/App.kt

@@ -0,0 +1,30 @@
+package org.jetbrainsc.compose.common.demo
+
+import org.jetbrains.compose.web.renderComposable
+import kotlinx.browser.document
+import org.w3c.dom.HTMLElement
+import org.jetbrains.compose.demo.falling.views.fallingBalls
+import org.jetbrains.compose.demo.falling.Game
+import androidx.compose.runtime.remember
+import kotlinx.browser.window
+import org.jetbrains.compose.web.css.Style
+import org.jetbrains.compose.web.ui.Styles
+
+class JsGame : Game() {
+    override fun now() = window.performance.now().toLong()
+}
+
+fun main() {
+    val root = document.getElementById("root") as HTMLElement
+
+    renderComposable(root = root) {
+        Style(Styles)
+        val game = remember {
+            JsGame().apply {
+              width = root.offsetWidth
+              height = root.offsetHeight
+            }
+        }
+        fallingBalls(game)
+    }
+}

web/samples/falling_balls_with_web/src/jsMain/kotlin/modifiers/position.kt

@@ -0,0 +1,21 @@
+package org.jetbrains.compose.common.demo
+
+import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.Modifier
+import org.jetbrains.compose.common.foundation.layout.offset
+import org.jetbrains.compose.common.ui.unit.Dp
+import org.jetbrains.compose.common.internal.castOrCreate
+import org.jetbrains.compose.web.css.top
+import org.jetbrains.compose.web.css.left
+import org.jetbrains.compose.web.css.px
+import org.jetbrains.compose.web.css.position
+import org.jetbrains.compose.web.css.Position
+
+@Composable
+actual fun Modifier.position(width: Dp, height: Dp): Modifier  = castOrCreate().apply {
+    add {
+        position(Position.Absolute)
+        top(height.value.px)
+        left(width.value.px)
+    }
+}

web/samples/falling_balls_with_web/src/jsMain/resources/index.html

@@ -0,0 +1,29 @@
+<!--
+  ~ Copyright 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>compose-browser-with-web-demo</title>
+    <link type="text/css" rel="stylesheet" href="styles.css" />
+</head>
+<body>
+    <div id="root"></div>
+    <script src="falling_balls_with_web.js">
+    </script>
+</body>
+</html>

web/samples/falling_balls_with_web/src/jsMain/resources/styles.css

@@ -0,0 +1,8 @@
+#root {
+    width: 100%;
+    height: 100vh;
+}
+
+#root > .compose-web-column > div {
+    position: relative;
+}

web/samples/falling_balls_with_web/src/jvmMain/kotlin/App.kt

@@ -0,0 +1,24 @@
+package org.jetbrains.compose.common.demo
+
+import androidx.compose.desktop.Window
+import androidx.compose.ui.unit.IntSize
+import org.jetbrains.compose.demo.falling.views.fallingBalls
+import org.jetbrains.compose.demo.falling.Game
+import androidx.compose.runtime.remember
+
+class JvmGame : Game() {
+    override fun now() = System.nanoTime()
+}
+
+fun main() {
+    Window(title = "Demo", size = IntSize(600, 400)) {
+        fallingBalls(
+            remember {
+                JvmGame().apply {
+                    width = 600
+                    height = 400
+                }
+            }
+        )
+    }
+}

web/samples/falling_balls_with_web/src/jvmMain/kotlin/modifiers/position.kt

@@ -0,0 +1,14 @@
+package org.jetbrains.compose.common.demo
+
+import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.Modifier
+import org.jetbrains.compose.common.foundation.layout.offset
+import org.jetbrains.compose.common.ui.unit.Dp
+import org.jetbrains.compose.common.internal.castOrCreate
+import org.jetbrains.compose.common.ui.unit.implementation
+import androidx.compose.foundation.layout.offset
+
+@Composable
+actual fun Modifier.position(width: Dp, height: Dp): Modifier = castOrCreate().apply {
+    modifier = modifier.offset(width.implementation, height.implementation)
+}

web/samples/web-compose-bird/.gitignore

@@ -0,0 +1,15 @@
+*.iml
+.gradle
+/local.properties
+/.idea
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+build/
+/captures
+.externalNativeBuild
+.cxx

web/samples/web-compose-bird/README.md

@@ -0,0 +1,35 @@
+# 🐦 Compose Bird
+
+![](demo.gif)
+
+![latestVersion](https://img.shields.io/github/v/release/theapache64/compose-bird)
+<a href="https://twitter.com/theapache64" target="_blank">
+<img alt="Twitter: theapache64" src="https://img.shields.io/twitter/follow/theapache64.svg?style=social" />
+</a>
+
+> A flappy bird clone using Compose Web and radio buttons
+
+## ▶️ Play
+
+- https://theapache64.github.io/compose-bird/
+
+## 🏃 Run
+
+```
+./gradlew jsBrowserRun
+```
+
+## 📦 Distribute
+
+```
+./gradlew jsBrowserDistribution // and then open index.html (build/distributions)
+```
+
+## ✍️ Author
+
+👤 **theapache64**
+
+* Twitter: <a href="https://twitter.com/theapache64" target="_blank">@theapache64</a>
+* Email: theapache64@gmail.com
+
+Feel free to ping me 😉

web/samples/web-compose-bird/build.gradle.kts

@@ -0,0 +1,28 @@
+// Add compose gradle plugin
+plugins {
+    kotlin("multiplatform") version "1.5.21"
+    id("org.jetbrains.compose")
+}
+group = "com.theapache64.composebird"
+version = "1.0.0-alpha01"
+
+// Add maven repositories
+repositories {
+    mavenCentral()
+    maven("https://maven.pkg.jetbrains.space/public/p/compose/dev")
+}
+
+kotlin {
+    js(IR) {
+        browser()
+        binaries.executable()
+    }
+    sourceSets {
+        val jsMain by getting {
+            dependencies {
+                implementation(project(":web-core"))
+                implementation(compose.runtime)
+            }
+        }
+    }
+}

web/samples/web-compose-bird/gradle.properties

@@ -0,0 +1,2 @@
+kotlin.code.style=official
+org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=1024m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8

web/samples/web-compose-bird/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.8-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

web/samples/web-compose-bird/gradlew

@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

web/samples/web-compose-bird/gradlew.bat

@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

web/samples/web-compose-bird/settings.gradle.kts

@@ -0,0 +1,8 @@
+pluginManagement {
+    repositories {
+        gradlePluginPortal()
+        maven("https://maven.pkg.jetbrains.space/public/p/compose/dev")
+    }
+}
+rootProject.name = "web-compose-bird"
+

web/samples/web-compose-bird/src/jsMain/kotlin/core/ComposeBirdGame.kt

@@ -0,0 +1,157 @@
+package core
+
+import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.State
+import androidx.compose.runtime.mutableStateOf
+import data.GameFrame
+import data.Tube
+import kotlin.js.Date
+
+/**
+ * Game logic
+ */
+class ComposeBirdGame : Game {
+
+    companion object {
+        const val COLUMNS = 15
+        const val ROWS = 9
+        const val BIRD_COLUMN = 1
+        private const val TUBES_START_FROM = (COLUMNS * 0.75).toInt()
+        const val TOTAL_TUBES = 10
+        private const val TUBE_HORIZONTAL_DISTANCE = 3
+        private const val TUBE_VERTICAL_DISTANCE = 3
+        private const val TUBE_WEIGHT = 500
+        private const val BIRD_WEIGHT = 300
+    }
+
+    private val tubeGapRange = TUBE_VERTICAL_DISTANCE until ROWS
+    private var tubeLastSteppedAt = 0.0
+    private var birdLastSteppedAt = 0.0
+    private var shouldMoveBirdUp = false
+
+    private val _gameFrame: MutableState<GameFrame> by lazy {
+        mutableStateOf(
+            // First frame
+            GameFrame(
+                birdPos = ROWS / 2,
+                tubes = buildLevel(),
+                isGameOver = false,
+                isGameWon = false,
+                score = 0
+            )
+        )
+    }
+
+    /**
+     * To build a random level
+     */
+    private fun buildLevel(): List<Tube> {
+        return mutableListOf<Tube>().apply {
+            var tubesAdded = 0
+            var tubePosition = 0
+            while (tubesAdded < TOTAL_TUBES) {
+                if (tubePosition > TUBES_START_FROM && tubePosition % TUBE_HORIZONTAL_DISTANCE == 0) { // To give space to each tube
+                    add(
+                        Tube(
+                            tubePosition,
+                            buildRandomTube()
+                        )
+                    )
+                    tubesAdded++
+                }
+                tubePosition++
+            }
+        }
+    }
+
+
+    /**
+     * To build a random vertical tube/pipe
+     */
+    private fun buildRandomTube(): List<Boolean> {
+        // creating a full tube
+        val tube = mutableListOf<Boolean>().apply {
+            repeat(ROWS) {
+                add(true)
+            }
+        }
+
+        // Adding gaps in random middle positions to make it two tubes.
+        val gap1 = tubeGapRange.random()
+        repeat(TUBE_VERTICAL_DISTANCE) { index ->
+            tube[gap1 - index] = false
+        }
+
+        return tube
+    }
+
+    override val gameFrame: State<GameFrame> = _gameFrame
+
+    override fun step() {
+        update {
+            val now = Date().getTime()
+
+            // Stepping tube
+            val tubeDiff = now - tubeLastSteppedAt
+            val newTubes = if (tubeDiff > TUBE_WEIGHT) {
+                tubeLastSteppedAt = now
+                tubes.map {
+                    it.copy(position = it.position - 1)
+                }
+            } else {
+                tubes
+            }
+
+            // Stepping bird position
+            val birdDiff = now - birdLastSteppedAt
+            val newBirdPos = when {
+                shouldMoveBirdUp -> {
+                    birdLastSteppedAt = now
+                    shouldMoveBirdUp = false
+                    birdPos - 1 // move up
+                }
+                birdDiff > BIRD_WEIGHT -> {
+                    birdLastSteppedAt = now
+                    birdPos + 1 // move down
+                }
+                else -> {
+                    birdPos
+                }
+            }
+
+            val newScore = newTubes.filter { it.position < BIRD_COLUMN }.size // All passed tube
+            val newIsGameWon = newScore >= TOTAL_TUBES // If all tubes passed
+
+            // Checking if bird gone out
+            val newIsGameOver = if (newBirdPos < 0 || newBirdPos >= ROWS || isCollidedWithTube(newBirdPos, tubes)) {
+                true
+            } else {
+                isGameOver
+            }
+
+            copy(
+                isGameOver = newIsGameOver,
+                tubes = newTubes,
+                birdPos = newBirdPos,
+                score = newScore,
+                isGameWon = newIsGameWon
+            )
+        }
+    }
+
+    /**
+     * To check if the bird collided with the tube (collision-detection)
+     */
+    private fun isCollidedWithTube(newBirdPos: Int, tubes: List<Tube>): Boolean {
+        val birdTube = tubes.find { it.position == BIRD_COLUMN }
+        return birdTube?.coordinates?.get(newBirdPos) ?: false
+    }
+
+    override fun moveBirdUp() {
+        shouldMoveBirdUp = true
+    }
+
+    private inline fun update(func: GameFrame.() -> GameFrame) {
+        _gameFrame.value = _gameFrame.value.func()
+    }
+}

web/samples/web-compose-bird/src/jsMain/kotlin/core/Game.kt

@@ -0,0 +1,13 @@
+package core
+
+import androidx.compose.runtime.State
+import data.GameFrame
+
+/**
+ * A generic game interface
+ */
+interface Game {
+    val gameFrame: State<GameFrame>
+    fun step()
+    fun moveBirdUp()
+}

web/samples/web-compose-bird/src/jsMain/kotlin/data/GameFrame.kt

@@ -0,0 +1,9 @@
+package data
+
+data class GameFrame(
+    val birdPos: Int,
+    val tubes: List<Tube>,
+    val isGameOver: Boolean,
+    val isGameWon : Boolean,
+    val score: Int,
+)

web/samples/web-compose-bird/src/jsMain/kotlin/data/Tube.kt

@@ -0,0 +1,6 @@
+package data
+
+data class Tube(
+    var position: Int,
+    val coordinates: List<Boolean>
+)

web/samples/web-compose-bird/src/jsMain/kotlin/main.kt

@@ -0,0 +1,140 @@
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import core.ComposeBirdGame
+import core.Game
+import data.GameFrame
+import kotlinx.browser.document
+import kotlinx.browser.window
+import kotlinx.coroutines.delay
+import org.jetbrains.compose.web.attributes.InputType
+import org.jetbrains.compose.web.attributes.checked
+import org.jetbrains.compose.web.attributes.disabled
+import org.jetbrains.compose.web.css.marginTop
+import org.jetbrains.compose.web.css.px
+import org.jetbrains.compose.web.dom.*
+import org.jetbrains.compose.web.renderComposable
+import org.w3c.dom.HTMLElement
+import org.w3c.dom.events.KeyboardEvent
+import org.w3c.dom.get
+
+
+fun main() {
+
+    val game: Game = ComposeBirdGame()
+
+    val body = document.getElementsByTagName("body")[0] as HTMLElement
+
+    // Enabling keyboard control
+    body.addEventListener("keyup", {
+        when ((it as KeyboardEvent).keyCode) {
+            38 -> { // Arrow up
+                game.moveBirdUp()
+            }
+        }
+    })
+
+    renderComposable(rootElementId = "root") {
+
+        Div(
+            attrs = {
+                style {
+                    property("text-align", "center")
+                }
+            }
+        ) {
+
+            // The current frame!
+            val gameFrame by game.gameFrame
+
+            // Igniting the game loop
+            LaunchedEffect(Unit) {
+                while (!gameFrame.isGameOver) {
+                    delay(60)
+                    game.step()
+                }
+            }
+
+            Header(gameFrame)
+
+            Div(
+                attrs = {
+                    style {
+                        marginTop(30.px)
+                    }
+                }
+            ) {
+                if (gameFrame.isGameOver || gameFrame.isGameWon) {
+                    GameResult(gameFrame)
+                } else {
+                    // Play area
+                    repeat(ComposeBirdGame.ROWS) { rowIndex ->
+                        Div {
+                            repeat(ComposeBirdGame.COLUMNS) { columnIndex ->
+                                Input(
+                                    InputType.Radio,
+
+                                    attrs = {
+                                        val tube = gameFrame.tubes.find { it.position == columnIndex }
+                                        val isTube = tube?.coordinates?.get(rowIndex) ?: false
+                                        val isBird =
+                                            !isTube && columnIndex == ComposeBirdGame.BIRD_COLUMN && rowIndex == gameFrame.birdPos
+
+                                        if (isTube || isBird) {
+                                            // if it's either a tube node or bird, check it
+                                            checked()
+                                        }
+
+                                        if (!isBird) {
+                                            // if it's a bird, enable it. (to change to blue color)
+                                            disabled()
+                                        }
+
+
+                                    }
+                                )
+                            }
+                        }
+                    }
+                }
+            }
+
+        }
+
+    }
+}
+
+@Composable
+private fun Header(gameFrame: GameFrame) {
+    // Game title
+    H1 {
+        Text(value = "🐦 Compose Bird!")
+    }
+
+    // Game score
+    Text(value = "Your Score: ${gameFrame.score} || Top Score: ${ComposeBirdGame.TOTAL_TUBES}")
+}
+
+@Composable
+private fun GameResult(gameFrame: GameFrame) {
+    // Game Status
+    H2 {
+        if (gameFrame.isGameWon) {
+            Text("🚀 Won the game! 🚀")
+        } else {
+            // core.Game over
+            Text("💀 Game Over 💀")
+        }
+    }
+
+    // Try Again
+    Button(
+        attrs = {
+            onClick {
+                window.location.reload()
+            }
+        }
+    ) {
+        Text("Try Again!")
+    }
+}

web/samples/web-compose-bird/src/jsMain/resources/index.html

@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>compose-bird</title>
+    <style>
+        input[type=radio]{
+            width:25px;
+            height:25px;
+        }
+    </style>
+</head>
+<body>
+<div id="root"></div>
+<script src="web-compose-bird.js"></script>
+</body>
+</html>

web/samples/web-getting-started/.gitignore

@@ -0,0 +1,3 @@
+/.gradle/
+/.idea/
+/build/

web/samples/web-getting-started/README.md

@@ -0,0 +1,4 @@
+### Running web application
+```
+./gradlew jsBrowserRun
+```

web/samples/web-getting-started/build.gradle.kts

@@ -0,0 +1,24 @@
+plugins {
+    kotlin("multiplatform") version "1.5.21"
+    id("org.jetbrains.compose")
+}
+
+repositories {
+    mavenCentral()
+    maven("https://maven.pkg.jetbrains.space/public/p/compose/dev")
+}
+
+kotlin {
+    js(IR) {
+        browser()
+        binaries.executable()
+    }
+    sourceSets {
+        val jsMain by getting {
+            dependencies {
+                implementation(project(":web-core"))
+                implementation(compose.runtime)
+            }
+        }
+    }
+}

web/samples/web-getting-started/gradle.properties

@@ -0,0 +1 @@
+kotlin.code.style=official

web/samples/web-getting-started/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-all.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

web/samples/web-getting-started/gradlew

@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

web/samples/web-getting-started/gradlew.bat

@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

web/samples/web-getting-started/settings.gradle.kts

@@ -0,0 +1,9 @@
+pluginManagement {
+    repositories {
+        gradlePluginPortal()
+        maven("https://maven.pkg.jetbrains.space/public/p/compose/dev")
+    }
+}
+
+rootProject.name = "web-getting-started"
+

web/samples/web-getting-started/src/jsMain/kotlin/Main.kt

@@ -0,0 +1,34 @@
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.setValue
+import org.jetbrains.compose.web.css.padding
+import org.jetbrains.compose.web.css.px
+import org.jetbrains.compose.web.dom.Button
+import org.jetbrains.compose.web.dom.Div
+import org.jetbrains.compose.web.dom.Span
+import org.jetbrains.compose.web.dom.Text
+import org.jetbrains.compose.web.renderComposable
+
+fun main() {
+    var count: Int by mutableStateOf(0)
+
+    renderComposable(rootElementId = "root") {
+        Div({ style { padding(25.px) } }) {
+            Button(attrs = {
+                onClick { count -= 1 }
+            }) {
+                Text("-")
+            }
+
+            Span({style { padding(15.px) }}) {
+                Text("$count")
+            }
+
+            Button({
+                onClick { count += 1 }
+            }) {
+                Text("+")
+            }
+        }
+    }
+}

web/samples/web-getting-started/src/jsMain/resources/index.html

@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Getting Started</title>
+</head>
+<body>
+<div id="root"></div>
+<script src="web-getting-started.js"></script>
+</body>
+</html>

web/samples/web-with-react/.gitignore

@@ -0,0 +1,3 @@
+/.gradle/
+/.idea/
+/build/

web/samples/web-with-react/README.md

@@ -0,0 +1,24 @@
+### Use Compose(web) in React app
+
+[see ComposeInReactApp.kt](src/jsMain/kotlin/ComposeInReactApp.kt)
+
+`useCompose(...)` is a custom React effect to render a content using Compose.
+It's not a part of any library.
+
+### Use React in Compose(web) app
+
+`UseReactEffect(...)` is a custom Compose effect to render a content using React.
+It's not a part of any library.
+
+[see ReactInComposeApp.kt](src/jsMain/kotlin/ReactInComposeApp.kt)
+
+### How to use existing React components:
+
+It requires adding `external` declarations. For example: [ReactYoutubePlayer.kt](src/jsMain/kotlin/ReactYoutubePlayer.kt)
+
+Here is a good tutorial - [Using packages from NPM](https://play.kotlinlang.org/hands-on/Building%20Web%20Applications%20with%20React%20and%20Kotlin%20JS/07_Using_Packages_From_NPM)
+
+### Running web application
+```
+./gradlew jsBrowserRun
+```

web/samples/web-with-react/build.gradle.kts

@@ -0,0 +1,31 @@
+plugins {
+	kotlin("multiplatform") version "1.5.21"
+	id("org.jetbrains.compose")
+}
+
+repositories {
+	mavenCentral()
+	maven("https://maven.pkg.jetbrains.space/public/p/compose/dev")
+	maven("https://maven.pkg.jetbrains.space/kotlin/p/kotlin/kotlin-js-wrappers")
+}
+
+kotlin {
+	js(IR) {
+		browser()
+		binaries.executable()
+	}
+	sourceSets {
+		val jsMain by getting {
+			dependencies {
+				implementation(project(":web-core"))
+				implementation(compose.runtime)
+				implementation("org.jetbrains.kotlin-wrappers:kotlin-react:17.0.2-pre.201-kotlin-1.5.0")
+				implementation("org.jetbrains.kotlin-wrappers:kotlin-react-dom:17.0.2-pre.201-kotlin-1.5.0")
+				implementation("org.jetbrains.kotlin-wrappers:kotlin-styled:5.3.0-pre.201-kotlin-1.5.0")
+				implementation(npm("react", "17.0.2"))
+				implementation(npm("react-dom", "17.0.2"))
+				implementation(npm("react-youtube-lite", "1.0.1"))
+			}
+		}
+	}
+}

web/samples/web-with-react/gradle.properties

@@ -0,0 +1 @@
+kotlin.code.style=official

web/samples/web-with-react/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-all.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

web/samples/web-with-react/gradlew

@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

web/samples/web-with-react/gradlew.bat

@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

web/samples/web-with-react/settings.gradle.kts

@@ -0,0 +1,9 @@
+pluginManagement {
+    repositories {
+        gradlePluginPortal()
+        maven("https://maven.pkg.jetbrains.space/public/p/compose/dev")
+    }
+}
+
+rootProject.name = "web-with-react"
+

web/samples/web-with-react/src/jsMain/kotlin/ComposeInReactApp.kt

@@ -0,0 +1,149 @@
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.State
+import androidx.compose.runtime.mutableStateOf
+import org.jetbrains.compose.web.dom.Div
+import org.jetbrains.compose.web.dom.Text
+import org.jetbrains.compose.web.renderComposable
+import kotlinx.browser.document
+import kotlinx.browser.window
+import kotlinx.css.*
+import kotlinx.html.InputType
+import kotlinx.html.js.onClickFunction
+import kotlinx.html.js.onInputFunction
+import org.w3c.dom.HTMLElement
+import react.*
+import react.dom.*
+import styled.css
+import styled.styledDiv
+
+@Composable
+private fun ComposableComponentToUseInReact(count: State<Int>) {
+    repeat(count.value) {
+        Div {
+            Text("Item $it")
+        }
+    }
+}
+
+/**
+ * @param containerRef - [RMutableRef] - reference to the HTMLElement that is used as a root for Composition
+ * @param stateInitialValue - initial state value for the Composition
+ * @param stateValueProvider - a lambda that's used to change the state's value
+ * @param composable - the content controlled by Compose and mounted in a root provided by [containerRef]
+ */
+private fun <T> useCompose(
+    containerRef: RMutableRef<HTMLElement>,
+    stateInitialValue: T,
+    stateValueProvider: () -> T,
+    composable: @Composable (state: State<T>) -> Unit
+) {
+    val mutableState = useRef(mutableStateOf(stateInitialValue))
+
+    useEffect {
+        mutableState.current?.value = stateValueProvider()
+    }
+
+    useLayoutEffectWithCleanup(dependencies = emptyList()) {
+        val composition = renderComposable(containerRef.current!!) {
+            composable(mutableState.current!!)
+        }
+        return@useLayoutEffectWithCleanup {
+            composition.dispose()
+        }
+    }
+}
+
+private external interface ListProps : RProps {
+    var countOfItems: Int
+}
+
+private val composeListComponentWrapper = functionalComponent<ListProps> { props ->
+    val containerRef = useRef<HTMLElement>(null)
+
+    useCompose(
+        containerRef = containerRef,
+        stateInitialValue = 0,
+        stateValueProvider = { props.countOfItems }
+    ) {
+        ComposableComponentToUseInReact(it)
+    }
+
+    // This div will be a root for the Composition managed by Compose
+    div { ref { containerRef.current = it } }
+}
+
+private val column = functionalComponent<RProps> {
+    val (counter, setCounter) = useState(0)
+
+    styledDiv {
+        css {
+            padding = "25px"
+        }
+
+        h3 {
+            +"Update items count using slider:"
+        }
+
+        input(type = InputType.range) {
+            attrs {
+                onInputFunction = {
+                    setCounter(it.target?.asDynamic().value.toString().toInt())
+                }
+                value = "$counter"
+            }
+        }
+
+        h3 {
+            +"Compose controlled items:"
+        }
+
+        child(composeListComponentWrapper) {
+            this.attrs {
+                countOfItems = counter
+            }
+        }
+    }
+}
+
+private val appContent = functionalComponent<RProps> {
+    val (columnsCount, setColumnsCount) = useState(3)
+
+    a(href = "${window.location.origin}?app=composeApp") {
+        +"GO TO REACT IN COMPOSE EXAMPLE"
+    }
+
+    button {
+        attrs {
+            onClickFunction = {
+                setColumnsCount(columnsCount - 1)
+            }
+        }
+        +"Remove column"
+    }
+
+    button {
+        attrs {
+            onClickFunction = {
+                setColumnsCount(columnsCount + 1)
+            }
+        }
+        +"Add column"
+    }
+
+    styledDiv {
+        css {
+            display = Display.flex
+            flexDirection = FlexDirection.row
+        }
+
+        repeat(columnsCount) {
+            child(column)
+        }
+    }
+}
+
+fun composeInReactAppExample() {
+    render(document.getElementById("root")) {
+        child(appContent)
+    }
+}

web/samples/web-with-react/src/jsMain/kotlin/Main.kt

@@ -0,0 +1,14 @@
+import kotlinx.browser.window
+import org.w3c.dom.url.URLSearchParams
+
+fun main() {
+
+	val urlParams = URLSearchParams(window.location.search)
+
+	val app = urlParams.get("app") ?: "composeApp"
+
+	when (app) {
+		"composeApp" -> reactInComposeAppExample()
+		"reactApp" -> composeInReactAppExample()
+	}
+}

web/samples/web-with-react/src/jsMain/kotlin/ReactInComposeApp.kt

@@ -0,0 +1,94 @@
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import org.jetbrains.compose.web.css.margin
+import org.jetbrains.compose.web.css.percent
+import org.jetbrains.compose.web.css.px
+import org.jetbrains.compose.web.css.width
+import org.jetbrains.compose.web.dom.*
+import org.jetbrains.compose.web.renderComposable
+import kotlinx.browser.window
+import org.w3c.dom.HTMLElement
+import react.RBuilder
+import react.dom.render
+import react.dom.unmountComponentAtNode
+
+/**
+ * @param key - when UseReactEffect is invoked with a new [key], compose forces react to render with a new content.
+ * @param content - the builder for the content managed by React
+ */
+@Composable
+private fun ElementScope<HTMLElement>.UseReactEffect(
+    key: Any?,
+    content: RBuilder.() -> Unit
+) {
+    DomSideEffect(key = key) { htmlElement ->
+        render(htmlElement) {
+            content()
+        }
+    }
+
+    DisposableRefEffect { htmlElement ->
+        onDispose {
+            unmountComponentAtNode(htmlElement)
+        }
+    }
+}
+
+@Composable
+fun YoutubeReactPlayerWrapper(videoUrl: String) {
+    if (videoUrl.isEmpty()) return
+    Div({
+        style {
+            width(50.percent)
+        }
+    }) {
+        UseReactEffect(key = videoUrl) {
+            reactPlayer {
+                attrs.url = videoUrl
+            }
+        }
+    }
+}
+
+private val videos = listOf(
+    "https://www.youtube.com/watch?v=UryyHq45Y_8",
+    "https://www.youtube.com/watch?v=698I_AH8h6s",
+    "https://www.youtube.com/watch?v=F8jj7e-_jFA"
+)
+
+fun reactInComposeAppExample() {
+    var videoUrl by mutableStateOf("")
+
+    renderComposable(rootElementId = "root") {
+
+        A(href = "${window.location.origin}?app=reactApp") { Text("GO TO COMPOSE IN REACT EXAMPLE") }
+
+        Div {
+            videos.forEachIndexed { ix, url ->
+                Button(
+                    attrs = {
+                        onClick { videoUrl = url }
+                        style  {
+                            margin(10.px)
+                        }
+                    }
+                ) { Text("Video ${ix + 1}") }
+            }
+
+            Button(
+                attrs = {
+                    onClick {
+                        videoUrl = ""
+                        style {
+                            margin(10.px)
+                        }
+                    }
+                },
+            ) { Text("Reset") }
+
+            YoutubeReactPlayerWrapper(videoUrl)
+        }
+    }
+}

web/samples/web-with-react/src/jsMain/kotlin/ReactYoutubePlayer.kt

@@ -0,0 +1,11 @@
+@file:JsModule("react-youtube-lite")
+@file:JsNonModule
+
+import react.*
+
+@JsName("ReactYouTubeLite")
+external val reactPlayer: RClass<ReactYouTubeProps>
+
+external interface ReactYouTubeProps : RProps {
+	var url: String
+}

web/samples/web-with-react/src/jsMain/resources/index.html

@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Compose for Web: with react component</title>
+</head>
+<body>
+<div id="root"></div>
+<script src="web-with-react.js"></script>
+</body>
+</html>

web/samples/web_landing/.gitignore

@@ -0,0 +1,15 @@
+*.iml
+.gradle
+/local.properties
+/.idea
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+build/
+/captures
+.externalNativeBuild
+.cxx

web/samples/web_landing/build.gradle.kts

@@ -0,0 +1,26 @@
+plugins {
+    kotlin("multiplatform") version "1.5.21"
+    id("org.jetbrains.compose")
+}
+
+repositories {
+    mavenCentral()
+    maven("https://maven.pkg.jetbrains.space/public/p/compose/dev")
+}
+
+kotlin {
+    js(IR) {
+        browser()
+        binaries.executable()
+    }
+
+    sourceSets {
+        val jsMain by getting {
+            dependencies {
+                implementation(npm("highlight.js", "10.7.2"))
+                implementation(project(":web-core"))
+                implementation(compose.runtime)
+            }
+        }
+    }
+}

web/samples/web_landing/gradle.properties

@@ -0,0 +1 @@
+kotlin.code.style=official

web/samples/web_landing/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-all.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

web/samples/web_landing/gradlew

@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

web/samples/web_landing/gradlew.bat

@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

web/samples/web_landing/license/LICENSE.txt

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
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+
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+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
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+      negligent acts) or agreed to in writing, shall any Contributor be
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+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
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+
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+
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+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

web/samples/web_landing/license/third_party/README.md

@@ -0,0 +1,5 @@
+Following third-party dependencies exist in web_landing:
+
+* highlight.js@10.7.2:
+    * BSD 3-Clause License: [highlight.js](highlightjs.txt) 
+    * https://github.com/highlightjs/highlight.js/blob/main/LICENSE 

web/samples/web_landing/license/third_party/highlightjs.txt

@@ -0,0 +1,29 @@
+BSD 3-Clause License
+
+Copyright (c) 2006, Ivan Sagalaev.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+* Neither the name of the copyright holder nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

web/samples/web_landing/settings.gradle.kts

@@ -0,0 +1,10 @@
+pluginManagement {
+    repositories {
+        gradlePluginPortal()
+        mavenCentral()
+        maven { url = uri("https://maven.pkg.jetbrains.space/public/p/compose/dev") }
+    }
+
+}
+rootProject.name = "compose-web-lp"
+

web/samples/web_landing/src/jsMain/kotlin/com/sample/HighlightJs.kt

@@ -0,0 +1,12 @@
+package com.sample
+
+import org.w3c.dom.HTMLElement
+
+@JsName("hljs")
+@JsModule("highlight.js")
+@JsNonModule
+external class HighlightJs {
+    companion object {
+        fun highlightElement(block: HTMLElement)
+    }
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/Main.kt

@@ -0,0 +1,27 @@
+package com.sample
+
+import org.jetbrains.compose.web.css.Style
+import org.jetbrains.compose.web.renderComposable
+import com.sample.components.*
+import com.sample.content.*
+import com.sample.style.AppStylesheet
+import org.w3c.dom.HTMLElement
+
+
+fun main() {
+    renderComposable(rootElementId = "root") {
+        Style(AppStylesheet)
+
+        Layout {
+            Header()
+            MainContentLayout {
+                Intro()
+                ComposeWebLibraries()
+                GetStarted()
+                CodeSamples()
+                JoinUs()
+            }
+            PageFooter()
+        }
+    }
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/components/Card.kt

@@ -0,0 +1,80 @@
+package com.sample.components
+
+import androidx.compose.runtime.Composable
+import org.jetbrains.compose.web.attributes.ATarget
+import org.jetbrains.compose.web.attributes.target
+import org.jetbrains.compose.web.css.*
+import org.jetbrains.compose.web.dom.*
+import com.sample.style.*
+
+
+data class LinkOnCard(val linkText: String, val linkUrl: String)
+
+@Composable
+private fun CardTitle(title: String, darkTheme: Boolean = false) {
+    H3({
+        classes(WtTexts.wtH3)
+        if (darkTheme) {
+            classes(WtTexts.wtH3ThemeDark)
+        }
+    }) {
+        Text(title)
+    }
+}
+
+@Composable
+private fun CardLink(link: LinkOnCard) {
+    A(
+        attrs = {
+            classes(WtTexts.wtLink, WtOffsets.wtTopOffset24)
+            target(ATarget.Blank)
+        },
+        href = link.linkUrl
+    ) {
+        Text(link.linkText)
+    }
+}
+
+@Composable
+fun Card(
+    title: String,
+    links: List<LinkOnCard>,
+    darkTheme: Boolean = false,
+    wtExtraStyleClasses: List<String> = listOf(WtCols.wtCol6, WtCols.wtColMd6, WtCols.wtColSm12),
+    content: @Composable () -> Unit
+) {
+    Div({
+        classes(WtCards.wtCard, WtOffsets.wtTopOffset24, *wtExtraStyleClasses.toTypedArray())
+        classes(if (darkTheme) WtCards.wtCardThemeDark else WtCards.wtCardThemeLight)
+    }) {
+        Div({
+            classes(WtCards.wtCardSection, WtCards.wtVerticalFlex)
+        }) {
+
+            Div({ classes(WtCards.wtVerticalFlexGrow) }) {
+                CardTitle(title = title, darkTheme = darkTheme)
+                content()
+            }
+
+            links.forEach {
+                CardLink(it)
+            }
+        }
+    }
+}
+
+@Composable
+fun CardDark(
+    title: String,
+    links: List<LinkOnCard>,
+    wtExtraStyleClasses: List<String> = listOf(WtCols.wtCol6, WtCols.wtColMd6, WtCols.wtColSm12),
+    content: @Composable () -> Unit
+) {
+    Card(
+        title = title,
+        links = links,
+        darkTheme = true,
+        wtExtraStyleClasses = wtExtraStyleClasses,
+        content = content
+    )
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/components/Layout.kt

@@ -0,0 +1,54 @@
+package com.sample.components
+
+import androidx.compose.runtime.Composable
+import org.jetbrains.compose.web.css.*
+import org.jetbrains.compose.web.dom.Div
+import org.jetbrains.compose.web.dom.Main
+import org.jetbrains.compose.web.dom.Section
+import com.sample.style.WtContainer
+import com.sample.style.WtOffsets
+import com.sample.style.WtSections
+
+@Composable
+fun Layout(content: @Composable () -> Unit) {
+    Div({
+        style {
+            display(DisplayStyle.Flex)
+            flexDirection(FlexDirection.Column)
+            height(100.percent)
+            margin(0.px)
+            property("box-sizing", "border-box")
+        }
+    }) {
+        content()
+    }
+}
+
+@Composable
+fun MainContentLayout(content: @Composable () -> Unit) {
+    Main({
+        style {
+            property("flex", "1 0 auto")
+            property("box-sizing", "border-box")
+        }
+    }) {
+        content()
+    }
+}
+
+@Composable
+fun ContainerInSection(sectionThemeStyleClass: String? = null, content: @Composable () -> Unit) {
+    Section({
+        if (sectionThemeStyleClass != null) {
+            classes(WtSections.wtSection, sectionThemeStyleClass)
+        } else {
+            classes(WtSections.wtSection)
+        }
+    }) {
+        Div({
+            classes(WtContainer.wtContainer, WtOffsets.wtTopOffset96)
+        }) {
+            content()
+        }
+    }
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/content/AboutComposeWebLibsSection.kt

@@ -0,0 +1,96 @@
+package com.sample.content
+
+import androidx.compose.runtime.Composable
+import org.jetbrains.compose.web.css.px
+import org.jetbrains.compose.web.css.value
+import org.jetbrains.compose.web.dom.*
+import com.sample.components.Card
+import com.sample.components.ContainerInSection
+import com.sample.components.LinkOnCard
+import com.sample.style.*
+
+data class CardWithListPresentation(
+    val title: String,
+    val list: List<String>,
+    val links: List<LinkOnCard> = emptyList()
+)
+
+private fun createAboutComposeWebCards(): List<CardWithListPresentation> {
+    return listOf(
+        CardWithListPresentation(
+            title = "Composable DOM API",
+            list = listOf(
+                "Express your design and layout in terms of DOM elements and HTML tags",
+                "Use a type-safe HTML DSL to build your UI representation",
+                "Get full control over the look and feel of your application by creating stylesheets with a typesafe CSS DSL",
+                "Integrate with other JavaScript libraries via DOM subtrees"
+            )
+        ),
+        CardWithListPresentation(
+            title = "Multiplatform Widgets With Web Support",
+            list = listOf(
+                "Use and build Compose widgets that work on Android, Desktop, and Web by utilizing Kotlin's expect-actual mechanisms to provide platform-specific implementations",
+                "Experiment with a set of layout primitives and APIs that mimic the features you already know from Compose for Desktop and Android"
+            )
+        )
+    )
+}
+
+@Composable
+fun ComposeWebLibraries() {
+    ContainerInSection(WtSections.wtSectionBgGrayLight) {
+        H2(attrs = { classes(WtTexts.wtH2) }) {
+            Text("Building user interfaces with Compose for Web")
+        }
+
+        Div(attrs = {
+            classes(WtRows.wtRow, WtRows.wtRowSizeM)
+        }) {
+            Div(attrs = {
+                classes(WtCols.wtCol6, WtCols.wtColMd6, WtCols.wtColSm12, WtOffsets.wtTopOffset24)
+            }) {
+                P(attrs = {
+                    classes(WtTexts.wtText1)
+                }) {
+                    Text("Compose for Web allows you to build reactive user interfaces for the web in Kotlin, using the concepts and APIs of Jetpack Compose to express the state, behavior, and logic of your application.")
+                }
+            }
+
+            Div(attrs = {
+                classes(WtCols.wtCol6, WtCols.wtColMd6, WtCols.wtColSm12, WtOffsets.wtTopOffset24)
+            }) {
+                P(attrs = {
+                    classes(WtTexts.wtText1)
+                }) {
+                    Text("Compose for Web provides multiple ways of declaring user interfaces in Kotlin code, allowing you to have full control over your website layout with a declarative DOM API, or use versions of the widgets you already know from Jetpack Compose for Desktop and Android.\n")
+                }
+            }
+        }
+
+        Div(attrs = {
+            classes(WtRows.wtRow, WtRows.wtRowSizeM, WtOffsets.wtTopOffset48)
+        }) {
+            createAboutComposeWebCards().forEach { CardWithList(it) }
+        }
+    }
+}
+
+@Composable
+private fun CardWithList(card: CardWithListPresentation) {
+    Card(
+        title = card.title,
+        links = card.links
+    ) {
+        Ul(attrs = {
+            classes(WtTexts.wtText2)
+        }) {
+            card.list.forEachIndexed { _, it ->
+                Li({
+                    style {
+                        property("padding-top", 24.px)
+                    }
+                }) { Text(it) }
+            }
+        }
+    }
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/content/CodeSamplesSwitcher.kt

@@ -0,0 +1,90 @@
+package com.sample.content
+
+import androidx.compose.runtime.Composable
+import org.jetbrains.compose.web.attributes.InputType
+import org.jetbrains.compose.web.attributes.checked
+import org.jetbrains.compose.web.attributes.name
+import org.jetbrains.compose.web.css.*
+import org.jetbrains.compose.web.css.selectors.CSSSelector
+import org.jetbrains.compose.web.css.selectors.descendant
+import org.jetbrains.compose.web.css.selectors.selector
+import org.jetbrains.compose.web.dom.Form
+import org.jetbrains.compose.web.dom.Input
+import org.jetbrains.compose.web.dom.Label
+import org.jetbrains.compose.web.dom.Text
+import com.sample.style.AppStylesheet
+import org.jetbrains.compose.web.attributes.value
+
+private object SwitcherVariables {
+    val labelWidth by variable<CSSpxValue>()
+    val labelPadding by variable<CSSpxValue>()
+}
+
+object SwitcherStylesheet : StyleSheet(AppStylesheet) {
+    val boxed by style {
+
+        media(mediaMaxWidth(640.px)) {
+            self style {
+                SwitcherVariables.labelWidth(48.px)
+                SwitcherVariables.labelPadding(5.px)
+            }
+        }
+
+        descendant(self, CSSSelector.Type("label")) style {
+            display(DisplayStyle.InlineBlock)
+            property("width", SwitcherVariables.labelWidth.value(56.px))
+            property("padding", SwitcherVariables.labelPadding.value(10.px))
+            property("transition", "all 0.3s")
+            property("text-align", "center")
+            property("box-sizing", "border-box")
+
+            border {
+                style(LineStyle.Solid)
+                width(3.px)
+                color(Color("transparent"))
+                borderRadius(20.px, 20.px, 20.px)
+            }
+            color(Color("#aaa"))
+        }
+
+        border {
+            style(LineStyle.Solid)
+            width(1.px)
+            color(Color("#aaa"))
+            padding(0.px)
+            borderRadius(22.px, 22.px, 22.px)
+        }
+
+        descendant(self, selector("input[type=\"radio\"]")) style {
+            display(DisplayStyle.None)
+        }
+
+        descendant(self, selector("input[type=\"radio\"]:checked + label")) style {
+            border {
+                style(LineStyle.Solid)
+                width(3.px)
+                color(Color("#167dff"))
+                borderRadius(20.px, 20.px, 20.px)
+            }
+            color(Color("#000"))
+        }
+    }
+}
+
+@Composable
+fun CodeSampleSwitcher(count: Int, current: Int, onSelect: (Int) -> Unit) {
+    Form(attrs = {
+        classes(SwitcherStylesheet.boxed)
+    }) {
+        repeat(count) { ix ->
+            Input(type = InputType.Radio, attrs = {
+                name("code-snippet")
+                value("snippet$ix")
+                id("snippet$ix")
+                if (current == ix) checked()
+                onChange { onSelect(ix) }
+            })
+            Label(forId = "snippet$ix") { Text("${ix + 1}") }
+        }
+    }
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/content/CodeSnippets.kt

@@ -0,0 +1,276 @@
+package com.sample.content
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.setValue
+import androidx.compose.runtime.mutableStateOf
+import org.jetbrains.compose.web.css.*
+import org.jetbrains.compose.web.dom.*
+import com.sample.HighlightJs
+import com.sample.components.ContainerInSection
+import com.sample.style.*
+import org.jetbrains.compose.web.css.keywords.auto
+import org.w3c.dom.HTMLElement
+
+private fun HTMLElement.setHighlightedCode(code: String) {
+    innerText = code
+    HighlightJs.highlightElement(this)
+}
+
+private val SimpleCounterSnippet = CodeSnippetData(
+    title = "Simple Counter using Composable DOM",
+    source = """
+        fun main() {
+            val count = mutableStateOf(0)
+            
+            renderComposable(rootElementId = "root") {
+                Button(attrs = {
+                    onClick { count.value = count.value - 1 }
+                }) {
+                    Text("-")
+                }
+                Span(attrs = { style { padding(15.px) }}) { /* we use inline style here */
+                    Text("${"$"}{count.value}")
+                }
+                Button(attrs = {
+                    onClick { count.value = count.value + 1 }
+                }) {
+                    Text("+")
+                }
+            }
+        }
+    """.trimIndent()
+)
+
+private val DeclareAndUseStylesheet = CodeSnippetData(
+    title = "Declare and use a stylesheet",
+    source = """
+        object MyStyleSheet : StyleSheet() {
+            val container by style { /* define a class `container` */
+                border(1.px, LineStyle.Solid, Color.RGB(255, 0, 0))
+            }
+        }
+        
+        @Composable
+        fun MyComponent() {
+            Div(attrs = {
+                classes(MyStyleSheet.container) /* use `container` class */
+            }) {
+                Text("Hello world!")
+            }
+        }
+        
+        fun main() {
+            renderComposable(rootElementId = "root") {
+                Style(MyStyleSheet) /* mount the stylesheet */
+                MyComponent()
+            }
+        }
+    """.trimIndent()
+)
+
+private val DeclareAndUseCssVariable = CodeSnippetData(
+    title = "Declare and use CSS variables",
+    source = """
+        object MyVariables : CSSVariables {
+            val contentBackgroundColor by variable<Color>() /* declare a variable */
+        }
+        
+        object MyStyleSheet: StyleSheet() {
+            val container by style {
+                MyVariables.contentBackgroundColor(Color("blue")) /* set its value */
+            }
+            val content by style {
+                backgroundColor(MyVariables.contentBackgroundColor.value()) /* use it */
+            }
+        }
+        
+        @Composable
+        fun MyComponent() {
+            Div(attrs = {
+                classes(MyStyleSheet.container)
+            }) {
+                Span(attrs = {
+                    classes(MyStyleSheet.content)
+                }) {
+                    Text("Hello world!")
+                }
+            }
+        }
+    """.trimIndent()
+)
+
+private val HoverSelectorAndMedia = CodeSnippetData(
+    title = "Hover selector and media query examples",
+    source = """
+        object MyStyleSheet: StyleSheet() {
+            val container by style {
+            
+                backgroundColor(Color("blue"))
+            
+                padding(20.px)
+                
+                hover(self) style { /* `self` is a reference to the class */
+                    backgroundColor(Color("red"))
+                }
+                
+                media(maxWidth(500.px)) {
+                    self style {
+                        padding(10.px)
+                    }
+                }
+            }
+        }
+    """.trimIndent()
+)
+
+private val DefineCssClassInComponent = CodeSnippetData(
+    title = "Define a CSS class in a component",
+    source = """
+        object MyStyleSheet: StyleSheet() {}
+
+        @Composable
+        fun MyComponent() {
+            Div(attrs = {
+                /* the class name will be generated at runtime */
+                classes(MyStyleSheet.css { 
+                
+                    backgroundColor(Color("blue"))
+                    
+                    self + ":hover" style { /* this is an example of a raw selector */
+                        backgroundColor(Color("red"))
+                    }
+                })
+            }) {
+                Text("Hello world!")
+            }
+        }
+    """.trimIndent()
+)
+
+private val LayoutsSample = CodeSnippetData(
+    title = "Counter for Web and Desktop",
+    source = """
+        /* Shared code in commonMain - App.kt (No direct control over DOM or CSS here) */
+        
+        private val counter = mutableStateOf(0)
+
+        @Composable
+        fun App() {
+            Row {
+                Button(onClick = { counter.value = counter.value - 1 }) {
+                    Text("-")
+                }
+        
+                Text("${"$"}{counter.value}", modifier = Modifier.padding(16.dp))
+        
+                Button(onClick = { counter.value = counter.value + 1 }) {
+                    Text("+")
+                }
+            }
+        }
+        
+        /* Desktop specific code in desktopMain: */
+        
+        fun main() = Window(title = "Demo", size = IntSize(800, 800)) {
+            App()
+        }
+        
+        /* Web specific code in jsMain: */
+        
+        fun main() = renderComposable(rootElementId = "root") { 
+            App() 
+        }
+    """.trimIndent()
+)
+
+private val allSnippets = arrayOf(
+    SimpleCounterSnippet,
+    DeclareAndUseStylesheet,
+    DeclareAndUseCssVariable,
+    HoverSelectorAndMedia,
+    DefineCssClassInComponent,
+    LayoutsSample
+)
+
+private var currentCodeSnippet: CodeSnippetData by mutableStateOf(allSnippets[0])
+private var selectedSnippetIx: Int by mutableStateOf(0)
+
+@Composable
+fun CodeSamples() {
+    ContainerInSection {
+        Div({
+            classes(WtRows.wtRow)
+            style {
+                justifyContent(JustifyContent.SpaceBetween)
+            }
+        }) {
+            Div({ classes(WtCols.wtCol6, WtCols.wtColMd4, WtCols.wtColSm12) }) {
+                H1({
+                    classes(WtTexts.wtH2)
+                }) {
+                    Text("Code samples")
+                }
+            }
+
+            Div({ classes(WtOffsets.wtTopOffsetSm24) }) {
+                CodeSampleSwitcher(count = allSnippets.size, current = selectedSnippetIx) {
+                    selectedSnippetIx = it
+                    currentCodeSnippet = allSnippets[it]
+                }
+            }
+        }
+
+        TitledCodeSample(title = currentCodeSnippet.title, code = currentCodeSnippet.source)
+    }
+}
+
+@Composable
+private fun TitledCodeSample(title: String, code: String) {
+    H3({
+        classes(WtTexts.wtH3, WtOffsets.wtTopOffset48)
+    }) {
+        Text(title)
+    }
+
+    Div({
+        classes(WtOffsets.wtTopOffset24)
+        style {
+            backgroundColor(rgba(39, 40, 44, 0.05))
+            borderRadius(8.px, 8.px, 8.px)
+            property("padding", "12px 16px")
+        }
+    }) {
+        FormattedCodeSnippet(code = code)
+    }
+}
+
+@Composable
+fun FormattedCodeSnippet(code: String, language: String = "kotlin") {
+    Pre({
+        style {
+            property("max-height", 25.em)
+            property("overflow", "auto")
+            height(auto)
+        }
+    }) {
+        Code({
+            classes("language-$language", "hljs")
+            style {
+                property("font-family", "'JetBrains Mono', monospace")
+                property("tab-size", 4)
+                fontSize(10.pt)
+                backgroundColor(Color("transparent"))
+            }
+        }) {
+            DomSideEffect(code) {
+                it.setHighlightedCode(code)
+            }
+        }
+    }
+}
+
+private data class CodeSnippetData(
+    val title: String,
+    val source: String
+)

web/samples/web_landing/src/jsMain/kotlin/com/sample/content/Footer.kt

@@ -0,0 +1,113 @@
+package com.sample.content
+
+import androidx.compose.runtime.Composable
+import org.jetbrains.compose.web.attributes.ATarget
+import org.jetbrains.compose.web.attributes.target
+import org.jetbrains.compose.web.css.*
+import org.jetbrains.compose.web.dom.*
+import com.sample.style.*
+
+
+@Composable
+fun PageFooter() {
+    Footer({
+        style {
+            flexShrink(0)
+            property("box-sizing", "border-box")
+        }
+    }) {
+        Section({
+            classes(WtSections.wtSectionBgGrayDark)
+            style {
+                property("padding", "24px 0")
+            }
+        }) {
+            Div({ classes(WtContainer.wtContainer) }) {
+                Div({
+                    classes(WtRows.wtRow, WtRows.wtRowSizeM, WtRows.wtRowSmAlignItemsCenter)
+                    style {
+                        justifyContent(JustifyContent.Center)
+                        flexWrap(FlexWrap.Wrap)
+                    }
+                }) {
+
+                    Div({
+                        classes(WtCols.wtColInline)
+                    }) {
+                        P({
+                            classes(WtTexts.wtText1, WtTexts.wtText1ThemeDark)
+                        }) {
+                            Text("Follow us")
+                        }
+                    }
+
+                    Div({
+                        classes(WtCols.wtColInline)
+                    }) {
+                        getSocialLinks().forEach { SocialIconLink(it) }
+                    }
+                }
+
+                CopyrightInFooter()
+            }
+        }
+    }
+}
+
+@Composable
+private fun CopyrightInFooter() {
+    Div({
+        classes(WtRows.wtRow, WtRows.wtRowSizeM, WtRows.wtRowSmAlignItemsCenter, WtOffsets.wtTopOffset48)
+        style {
+            justifyContent(JustifyContent.SpaceEvenly)
+            flexWrap(FlexWrap.Wrap)
+            property("padding", "0px 12px")
+        }
+    }) {
+        Span({
+            classes(WtTexts.wtText3, WtTexts.wtTextPale)
+        }) {
+            Text("Copyright © 2000-2021  JetBrains s.r.o.")
+        }
+
+        Span({
+            classes(WtTexts.wtText3, WtTexts.wtTextPale)
+        }) {
+            Text("Developed with drive and IntelliJ IDEA")
+        }
+    }
+}
+
+@Composable
+private fun SocialIconLink(link: SocialLink) {
+    A(attrs = {
+        classes(WtTexts.wtSocialButtonItem)
+        target(ATarget.Blank)
+    }, href = link.url) {
+        Img(src = link.iconSvg) {}
+    }
+}
+
+private data class SocialLink(
+    val id: String,
+    val url: String,
+    val title: String,
+    val iconSvg: String
+)
+
+private fun getSocialLinks(): List<SocialLink> {
+    return listOf(
+        SocialLink("facebook", "https://www.facebook.com/JetBrains", "JetBrains on Facebook", "ic_fb.svg"),
+        SocialLink("twitter", "https://twitter.com/jetbrains", "JetBrains on Twitter", "ic_twitter.svg"),
+        SocialLink(
+            "linkedin",
+            "https://www.linkedin.com/company/jetbrains",
+            "JetBrains on Linkedin",
+            "ic_linkedin.svg"
+        ),
+        SocialLink("youtube", "https://www.youtube.com/user/JetBrainsTV", "JetBrains on YouTube", "ic_youtube.svg"),
+        SocialLink("instagram", "https://www.instagram.com/jetbrains/", "JetBrains on Instagram", "ic_insta.svg"),
+        SocialLink("blog", "https://blog.jetbrains.com/", "JetBrains blog", "ic_jb_blog.svg"),
+        SocialLink("rss", "https://blog.jetbrains.com/feed/", "JetBrains RSS Feed", "ic_feed.svg"),
+    )
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/content/GetStartedSection.kt

@@ -0,0 +1,107 @@
+package com.sample.content
+
+import androidx.compose.runtime.Composable
+import org.jetbrains.compose.web.css.*
+import org.jetbrains.compose.web.dom.*
+import com.sample.components.CardDark
+import com.sample.components.ContainerInSection
+import com.sample.components.LinkOnCard
+import com.sample.style.*
+
+private data class GetStartedCardPresentation(
+    val title: String,
+    val content: String,
+    val links: List<LinkOnCard>
+)
+
+private fun getCards(): List<GetStartedCardPresentation> {
+    return listOf(
+        GetStartedCardPresentation(
+            title = "Start tutorial here",
+            content = "In this tutorial we will see how to create our first web UI application using Compose for Web.",
+            links = listOf(
+                LinkOnCard(
+                    linkText = "View tutorial",
+                    linkUrl = "https://github.com/JetBrains/compose-jb/tree/master/tutorials/Web/Getting_Started"
+                )
+            )
+        ),
+        GetStartedCardPresentation(
+            title = "Landing page example",
+            content = "An example of a landing page built using the Composable DOM API and Stylesheet DSL.",
+            links = listOf(
+                LinkOnCard(
+                    linkText = "Explore the source code",
+                    linkUrl = "https://github.com/JetBrains/compose-jb/tree/master/examples/web_landing"
+                )
+            )
+        ),
+        GetStartedCardPresentation(
+            title = "Falling Balls app example",
+            content = "This example demonstrates the use of multiplatform widgets – sharing user interface code between Compose for Desktop and Web.",
+            links = listOf(
+                LinkOnCard(
+                    linkText = "Explore the source code",
+                    linkUrl = "https://github.com/JetBrains/compose-jb/tree/master/examples/falling_balls_with_web"
+                ),
+                LinkOnCard(
+                    linkText = "Play",
+                    linkUrl = "https://falling-balls.ui.pages.jetbrains.team/"
+                )
+            )
+        )
+    )
+}
+
+@Composable
+private fun CardContent(text: String) {
+    P(attrs = {
+        classes(WtTexts.wtText2, WtTexts.wtText2ThemeDark, WtOffsets.wtTopOffset24)
+    }) {
+        Text(text)
+    }
+}
+
+@Composable
+fun GetStarted() {
+    ContainerInSection(WtSections.wtSectionBgGrayDark) {
+        H1(attrs = {
+            classes(WtTexts.wtH2, WtTexts.wtH2ThemeDark)
+        }) {
+            Text("Try out the Compose for Web")
+        }
+
+        Div(attrs = {
+            classes(WtRows.wtRowSizeM, WtRows.wtRow, WtOffsets.wtTopOffset24)
+        }) {
+            Div(attrs = {
+                classes(WtCols.wtCol6, WtCols.wtColMd10, WtCols.wtColSm12, WtOffsets.wtTopOffset24)
+            }) {
+                P(attrs = {
+                    classes(WtTexts.wtText1)
+                    style  {
+                        color(Color("#fff"))
+                    }
+                }) {
+                    Text("Ready for your next adventure? Learn how to build reactive user interfaces with Compose for Web.")
+                }
+            }
+        }
+
+        Div(
+            attrs = {
+                classes(WtRows.wtRow, WtRows.wtRowSizeM, WtOffsets.wtTopOffset24)
+            }
+        ) {
+            getCards().forEach {
+                CardDark(
+                    title = it.title,
+                    links = it.links,
+                    wtExtraStyleClasses = listOf(WtCols.wtCol4, WtCols.wtColMd6, WtCols.wtColSm12)
+                ) {
+                    CardContent(it.content)
+                }
+            }
+        }
+    }
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/content/Header.kt

@@ -0,0 +1,59 @@
+package com.sample.content
+
+import androidx.compose.runtime.Composable
+import org.jetbrains.compose.web.attributes.ATarget
+import org.jetbrains.compose.web.attributes.target
+import org.jetbrains.compose.web.css.*
+import org.jetbrains.compose.web.dom.*
+import com.sample.style.*
+import kotlinx.browser.window
+
+@Composable
+fun Header() {
+    Section(attrs = {
+        classes(WtSections.wtSectionBgGrayDark)
+    }) {
+        Div({ classes(WtContainer.wtContainer) }) {
+            Div({
+                classes(WtRows.wtRow, WtRows.wtRowSizeM)
+            }) {
+                Logo()
+                // TODO: support i18n
+                //LanguageButton()
+            }
+        }
+    }
+}
+
+@Composable
+private fun Logo() {
+    Div(attrs = {
+        classes(WtCols.wtColInline)
+    }) {
+        A(attrs = {
+            target(ATarget.Blank)
+        }, href = "https://www.jetbrains.com/") {
+            Div(attrs = {
+                classes("jetbrains-logo", "_logo-jetbrains-square", "_size-3")
+            }) {}
+        }
+    }
+}
+
+@Composable
+private fun LanguageButton() {
+    Div(attrs = {
+        classes(WtCols.wtColInline)
+    }) {
+        Button(attrs = {
+            classes(WtTexts.wtButton, WtTexts.wtLangButton)
+            onClick { window.alert("Oops! This feature is yet to be implemented") }
+        }) {
+            Img(src = "ic_lang.svg", attrs = { style {
+                property("padding-left", 8.px)
+                property("padding-right", 8.px)
+            }})
+            Text("English")
+        }
+    }
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/content/IntroSection.kt

@@ -0,0 +1,223 @@
+package com.sample.content
+
+import androidx.compose.runtime.*
+import org.jetbrains.compose.web.attributes.ATarget
+import org.jetbrains.compose.web.attributes.AttrsBuilder
+import org.jetbrains.compose.web.attributes.target
+import org.jetbrains.compose.web.css.*
+import org.jetbrains.compose.web.dom.*
+import com.sample.components.ContainerInSection
+import com.sample.style.*
+import org.w3c.dom.HTMLElement
+
+@Composable
+fun Intro() {
+    ContainerInSection {
+        Div({
+            classes(WtRows.wtRow, WtRows.wtRowSizeM, WtRows.wtRowSmAlignItemsCenter)
+        }) {
+
+            Div({
+                classes(WtCols.wtCol2, WtCols.wtColMd3)
+                style {
+                    alignSelf(AlignSelf.Start)
+                }
+            }) {
+                Img(src = "i1.svg", attrs = { classes(AppStylesheet.composeLogo) })
+            }
+
+            Div({
+                classes(
+                    WtCols.wtCol10,
+                    WtCols.wtColMd8,
+                    WtCols.wtColSm12,
+                    WtOffsets.wtTopOffsetSm12
+                )
+            }) {
+                H1(attrs = { classes(WtTexts.wtHero) }) {
+                    Text("Compose for ")
+                    Span({
+                        classes(WtTexts.wtHero)
+                        style {
+                            display(DisplayStyle.InlineBlock)
+                            property("white-space", "nowrap")
+                        }
+                    }) {
+                        Text("Web")
+
+                        Span(attrs = { classes(AppStylesheet.composeTitleTag) }) {
+                            Text("Technology preview")
+                        }
+                    }
+                }
+                Div({
+                    classes(WtDisplay.wtDisplayMdNone)
+                }) {
+                    IntroAboutComposeWeb()
+                }
+            }
+        }
+
+
+        Div(attrs = {
+            classes(WtDisplay.wtDisplayNone, WtDisplay.wtDisplayMdBlock)
+        }) {
+            IntroAboutComposeWeb()
+        }
+    }
+}
+
+@Composable
+private fun IntroAboutComposeWeb() {
+    Div({
+        classes(WtRows.wtRow, WtRows.wtRowSizeM)
+    }) {
+
+        Div({
+            classes(WtCols.wtCol9, WtCols.wtColMd9, WtCols.wtColSm12)
+        }) {
+            P({ classes(WtTexts.wtSubtitle2, WtOffsets.wtTopOffset24) }) {
+                Text("Reactive web UIs for Kotlin, based on Google's ")
+
+                A(href = "https://developer.android.com/jetpack/compose", attrs = {
+                    classes(WtTexts.wtLink)
+                    target(ATarget.Blank)
+                }) {
+                    Text("modern toolkit")
+                }
+
+                Text(" and brought to you by JetBrains")
+            }
+
+            P({
+                classes(WtTexts.wtText1, WtOffsets.wtTopOffset24)
+            }) {
+            Text(
+                "Compose for Web simplifies and accelerates UI development for web applications, " +
+                        "and aims to enable UI code sharing between web, desktop, and Android applications " +
+                        "in the future. Currently in technology preview."
+            )
+        }
+
+            ComposeWebStatusMessage()
+
+            IntroCodeSample()
+
+            A(
+                attrs = {
+                    classes(WtTexts.wtButton, WtOffsets.wtTopOffset24)
+                    target(ATarget.Blank)
+                },
+                href = "https://github.com/jetbrains/compose-jb"
+            ) {
+                Text("Explore on GitHub")
+            }
+        }
+    }
+}
+
+@Composable
+private fun IntroCodeSample() {
+    Div({
+        style {
+            marginTop(24.px)
+            backgroundColor(rgba(39, 40, 44, 0.05))
+            borderRadius(8.px)
+            property("font-family", "'JetBrains Mono', monospace")
+        }
+    }) {
+        Div({
+            style {
+                property("padding", "12px 16px")
+            }
+        }) {
+            FormattedCodeSnippet(
+                code = """
+                fun greet() = listOf("Hello", "Hallo", "Hola", "Servus").random()
+
+                renderComposable("greetingContainer") {
+                    var greeting by remember { mutableStateOf(greet()) }
+                    Button(attrs = { onClick { greeting = greet() } }) {
+                        Text(greeting)
+                    }
+                } 
+            """.trimIndent()
+            )
+        }
+
+        Hr({
+            style {
+                height(1.px)
+                border(width = 0.px)
+                backgroundColor(rgba(39, 40, 44, 0.15))
+            }
+        })
+
+        IntroCodeSampleResult()
+    }
+}
+
+@Composable
+private fun IntroCodeSampleResult() {
+    Div({
+        style {
+            property("padding", "12px 16px")
+            display(DisplayStyle.Flex)
+            flexDirection(FlexDirection.Row)
+            alignItems(AlignItems.Center)
+        }
+    }) {
+        Span({
+            classes(WtTexts.wtText2)
+            style {
+                property("margin-right", 8.px)
+            }
+        }) {
+            Text("Result:")
+        }
+
+        fun greet() = listOf("Hello", "Hallo", "Hola", "Servus").random()
+
+        Div({
+            id("greetingContainer")
+        }) {
+            var greeting by remember { mutableStateOf(greet()) }
+            Button(attrs = { onClick { greeting = greet() } }) {
+                Text(greeting)
+            }
+        }
+    }
+}
+
+@Composable
+private fun ComposeWebStatusMessage() {
+    Div({
+        classes(WtRows.wtRow, WtRows.wtRowSizeXs, WtOffsets.wtTopOffset24)
+    }) {
+        Div({
+            classes(WtCols.wtColInline)
+        }) {
+            Img(src = "ic_info.svg", attrs = {
+                style {
+                    width(24.px)
+                    height(24.px)
+                }
+            })
+        }
+
+        Div({
+            classes(WtCols.wtColAutoFill)
+        }) {
+            P({
+                classes(WtTexts.wtText3)
+            }) {
+                Text(
+                    "With its current status Technology Preview, Compose for Web " +
+                            "is not production-ready, and should only be used in experiments. " +
+                            "We are hard at work to bring you great learning materials, tutorials, " +
+                            "and documentation, and optimize the performance of Compose for Web in the future!"
+                )
+            }
+        }
+    }
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/content/JoinUs.kt

@@ -0,0 +1,72 @@
+package com.sample.content
+
+import androidx.compose.runtime.Composable
+import org.jetbrains.compose.web.attributes.ATarget
+import org.jetbrains.compose.web.attributes.target
+import org.jetbrains.compose.web.dom.*
+import org.jetbrains.compose.web.css.*
+import com.sample.components.ContainerInSection
+import com.sample.style.*
+
+@Composable
+fun JoinUs() {
+    ContainerInSection(WtSections.wtSectionBgGrayLight) {
+        Div(attrs = {
+            classes(WtRows.wtRow, WtRows.wtRowSizeM)
+        }) {
+            Div(attrs = {
+                classes(WtCols.wtCol9, WtCols.wtColMd11, WtCols.wtColSm12)
+            }) {
+
+                P(attrs = {
+                    classes(WtTexts.wtSubtitle2)
+                }) {
+                    Text("Interested in Compose for other platforms?")
+
+                    P {
+                        Text("Have a look at ")
+                        A(href = "https://www.jetbrains.com/lp/compose/", attrs = {
+                            classes(WtTexts.wtLink)
+                            target(ATarget.Blank)
+                        }) {
+                            Text("Compose for Desktop")
+                        }
+                    }
+                }
+
+                P(attrs = {
+                    classes(WtTexts.wtSubtitle2, WtOffsets.wtTopOffset24)
+                }) {
+                    Text("Feel free to join the ")
+                    LinkToSlack(
+                        url = "https://kotlinlang.slack.com/archives/C01F2HV7868",
+                        text = "#compose-web"
+                    )
+                    Text(" channel on Kotlin Slack to discuss Compose for Web, or ")
+                    LinkToSlack(
+                        url = "https://kotlinlang.slack.com/archives/CJLTWPH7S",
+                        text = "#compose"
+                    )
+                    Text(" for general Compose discussions")
+                }
+            }
+        }
+
+        A(attrs = {
+            classes(WtTexts.wtButton, WtTexts.wtButtonContrast, WtOffsets.wtTopOffset24)
+            target(ATarget.Blank)
+        }, href = "https://surveys.jetbrains.com/s3/kotlin-slack-sign-up") {
+            Text("Join Kotlin Slack")
+        }
+    }
+}
+
+@Composable
+private fun LinkToSlack(url: String, text: String) {
+    A(href = url, attrs = {
+        target(ATarget.Blank)
+        classes(WtTexts.wtLink)
+    }) {
+        Text(text)
+    }
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/style/Stylesheet.kt

@@ -0,0 +1,95 @@
+package com.sample.style
+
+import org.jetbrains.compose.web.css.*
+import org.jetbrains.compose.web.css.selectors.CSSSelector
+
+object AppCSSVariables {
+    val wtColorGreyLight by variable<CSSColorValue>()
+    val wtColorGreyDark by variable<CSSColorValue>()
+
+    val wtOffsetTopUnit by variable<CSSUnitValue>()
+    val wtHorizontalLayoutGutter by variable<CSSUnitValue>()
+    val wtFlowUnit by variable<CSSUnitValue>()
+
+    val wtHeroFontSize by variable<CSSUnitValue>()
+    val wtHeroLineHeight by variable<CSSUnitValue>()
+    val wtSubtitle2FontSize by variable<CSSUnitValue>()
+    val wtSubtitle2LineHeight by variable<CSSUnitValue>()
+    val wtH2FontSize by variable<CSSUnitValue>()
+    val wtH2LineHeight by variable<CSSUnitValue>()
+    val wtH3FontSize by variable<CSSUnitValue>()
+    val wtH3LineHeight by variable<CSSUnitValue>()
+
+    val wtColCount by variable<StylePropertyNumber>()
+}
+
+
+object AppStylesheet : StyleSheet() {
+    val composeLogo by style {
+        property("max-width", 100.percent)
+    }
+
+    val composeTitleTag by style {
+        property("padding", "5px 12px")
+        property("letter-spacing", "normal")
+        property("font-weight", 400)
+        property("line-height", 24.px)
+
+        position(Position.Relative)
+        top((-32).px)
+        marginLeft(8.px)
+        fontSize(15.px)
+        backgroundColor(rgba(39, 40, 44, .05))
+        color(rgba(39,40,44,.7))
+        borderRadius(4.px, 4.px, 4.px)
+
+        media(mediaMaxWidth(640.px)) {
+            self style {
+                top((-16).px)
+            }
+        }
+    }
+
+    init {
+        "label, a, button" style {
+            property(
+                "font-family",
+                "system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Droid Sans,Helvetica Neue,Arial,sans-serif"
+            )
+        }
+
+        CSSSelector.Universal style {
+            AppCSSVariables.wtColorGreyLight(Color("#f4f4f4"))
+            AppCSSVariables.wtColorGreyDark(Color("#323236"))
+            AppCSSVariables.wtOffsetTopUnit(24.px)
+
+            margin(0.px)
+        }
+
+        media(mediaMaxWidth(640.px)) {
+            CSSSelector.Universal style {
+                AppCSSVariables.wtOffsetTopUnit(16.px)
+                AppCSSVariables.wtFlowUnit(16.px)
+            }
+        }
+
+        CSSSelector.Attribute(
+            name = "class",
+            value = "wtCol",
+            operator = CSSSelector.Attribute.Operator.Contains
+        ) style {
+            property("margin-right", AppCSSVariables.wtHorizontalLayoutGutter.value())
+            property("margin-left", AppCSSVariables.wtHorizontalLayoutGutter.value())
+
+            property(
+                "flex-basis",
+                "calc(8.33333%*${AppCSSVariables.wtColCount.value()} - ${AppCSSVariables.wtHorizontalLayoutGutter.value()}*2)"
+            )
+            property(
+                "max-width",
+                "calc(8.33333%*${AppCSSVariables.wtColCount.value()} - ${AppCSSVariables.wtHorizontalLayoutGutter.value()}*2)"
+            )
+            property("box-sizing", "border-box")
+        }
+    }
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/style/WtCard.kt

@@ -0,0 +1,49 @@
+package com.sample.style
+
+import org.jetbrains.compose.web.css.*
+
+object WtCards : StyleSheet(AppStylesheet) {
+    val wtCard by style {
+        display(DisplayStyle.Flex)
+        flexDirection(FlexDirection.Column)
+        border(1.px, LineStyle.Solid)
+        property("min-height", 0)
+        property("box-sizing", "border-box")
+    }
+
+    val wtCardThemeLight by style {
+        border(color = rgba(39,40,44,.2))
+        color(Color("#27282c"))
+        backgroundColor(Color("white"))
+    }
+
+    val wtCardThemeDark by style {
+        backgroundColor(rgba(255, 255, 255, 0.05))
+        color(rgba(255, 255, 255, 0.6))
+        border(0.px)
+    }
+
+    val wtCardSection by style {
+        position(Position.Relative)
+        property("overflow", "auto")
+        property("flex", "1 1 auto")
+        property("min-height", 0)
+        property("box-sizing", "border-box")
+        property("padding", "24px 32px")
+
+        media(mediaMaxWidth(640.px)) {
+            self style { padding(16.px) }
+        }
+    }
+
+    val wtVerticalFlex by style {
+        display(DisplayStyle.Flex)
+        flexDirection(FlexDirection.Column)
+        alignItems(AlignItems.FlexStart)
+    }
+
+    val wtVerticalFlexGrow by style {
+        flexGrow(1)
+        property("max-width", 100.percent)
+    }
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/style/WtCol.kt

@@ -0,0 +1,137 @@
+package com.sample.style
+
+import org.jetbrains.compose.web.css.CSSBuilder
+import org.jetbrains.compose.web.css.CSSUnitValue
+import org.jetbrains.compose.web.css.GenericStyleSheetBuilder
+import org.jetbrains.compose.web.css.StyleSheet
+import org.jetbrains.compose.web.css.flexGrow
+import org.jetbrains.compose.web.css.maxWidth
+import org.jetbrains.compose.web.css.media
+import org.jetbrains.compose.web.css.percent
+import org.jetbrains.compose.web.css.px
+import org.jetbrains.compose.web.css.mediaMaxWidth
+import org.jetbrains.compose.web.css.selectors.CSSSelector
+
+fun <TBuilder> GenericStyleSheetBuilder<TBuilder>.mediaMaxWidth(
+    value: CSSUnitValue,
+    cssSelector: CSSSelector,
+    rulesBuild: TBuilder.() -> Unit
+) {
+    media(mediaMaxWidth(value)) {
+        cssSelector style rulesBuild
+    }
+}
+
+fun CSSBuilder.forMaxWidth(value: CSSUnitValue, builder: CSSBuilder.() -> Unit) {
+    mediaMaxWidth(value, self, builder)
+}
+
+object WtCols : StyleSheet(AppStylesheet) {
+    val wtCol2 by style {
+        AppCSSVariables.wtColCount(2)
+    }
+
+    val wtCol3 by style {
+        AppCSSVariables.wtColCount(3)
+    }
+
+    val wtCol4 by style {
+        AppCSSVariables.wtColCount(4)
+    }
+
+    val wtCol5 by style {
+        AppCSSVariables.wtColCount(5)
+    }
+
+    val wtCol6 by style {
+        AppCSSVariables.wtColCount(6)
+    }
+
+    val wtCol9 by style {
+        AppCSSVariables.wtColCount(9)
+    }
+
+    val wtCol10 by style {
+        AppCSSVariables.wtColCount(10)
+    }
+
+    val wtColMd3 by style {
+        forMaxWidth(1000.px) {
+            AppCSSVariables.wtColCount(3)
+        }
+    }
+
+    val wtColMd4 by style {
+        forMaxWidth(1000.px) {
+            AppCSSVariables.wtColCount(4)
+        }
+    }
+
+    val wtColMd8 by style {
+        forMaxWidth(1000.px) {
+            AppCSSVariables.wtColCount(8)
+        }
+    }
+
+    val wtColMd9 by style {
+        forMaxWidth(1000.px) {
+            AppCSSVariables.wtColCount(9)
+        }
+    }
+
+    val wtColMd10 by style {
+        forMaxWidth(1000.px) {
+            AppCSSVariables.wtColCount(10)
+        }
+    }
+
+    val wtColMd11 by style {
+        forMaxWidth(1000.px) {
+            AppCSSVariables.wtColCount(11)
+        }
+    }
+
+    val wtColMd6 by style {
+        forMaxWidth(1000.px) {
+            AppCSSVariables.wtColCount(6)
+        }
+    }
+
+    val wtColMd12 by style {
+        forMaxWidth(1000.px) {
+            AppCSSVariables.wtColCount(12)
+        }
+    }
+
+    val wtColSm12 by style {
+        forMaxWidth(640.px) {
+            AppCSSVariables.wtColCount(12)
+        }
+    }
+
+    val wtColLg6 by style {
+        forMaxWidth(1276.px) {
+            AppCSSVariables.wtColCount(6)
+        }
+    }
+
+    val wtColSmAutoFill by style {
+        forMaxWidth(640.px) {
+            AppCSSVariables.wtColCount(0)
+            flexGrow(1)
+            property("max-width", 100.percent)
+        }
+    }
+
+    val wtColAutoFill by style {
+        AppCSSVariables.wtColCount(0)
+        flexGrow(1)
+        property("max-width", 100.percent)
+    }
+
+    val wtColInline by style {
+        AppCSSVariables.wtColCount(0)
+        property("max-width", 100.percent)
+        property("flex-basis", "auto")
+    }
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/style/WtContainer.kt

@@ -0,0 +1,38 @@
+package com.sample.style
+
+import org.jetbrains.compose.web.css.*
+
+object WtContainer : StyleSheet(AppStylesheet) {
+    val wtContainer by style {
+        property("margin-left", "auto")
+        property("margin-right", "auto")
+        property("box-sizing", "border-box")
+        property("padding-left", 22.px)
+        property("padding-right", 22.px)
+        property("max-width", 1276.px)
+
+        media(mediaMaxWidth(640.px)) {
+            self style {
+                property("max-width", 100.percent)
+                property("padding-left", 16.px)
+                property("padding-right", 16.px)
+            }
+        }
+
+        media(mediaMaxWidth(1276.px)) {
+            self style {
+                property("max-width", 996.px)
+                property("padding-left", 22.px)
+                property("padding-right", 22.px)
+            }
+        }
+
+        media(mediaMaxWidth(1000.px)) {
+            self style {
+                property("max-width", 100.percent)
+                property("padding-left", 22.px)
+                property("padding-right", 22.px)
+            }
+        }
+    }
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/style/WtDisplay.kt

@@ -0,0 +1,25 @@
+package com.sample.style
+
+import org.jetbrains.compose.web.css.*
+
+object WtDisplay : StyleSheet(AppStylesheet) {
+    val wtDisplayNone by style {
+        display(DisplayStyle.None)
+    }
+
+    val wtDisplayMdBlock by style {
+        media(mediaMaxWidth(1000.px)) {
+            self style {
+                display(DisplayStyle.Block)
+            }
+        }
+    }
+
+    val wtDisplayMdNone by style {
+        media(mediaMaxWidth(1000.px)) {
+            self style {
+                display(DisplayStyle.None)
+            }
+        }
+    }
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/style/WtOffest.kt

@@ -0,0 +1,41 @@
+package com.sample.style
+
+import org.jetbrains.compose.web.css.*
+
+object WtOffsets : StyleSheet(AppStylesheet) {
+    val wtTopOffset96 by style {
+        marginTop(96.px)
+        property(
+            "margin-top",
+            "calc(4*${AppCSSVariables.wtOffsetTopUnit.value(24.px)})"
+        )
+    }
+
+    val wtTopOffset24 by style {
+        marginTop(24.px)
+        property(
+            "margin-top",
+            "calc(1*${AppCSSVariables.wtOffsetTopUnit.value(24.px)})"
+        )
+    }
+
+    val wtTopOffset48 by style {
+        marginTop(48.px)
+    }
+
+    val wtTopOffsetSm12 by style {
+        media(mediaMaxWidth(640.px)) {
+            self style {
+                marginTop(12.px)
+            }
+        }
+    }
+
+    val wtTopOffsetSm24 by style {
+        media(mediaMaxWidth(640.px)) {
+            self style {
+                marginTop(24.px)
+            }
+        }
+    }
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/style/WtRow.kt

@@ -0,0 +1,42 @@
+package com.sample.style
+
+import org.jetbrains.compose.web.css.*
+
+object WtRows : StyleSheet(AppStylesheet) {
+
+    val wtRow by style {
+        AppCSSVariables.wtHorizontalLayoutGutter(0.px)
+        display(DisplayStyle.Flex)
+        flexWrap(FlexWrap.Wrap)
+
+        property(
+            "margin-right",
+            "calc(-1*${AppCSSVariables.wtHorizontalLayoutGutter.value()})"
+        )
+        property(
+            "margin-left",
+            "calc(-1*${AppCSSVariables.wtHorizontalLayoutGutter.value()})"
+        )
+        property("box-sizing", "border-box")
+    }
+
+    val wtRowSizeM by style {
+        AppCSSVariables.wtHorizontalLayoutGutter(16.px)
+
+        media(mediaMaxWidth(640.px)) {
+            self style {
+                AppCSSVariables.wtHorizontalLayoutGutter(8.px)
+            }
+        }
+    }
+
+    val wtRowSizeXs by style {
+        AppCSSVariables.wtHorizontalLayoutGutter(6.px)
+    }
+
+    val wtRowSmAlignItemsCenter by style {
+        self style {
+            alignItems(AlignItems.Center)
+        }
+    }
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/style/WtSection.kt

@@ -0,0 +1,27 @@
+package com.sample.style
+
+import org.jetbrains.compose.web.css.*
+
+object WtSections : StyleSheet(AppStylesheet) {
+
+    val wtSection by style {
+        property("box-sizing", "border-box")
+        property("padding-bottom", 96.px)
+        property("padding-top", 1.px)
+        property(
+            propertyName = "padding-bottom",
+            value = "calc(4*${AppCSSVariables.wtOffsetTopUnit.value(24.px)})"
+        )
+        backgroundColor(Color("#fff"))
+    }
+
+    val wtSectionBgGrayLight by style {
+        backgroundColor(Color("#f4f4f4"))
+        backgroundColor(AppCSSVariables.wtColorGreyLight.value())
+    }
+
+    val wtSectionBgGrayDark by style {
+        backgroundColor(Color("#323236"))
+        backgroundColor(AppCSSVariables.wtColorGreyDark.value())
+    }
+}

web/samples/web_landing/src/jsMain/kotlin/com/sample/style/WtText.kt

@@ -0,0 +1,221 @@
+package com.sample.style
+
+import org.jetbrains.compose.web.css.*
+import org.jetbrains.compose.web.css.selectors.hover
+
+object WtTexts : StyleSheet(AppStylesheet) {
+
+    val wtHero by style {
+        color(Color("#27282c"))
+        fontSize(60.px)
+        property("font-size", AppCSSVariables.wtHeroFontSize.value(60.px))
+        property("letter-spacing", (-1.5).px)
+        property("font-weight", 900)
+        property("line-height", 64.px)
+        property("line-height", AppCSSVariables.wtHeroLineHeight.value(64.px))
+
+        media(mediaMaxWidth(640.px)) {
+            self style {
+                AppCSSVariables.wtHeroFontSize(42.px)
+                AppCSSVariables.wtHeroLineHeight(48.px)
+            }
+        }
+
+        property(
+            "font-family",
+            "Gotham SSm A,Gotham SSm B,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Droid Sans,Helvetica Neue,Arial,sans-serif"
+        )
+    }
+
+    val wtSubtitle2 by style {
+        color(Color("#27282c"))
+        fontSize(28.px)
+        property("font-size", AppCSSVariables.wtSubtitle2FontSize.value(28.px))
+        property("letter-spacing", "normal")
+        property("font-weight", 300)
+        property("line-height", 40.px)
+        property("line-height", AppCSSVariables.wtSubtitle2LineHeight.value(40.px))
+
+        media(mediaMaxWidth(640.px)) {
+            self style {
+                AppCSSVariables.wtSubtitle2FontSize(24.px)
+                AppCSSVariables.wtSubtitle2LineHeight(32.px)
+            }
+        }
+
+        property(
+            "font-family",
+            "Gotham SSm A,Gotham SSm B,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Droid Sans,Helvetica Neue,Arial,sans-serif"
+        )
+    }
+
+    val wtText1 by style {
+        color(rgba(39, 40, 44, .7))
+        fontSize(18.px)
+        property("letter-spacing", "normal")
+        property("font-weight", 400)
+        property("line-height", 28.px)
+
+        property(
+            "font-family",
+            "system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Droid Sans,Helvetica Neue,Arial,sans-serif"
+        )
+    }
+
+    val wtText1ThemeDark by style {
+        color(rgba(255, 255, 255, 0.6))
+    }
+
+    val wtText2 by style {
+        color(rgba(39, 40, 44, .7))
+        fontSize(15.px)
+        property("letter-spacing", "normal")
+        property("font-weight", 400)
+        property("line-height", 24.px)
+
+        property(
+            "font-family",
+            "system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Droid Sans,Helvetica Neue,Arial,sans-serif"
+        )
+    }
+
+    val wtText3 by style {
+        color(rgba(39, 40, 44, .7))
+        fontSize(12.px)
+        property("letter-spacing", "normal")
+        property("font-weight", 400)
+        property("line-height", 16.px)
+
+        property(
+            "font-family",
+            "system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Droid Sans,Helvetica Neue,Arial,sans-serif"
+        )
+    }
+
+    val wtTextPale by style {
+        color(rgba(255, 255, 255, 0.30))
+    }
+
+    val wtText2ThemeDark by style {
+        color(rgba(255, 255, 255, 0.6))
+    }
+
+    val wtText3ThemeDark by style {
+        color(rgba(255, 255, 255, 0.6))
+    }
+
+    val wtLink by style {
+        property("border-bottom", "1px solid transparent")
+        property("text-decoration", "none")
+        color(Color("#167dff"))
+
+        hover(self) style {
+            property("border-bottom-color", "#167dff")
+        }
+    }
+
+    val wtH2 by style {
+        color(Color("#27282c"))
+        fontSize(31.px)
+        property("font-size", AppCSSVariables.wtH2FontSize.value(31.px))
+        property("letter-spacing", (-.5).px)
+        property("font-weight", 700)
+        property("line-height", 40.px)
+        property("line-height", 40.px)
+
+        media(mediaMaxWidth(640.px)) {
+            self style {
+                AppCSSVariables.wtH2FontSize(24.px)
+                AppCSSVariables.wtH2LineHeight(32.px)
+            }
+        }
+
+        property(
+            "font-family",
+            "Gotham SSm A,Gotham SSm B,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Droid Sans,Helvetica Neue,Arial,sans-serif"
+        )
+    }
+
+    val wtH2ThemeDark by style {
+        color(Color("#fff"))
+    }
+
+    val wtH3 by style {
+        color(Color("#27282c"))
+        fontSize(21.px)
+        property("font-size", AppCSSVariables.wtH3FontSize.value(20.px))
+        property("letter-spacing", "normal")
+        property("font-weight", 700)
+        property("line-height", 28.px)
+        property("line-height", AppCSSVariables.wtH3LineHeight.value(28.px))
+
+        property(
+            "font-family",
+            "system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Droid Sans,Helvetica Neue,Arial,sans-serif"
+        )
+    }
+
+    val wtH3ThemeDark by style {
+        color(Color("#fff"))
+    }
+
+    val wtButton by style {
+        color(Color("white"))
+        backgroundColor(Color("#167dff"))
+        fontSize(15.px)
+        display(DisplayStyle.InlineBlock)
+        property("text-decoration", "none")
+        property("border-radius", "24px")
+        property("padding", "12px 32px")
+        property("line-height", 24.px)
+        property("font-weight", 400)
+        property("width", "fit-content")
+
+        hover(self) style {
+            backgroundColor(rgba(22, 125, 255, .8))
+        }
+    }
+
+    val wtLangButton by style {
+        display(DisplayStyle.LegacyInlineFlex)
+        justifyContent(JustifyContent.Center)
+        alignItems(AlignItems.Center)
+        backgroundColor(Color("transparent"))
+        border(0.px)
+
+        property("outline", "none")
+
+        hover(self) style {
+            backgroundColor(rgba(255, 255, 255, 0.1))
+        }
+    }
+
+    val wtButtonContrast by style {
+        color(Color("white"))
+        backgroundColor(Color("#27282c"))
+
+        hover(self) style {
+            backgroundColor(rgba(39, 40, 44, .7))
+        }
+    }
+
+    val wtSocialButtonItem by style {
+        property("margin-right", 16.px)
+        marginLeft(16.px)
+        padding(12.px)
+        backgroundColor(Color("transparent"))
+        display(DisplayStyle.LegacyInlineFlex)
+
+        hover(self) style {
+            backgroundColor(rgba(255, 255, 255, 0.1))
+            property("border-radius", "24px")
+        }
+
+        media(mediaMaxWidth(640.px)) {
+            self style {
+                property("margin-right", 8.px)
+                property("margin-left", 8.px)
+            }
+        }
+    }
+}

web/samples/web_landing/src/jsMain/resources/hljs.css

@@ -0,0 +1,58 @@
+/*!
+ * StackOverflow.com light style
+ *
+ * @stackoverflow/stacks v0.56.0
+ * https://github.com/StackExchange/Stacks
+ */
+.hljs {
+    display: block;
+    overflow-x: auto;
+    padding: .5em;
+    color: #2f3337;
+    background: #f6f6f6
+}
+
+.hljs-comment {
+    color: #656e77
+}
+
+.hljs-attr, .hljs-doctag, .hljs-keyword, .hljs-meta, .hljs-meta-keyword, .hljs-section, .hljs-selector-class, .hljs-selector-pseudo, .hljs-selector-tag {
+    color: #015692;
+    font-weight: bold;
+}
+
+.hljs-attribute {
+    color: #803378
+}
+
+.hljs-built_in, .hljs-literal, .hljs-name, .hljs-number, .hljs-quote, .hljs-selector-id, .hljs-template-tag, .hljs-title, .hljs-type {
+    color: #b75501
+}
+
+.hljs-title {
+    font-style: italic;
+}
+
+.hljs-link, .hljs-meta-string, .hljs-regexp, .hljs-selector-attr, .hljs-string, .hljs-symbol, .hljs-template-variable, .hljs-variable {
+    color: #54790d
+}
+
+.hljs-bullet, .hljs-code {
+    color: #535a60
+}
+
+.hljs-deletion {
+    color: #c02d2e
+}
+
+.hljs-addition {
+    color: #2f6f44
+}
+
+.hljs-emphasis {
+    font-style: italic
+}
+
+.hljs-strong {
+    font-weight: 700
+}