diff --git a/web/compose-compiler-integration/README.md b/web/compose-compiler-integration/README.md
new file mode 100644
index 0000000000..25ae6ecbdb
--- /dev/null
+++ b/web/compose-compiler-integration/README.md
@@ -0,0 +1,9 @@
+RUN from project root directory:
+`./gradlew :compose-compiler-integration:checkComposeCases`
+
+
+To use specific version (the default is 0.0.0-SNASPHOT):
+`./gradlew :compose-compiler-integration:checkComposeCases -PCOMPOSE_CORE_VERSION=0.5.0-build243`
+
+To fun only filtered cases (check for contained in file path):
+`./gradlew :compose-compiler-integration:checkComposeCases -PFILTER_CASES=CaseName`
diff --git a/web/compose-compiler-integration/build.gradle.kts b/web/compose-compiler-integration/build.gradle.kts
new file mode 100644
index 0000000000..03de875e9e
--- /dev/null
+++ b/web/compose-compiler-integration/build.gradle.kts
@@ -0,0 +1,165 @@
+fun cloneTemplate(templateName: String, contentMain: String, contentLib: String): File {
+    val tempDir = file("${project.buildDir.absolutePath}/temp/cloned-$templateName")
+    tempDir.deleteRecursively()
+    tempDir.mkdirs()
+    file("${projectDir.absolutePath}/main-template").copyRecursively(tempDir)
+    // tempDir.deleteOnExit()
+    File("$tempDir/src/commonMain/kotlin/Main.kt").printWriter().use { out ->
+        out.println(contentMain)
+    }
+    File("$tempDir/lib/src/commonMain/kotlin/Lib.kt").printWriter().use { out ->
+        out.println(contentLib)
+    }
+    return tempDir
+}
+
+fun build(
+    caseName: String,
+    directory: File,
+    failureExpected: Boolean = false,
+    composeVersion: String,
+    vararg buildCmd: String = arrayOf("build", "jsNodeRun")
+) {
+    val isWin = System.getProperty("os.name").startsWith("Win")
+    val arguments = buildCmd.toMutableList().also {
+        it.add("-PCOMPOSE_CORE_VERSION=$composeVersion")
+    }.toTypedArray()
+
+    val procBuilder = if (isWin) {
+        ProcessBuilder("gradlew.bat", *arguments)
+    } else {
+        ProcessBuilder("bash", "./gradlew", *arguments)
+    }
+    val proc = procBuilder
+        .directory(directory)
+        .redirectOutput(ProcessBuilder.Redirect.PIPE)
+        .redirectError(ProcessBuilder.Redirect.PIPE)
+        .start()
+
+    proc.waitFor(5, TimeUnit.MINUTES)
+
+    "(COMPOSE_INTEGRATION_VERSION=\\[.*\\])".toRegex().find(
+        proc.inputStream.bufferedReader().readText()
+    )?.also {
+        println(it.groupValues[1])
+    }
+
+    println(proc.errorStream.bufferedReader().readText())
+
+    if (proc.exitValue() != 0 && !failureExpected) {
+        throw GradleException("Error compiling $caseName")
+    }
+
+    if (failureExpected && proc.exitValue() == 0) {
+        throw AssertionError("$caseName compilation did not fail!!!")
+    }
+}
+
+data class RunChecksResult(
+    val cases: Map<String, Throwable?>
+) {
+    val totalCount = cases.size
+    val failedCount = cases.filter { it.value != null }.size
+    val hasFailed = failedCount > 0
+
+    fun printResults() {
+        cases.forEach { (name, throwable) ->
+            println(name + " : " + (throwable ?: "OK"))
+        }
+    }
+
+    fun reportToTeamCity() {
+        cases.forEach { (caseName, error) ->
+            println("##teamcity[testStarted name='compileTestCase_$caseName']")
+            if (error != null) {
+                println("##teamcity[testFailed name='compileTestCase_$caseName']")
+            }
+            println("##teamcity[testFinished name='compileTestCase_$caseName']")
+        }
+    }
+}
+
+fun runCasesInDirectory(
+    dir: File,
+    filterPath: String,
+    expectCompilationError: Boolean,
+    composeVersion: String
+): RunChecksResult {
+    return dir.listFiles()!!.filter { it.absolutePath.contains(filterPath) }.mapIndexed { _, file ->
+        println("Running check for ${file.name}, expectCompilationError = $expectCompilationError, composeVersion = $composeVersion")
+
+        val contentLines = file.readLines()
+        val startMainLineIx = contentLines.indexOf("// @Module:Main").let { ix ->
+            if (ix == -1) 0 else ix + 1
+        }
+
+        val startLibLineIx = contentLines.indexOf("// @Module:Lib").let { ix ->
+            if (ix == -1) contentLines.size else ix - 1
+        }
+
+        require(startMainLineIx < startLibLineIx) {
+            "The convention is that @Module:Lib should go after @Module:Main"
+        }
+
+        val mainContent = contentLines.let { lines ->
+            val endLineIx = if (startLibLineIx < lines.size) startLibLineIx - 1 else lines.lastIndex
+            lines.slice(startMainLineIx..endLineIx).joinToString(separator = "\n")
+        }
+
+        val libContent = contentLines.let { lines ->
+            if (startLibLineIx < lines.size) {
+                lines.slice(startLibLineIx..lines.lastIndex)
+            } else {
+                emptyList()
+            }.joinToString(separator = "\n")
+        }
+
+        val caseName = file.name
+        val tmpDir = cloneTemplate(caseName, contentMain = mainContent, contentLib = libContent)
+
+        caseName to kotlin.runCatching {
+            build(
+                caseName = caseName,
+                directory = tmpDir,
+                failureExpected = expectCompilationError,
+                composeVersion = composeVersion
+            )
+        }.exceptionOrNull()
+
+    }.let {
+        RunChecksResult(it.toMap())
+    }
+}
+
+tasks.register("checkComposeCases") {
+    doLast {
+        val filterCases = project.findProperty("FILTER_CASES")?.toString() ?: ""
+        val composeVersion = project.findProperty("COMPOSE_CORE_VERSION")?.toString() ?: "0.0.0-SNASPHOT"
+
+        val expectedFailingCasesDir = File("${projectDir.absolutePath}/testcases/failing")
+        val expectedFailingResult = runCasesInDirectory(
+            dir = expectedFailingCasesDir,
+            expectCompilationError = true,
+            filterPath = filterCases,
+            composeVersion = composeVersion
+        )
+
+        val passingCasesDir = File("${projectDir.absolutePath}/testcases/passing")
+        val passingResult = runCasesInDirectory(
+            dir = passingCasesDir,
+            expectCompilationError = false,
+            filterPath = filterCases,
+            composeVersion = composeVersion
+        )
+
+        expectedFailingResult.printResults()
+        expectedFailingResult.reportToTeamCity()
+
+        passingResult.printResults()
+        passingResult.reportToTeamCity()
+
+        if (expectedFailingResult.hasFailed || passingResult.hasFailed) {
+            error("There were failed cases. Check the logs above")
+        }
+    }
+}
diff --git a/web/compose-compiler-integration/main-template/build.gradle.kts b/web/compose-compiler-integration/main-template/build.gradle.kts
new file mode 100644
index 0000000000..675d1858d6
--- /dev/null
+++ b/web/compose-compiler-integration/main-template/build.gradle.kts
@@ -0,0 +1,27 @@
+plugins {
+    kotlin("multiplatform") version "1.5.10"
+    id("org.jetbrains.compose")
+}
+
+repositories {
+    mavenCentral()
+    maven("https://maven.pkg.jetbrains.space/public/p/compose/dev")
+}
+
+kotlin {
+    js(IR) {
+        nodejs {}
+        browser() {}
+        binaries.executable()
+    }
+
+    sourceSets {
+        val commonMain by getting {
+            dependencies {
+                implementation(kotlin("stdlib-common"))
+                implementation(compose.runtime)
+                implementation(project(":lib"))
+            }
+        }
+    }
+}
diff --git a/web/compose-compiler-integration/main-template/gradle/wrapper/gradle-wrapper.jar b/web/compose-compiler-integration/main-template/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000000..e708b1c023
Binary files /dev/null and b/web/compose-compiler-integration/main-template/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/web/compose-compiler-integration/main-template/gradle/wrapper/gradle-wrapper.properties b/web/compose-compiler-integration/main-template/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000000..0f80bbf516
--- /dev/null
+++ b/web/compose-compiler-integration/main-template/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-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/web/compose-compiler-integration/main-template/gradlew b/web/compose-compiler-integration/main-template/gradlew
new file mode 100755
index 0000000000..fbd7c51583
--- /dev/null
+++ b/web/compose-compiler-integration/main-template/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 "$JAVACMD" "$@"
diff --git a/web/compose-compiler-integration/main-template/gradlew.bat b/web/compose-compiler-integration/main-template/gradlew.bat
new file mode 100644
index 0000000000..5093609d51
--- /dev/null
+++ b/web/compose-compiler-integration/main-template/gradlew.bat
@@ -0,0 +1,104 @@
+@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 init
+
+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 init
+
+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
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+: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 %CMD_LINE_ARGS%
+
+: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
diff --git a/web/compose-compiler-integration/main-template/lib/build.gradle.kts b/web/compose-compiler-integration/main-template/lib/build.gradle.kts
new file mode 100644
index 0000000000..784f3b836b
--- /dev/null
+++ b/web/compose-compiler-integration/main-template/lib/build.gradle.kts
@@ -0,0 +1,26 @@
+plugins {
+    kotlin("multiplatform")// version "1.5.10"
+    id("org.jetbrains.compose")// version (System.getenv("COMPOSE_INTEGRATION_VERSION") ?: "0.0.0-SNASPHOT")
+}
+
+repositories {
+    mavenCentral()
+    maven("https://maven.pkg.jetbrains.space/public/p/compose/dev")
+}
+
+kotlin {
+    js(IR) {
+        nodejs {}
+        browser() {}
+        binaries.executable()
+    }
+
+    sourceSets {
+        val commonMain by getting {
+            dependencies {
+                implementation(kotlin("stdlib-common"))
+                implementation(compose.runtime)
+            }
+        }
+    }
+}
diff --git a/web/compose-compiler-integration/main-template/lib/src/commonMain/kotlin/Lib.kt b/web/compose-compiler-integration/main-template/lib/src/commonMain/kotlin/Lib.kt
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/web/compose-compiler-integration/main-template/settings.gradle.kts b/web/compose-compiler-integration/main-template/settings.gradle.kts
new file mode 100644
index 0000000000..11be86e909
--- /dev/null
+++ b/web/compose-compiler-integration/main-template/settings.gradle.kts
@@ -0,0 +1,24 @@
+pluginManagement {
+    repositories {
+        gradlePluginPortal()
+        maven {
+            url = uri("https://maven.pkg.jetbrains.space/public/p/compose/dev")
+        }
+    }
+
+    resolutionStrategy {
+        eachPlugin {
+            if (requested.id.id == "org.jetbrains.compose") {
+                val useVersion = if (extra.has("COMPOSE_CORE_VERSION")) {
+                    extra["COMPOSE_CORE_VERSION"].toString()
+                } else {
+                    "0.0.0-SNASPHOT"
+                }
+                println("COMPOSE_INTEGRATION_VERSION=[$useVersion]")
+                useVersion(useVersion)
+            }
+        }
+    }
+}
+
+include(":lib")
diff --git a/web/compose-compiler-integration/main-template/src/commonMain/kotlin/Main.kt b/web/compose-compiler-integration/main-template/src/commonMain/kotlin/Main.kt
new file mode 100644
index 0000000000..9e9b8221ae
--- /dev/null
+++ b/web/compose-compiler-integration/main-template/src/commonMain/kotlin/Main.kt
@@ -0,0 +1 @@
+// Empty file. It's used as a template project.
diff --git a/web/compose-compiler-integration/testcases/failing/CompanionGetValueOperatorComposable.kt b/web/compose-compiler-integration/testcases/failing/CompanionGetValueOperatorComposable.kt
new file mode 100644
index 0000000000..f5a0dd9917
--- /dev/null
+++ b/web/compose-compiler-integration/testcases/failing/CompanionGetValueOperatorComposable.kt
@@ -0,0 +1,25 @@
+// @Module:Main
+
+// https://github.com/JetBrains/compose-jb/issues/827
+
+import kotlin.reflect.KProperty
+import androidx.compose.runtime.Composable
+
+interface Router {
+    companion object {
+        @Composable
+        operator fun getValue(ref: Any?, property: KProperty<*>): Router {
+            return object : Router {}
+        }
+    }
+}
+
+fun main() {
+    callComposable {
+        val router by Router
+    }
+}
+
+fun callComposable(content: @Composable () -> Unit) {
+    // does nothing
+}
diff --git a/web/compose-compiler-integration/testcases/failing/InstanceGetValueOperatorComposable.kt b/web/compose-compiler-integration/testcases/failing/InstanceGetValueOperatorComposable.kt
new file mode 100644
index 0000000000..9f2e6d36ec
--- /dev/null
+++ b/web/compose-compiler-integration/testcases/failing/InstanceGetValueOperatorComposable.kt
@@ -0,0 +1,23 @@
+// @Module:Main
+
+// https://github.com/JetBrains/compose-jb/issues/827
+
+import kotlin.reflect.KProperty
+import androidx.compose.runtime.Composable
+
+class Router {
+    @Composable
+    operator fun getValue(ref: Any?, property: KProperty<*>): Router {
+        return Router()
+    }
+}
+
+fun main() {
+    callComposable {
+        val router by Router()
+    }
+}
+
+fun callComposable(content: @Composable () -> Unit) {
+    // does nothing
+}
diff --git a/web/compose-compiler-integration/testcases/failing/WithComposableBlockUsingTypeParameterAndDefaultValue.kt b/web/compose-compiler-integration/testcases/failing/WithComposableBlockUsingTypeParameterAndDefaultValue.kt
new file mode 100644
index 0000000000..8a17d35e11
--- /dev/null
+++ b/web/compose-compiler-integration/testcases/failing/WithComposableBlockUsingTypeParameterAndDefaultValue.kt
@@ -0,0 +1,30 @@
+// https://github.com/JetBrains/compose-jb/issues/774
+
+import androidx.compose.runtime.Composable
+
+fun main() {
+    callComposable {
+        Foo<String> {  }
+        FooTakesTypedComposableLambda2("T")
+        FooTakesTypedComposableLambda3("T")
+    }
+}
+
+fun callComposable(content: @Composable () -> Unit) {
+    // does nothing
+}
+
+class RouterState<C>
+
+@Composable
+fun <C : Any> Foo(block: @Composable (RouterState<C>) -> Unit = {}) {}
+
+@Composable
+fun <T> FooTakesTypedComposableLambda2(t: T, composable: @Composable (T) -> T = { t }) {
+    composable(t)
+}
+
+@Composable
+fun <T> FooTakesTypedComposableLambda3(t: T, composable: @Composable () -> T = { t }) {
+    composable()
+}
diff --git a/web/compose-compiler-integration/testcases/passing/ComposableWithParamsWithDefaultValues.kt b/web/compose-compiler-integration/testcases/passing/ComposableWithParamsWithDefaultValues.kt
new file mode 100644
index 0000000000..39585b16e9
--- /dev/null
+++ b/web/compose-compiler-integration/testcases/passing/ComposableWithParamsWithDefaultValues.kt
@@ -0,0 +1,67 @@
+// @Module:Main
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.currentComposer
+import androidx.compose.runtime.Composer
+
+fun main() {
+    callComposable {
+        FooTakesLambda()
+        InlineFooTakesLambda()
+
+        FooTakesComposableLambda()
+        InlineFooTakesComposableLambda()
+
+        FooTakesTypedExtesionComposableLambdaWithExplicitTypesAndDefaultLambda("4", 5)
+        ComposableWithDifferentDefaultValuesForParameters(a = Any())
+        ComposableWithReturnAndWithDefaultLambda().invoke()
+    }
+}
+
+fun callComposable(content: @Composable () -> Unit) {
+    val c = content
+}
+
+// @Module:Lib
+import androidx.compose.runtime.Composable
+
+@Composable
+fun FooTakesLambda(block: () -> Unit = {}) {
+    block()
+}
+
+@Composable
+inline fun InlineFooTakesLambda(block: () -> Unit = {}) {
+    block()
+}
+
+@Composable
+fun FooTakesComposableLambda(composable: @Composable () -> Unit = {}) {
+    composable()
+}
+
+@Composable
+inline fun InlineFooTakesComposableLambda(composable: @Composable () -> Unit = {}) {
+    composable()
+}
+
+@Composable
+fun FooTakesTypedExtesionComposableLambdaWithExplicitTypesAndDefaultLambda(
+    t: String, k: Int, composable: @Composable String.(Int) -> Double = { (this + ". $it").toDouble() }
+) {
+    t.composable(k)
+}
+
+@Composable
+fun ComposableWithDifferentDefaultValuesForParameters(
+    a: Any, i: Int = 1, b: Boolean = false, s: String = "s",
+    u: Unit = Unit, a2: Any = Any(), l: List<Any> = listOf("1")
+) {
+    a.toString() + "$i $b $s $u $a2 $l"
+}
+
+@Composable
+fun ComposableWithReturnAndWithDefaultLambda(
+    l: @Composable () -> (@Composable () -> Unit) = { { } }
+): @Composable () -> Unit {
+    return { l() }
+}
diff --git a/web/compose-compiler-integration/testcases/passing/ComposableWithTypeParams.kt b/web/compose-compiler-integration/testcases/passing/ComposableWithTypeParams.kt
new file mode 100644
index 0000000000..e3ecb6ee57
--- /dev/null
+++ b/web/compose-compiler-integration/testcases/passing/ComposableWithTypeParams.kt
@@ -0,0 +1,36 @@
+// @Module:Main
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.currentComposer
+import androidx.compose.runtime.Composer
+
+fun main() {
+    callComposable {
+
+        FooTakesTypedComposableLambda { "text" }
+        FooTakesTypedComposableLambda2(10) { it + 100 }
+        FooTakesTypedExtesionComposableLambda<String, Any, Unit>("text", Any()) { }
+    }
+}
+
+fun callComposable(content: @Composable () -> Unit) {
+    val c = content
+}
+
+// @Module:Lib
+import androidx.compose.runtime.Composable
+
+
+@Composable
+fun <T> FooTakesTypedComposableLambda(composable: @Composable () -> T) {
+    composable()
+}
+
+@Composable
+fun <T> FooTakesTypedComposableLambda2(t: T, composable: @Composable (T) -> T) {
+    composable(t)
+}
+
+@Composable
+fun <T, K, R> FooTakesTypedExtesionComposableLambda(t: T, k: K, composable: @Composable T.(K) -> R) {
+    t.composable(k)
+}
diff --git a/web/compose-compiler-integration/testcases/passing/PassingComposableToConstructor.kt b/web/compose-compiler-integration/testcases/passing/PassingComposableToConstructor.kt
new file mode 100644
index 0000000000..998f694ddf
--- /dev/null
+++ b/web/compose-compiler-integration/testcases/passing/PassingComposableToConstructor.kt
@@ -0,0 +1,45 @@
+// @Module:Main
+
+// https://youtrack.jetbrains.com/issue/KT-46880
+import androidx.compose.runtime.Composable
+
+fun main() {
+    val instance = testCase {  }
+    val instance2 = TestCase2()
+
+    callComposable {
+        instance.composable()
+        instance2.composable()
+    }
+}
+
+fun callComposable(content: @Composable () -> Unit) {
+    // does nothing
+}
+
+// @Module:Lib
+import androidx.compose.runtime.Composable
+import kotlin.properties.ReadOnlyProperty
+import kotlin.reflect.KProperty
+
+class TestCase(val composable: @Composable () -> Unit) {
+    operator fun provideDelegate(
+        thisRef: Any,
+        property: KProperty<*>
+    ): ReadOnlyProperty<Any?, String> {
+        return ReadOnlyProperty { _, _ -> property.name }
+    }
+}
+
+class TestCase2(val composable: @Composable () -> Unit = {}) {
+    operator fun provideDelegate(
+        thisRef: Any,
+        property: KProperty<*>
+    ): ReadOnlyProperty<Any?, String> {
+        return ReadOnlyProperty { _, _ -> property.name }
+    }
+}
+
+fun testCase(composable: @Composable () -> Unit): TestCase {
+    return TestCase(composable)
+}
diff --git a/web/settings.gradle.kts b/web/settings.gradle.kts
index 7bd88718c9..3d6017196e 100644
--- a/web/settings.gradle.kts
+++ b/web/settings.gradle.kts
@@ -2,8 +2,8 @@ pluginManagement {
     repositories {
         gradlePluginPortal()
         mavenCentral()
-        maven { 
-            url = uri("https://maven.pkg.jetbrains.space/public/p/compose/dev") 
+        maven {
+            url = uri("https://maven.pkg.jetbrains.space/public/p/compose/dev")
         }
         maven {
             url = uri("https://packages.jetbrains.team/maven/p/ui/dev")
@@ -32,6 +32,7 @@ module(":web-widgets", "$rootDir/widgets")
 module(":web-integration-core", "$rootDir/integration-core")
 module(":web-integration-widgets", "$rootDir/integration-widgets")
 module(":web-benchmark-core", "$rootDir/benchmark-core")
+module(":compose-compiler-integration", "$rootDir/compose-compiler-integration")
 
 if (extra["COMPOSE_WEB_BUILD_WITH_EXAMPLES"]!!.toString().toBoolean() == true) {
     println("building with examples")