diff --git a/web/integration-widgets/src/commonMain/kotlin/App.kt b/web/integration-widgets/src/commonMain/kotlin/App.kt
index 5c4e545978..4df2914440 100644
--- a/web/integration-widgets/src/commonMain/kotlin/App.kt
+++ b/web/integration-widgets/src/commonMain/kotlin/App.kt
@@ -2,16 +2,11 @@ package org.jetbrainsc.compose.common.demo
 
 import androidx.compose.runtime.Composable
 import org.jetbrains.compose.common.foundation.layout.Box
-import org.jetbrains.compose.common.ui.Modifier
-import org.jetbrains.compose.common.ui.size
-import org.jetbrains.compose.common.ui.background
-import org.jetbrains.compose.common.ui.padding
 import org.jetbrains.compose.common.ui.unit.dp
 import org.jetbrains.compose.common.core.graphics.Color
 import org.jetbrains.compose.common.foundation.layout.Row
 import org.jetbrains.compose.common.foundation.layout.Column
 import org.jetbrains.compose.common.foundation.layout.Arrangement
-import org.jetbrains.compose.common.ui.Alignment
 import org.jetbrains.compose.common.foundation.border
 import org.jetbrains.compose.common.material.Text
 import org.jetbrains.compose.common.ui.unit.em
@@ -23,7 +18,9 @@ import org.jetbrains.compose.common.foundation.layout.width
 import org.jetbrains.compose.common.foundation.clickable
 import org.jetbrains.compose.common.ui.draw.clip
 import jetbrains.compose.common.shapes.CircleShape
+import org.jetbrains.compose.common.ui.*
 
+@OptIn(ExperimentalComposeWebWidgetsApi::class)
 object LayoutSamples {
     @Composable
     fun TwoTexts() {
@@ -128,4 +125,4 @@ object LayoutSamples {
 @Composable
 fun App() {
     LayoutSamples.TwoTextsInColumn()
-}
\ No newline at end of file
+}
diff --git a/web/widgets/src/commonMain/kotlin/Alignment.kt b/web/widgets/src/commonMain/kotlin/Alignment.kt
index 0f3c8e6e5c..0f85bd5022 100644
--- a/web/widgets/src/commonMain/kotlin/Alignment.kt
+++ b/web/widgets/src/commonMain/kotlin/Alignment.kt
@@ -1,5 +1,6 @@
 package org.jetbrains.compose.common.ui
 
+@ExperimentalComposeWebWidgetsApi
 interface Alignment {
     interface Vertical : Alignment
     interface Horizontal : Alignment
@@ -11,9 +12,9 @@ interface Alignment {
         val CenterStart = object : Alignment {}
         val Center = object : Alignment {}
         val CenterEnd = object : Alignment {}
-        val BoottomStart = object : Alignment {}
-        val BoottomCenter = object : Alignment {}
-        val BoottomEnd = object : Alignment {}
+        val BottomStart = object : Alignment {}
+        val BottomCenter = object : Alignment {}
+        val BottomEnd = object : Alignment {}
 
         val Top = object : Alignment.Vertical {}
         val CenterVertically = object : Alignment.Vertical {}
diff --git a/web/widgets/src/commonMain/kotlin/Arrangement.kt b/web/widgets/src/commonMain/kotlin/Arrangement.kt
index 23006c8f9b..f2f3bf5970 100644
--- a/web/widgets/src/commonMain/kotlin/Arrangement.kt
+++ b/web/widgets/src/commonMain/kotlin/Arrangement.kt
@@ -1,7 +1,13 @@
 package org.jetbrains.compose.common.foundation.layout
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
+
+@ExperimentalComposeWebWidgetsApi
 object Arrangement {
+    @ExperimentalComposeWebWidgetsApi
     interface Horizontal
+
+    @ExperimentalComposeWebWidgetsApi
     interface Vertical
 
     val End = object : Horizontal {}
diff --git a/web/widgets/src/commonMain/kotlin/Color.kt b/web/widgets/src/commonMain/kotlin/Color.kt
index d38d7903ab..acdc34f6ac 100644
--- a/web/widgets/src/commonMain/kotlin/Color.kt
+++ b/web/widgets/src/commonMain/kotlin/Color.kt
@@ -1,5 +1,8 @@
 package org.jetbrains.compose.common.core.graphics
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
+
+@ExperimentalComposeWebWidgetsApi
 public data class Color(val red: Int, val green: Int, val blue: Int) {
 
     companion object {
diff --git a/web/widgets/src/commonMain/kotlin/ExperimentalComposeWebWidgetsApi.kt b/web/widgets/src/commonMain/kotlin/ExperimentalComposeWebWidgetsApi.kt
new file mode 100644
index 0000000000..050cb26290
--- /dev/null
+++ b/web/widgets/src/commonMain/kotlin/ExperimentalComposeWebWidgetsApi.kt
@@ -0,0 +1,4 @@
+package org.jetbrains.compose.common.ui
+
+@RequiresOptIn("This API is experimental and is likely to change in the future.")
+annotation class ExperimentalComposeWebWidgetsApi()
diff --git a/web/widgets/src/commonMain/kotlin/Modifier.kt b/web/widgets/src/commonMain/kotlin/Modifier.kt
index 72a25d16af..8422f51454 100644
--- a/web/widgets/src/commonMain/kotlin/Modifier.kt
+++ b/web/widgets/src/commonMain/kotlin/Modifier.kt
@@ -3,10 +3,14 @@ package org.jetbrains.compose.common.ui
 import org.jetbrains.compose.common.ui.unit.Dp
 import org.jetbrains.compose.common.core.graphics.Color
 
+@ExperimentalComposeWebWidgetsApi
 interface Modifier {
     open class Element : Modifier
     companion object : Element()
 }
 
+@ExperimentalComposeWebWidgetsApi
 expect fun Modifier.background(color: Color): Modifier
-expect fun Modifier.padding(all: Dp): Modifier
\ No newline at end of file
+
+@ExperimentalComposeWebWidgetsApi
+expect fun Modifier.padding(all: Dp): Modifier
diff --git a/web/widgets/src/commonMain/kotlin/layouts/box.kt b/web/widgets/src/commonMain/kotlin/layouts/box.kt
index 2424d291af..fab973ad7a 100644
--- a/web/widgets/src/commonMain/kotlin/layouts/box.kt
+++ b/web/widgets/src/commonMain/kotlin/layouts/box.kt
@@ -2,6 +2,8 @@ package org.jetbrains.compose.common.foundation.layout
 
 import org.jetbrains.compose.common.ui.Modifier
 import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 
 @Composable
+@ExperimentalComposeWebWidgetsApi
 internal expect fun BoxActual(modifier: Modifier, content: @Composable () -> Unit)
diff --git a/web/widgets/src/commonMain/kotlin/layouts/button.kt b/web/widgets/src/commonMain/kotlin/layouts/button.kt
index 6e64a0c8c7..3ac0d0a6d5 100644
--- a/web/widgets/src/commonMain/kotlin/layouts/button.kt
+++ b/web/widgets/src/commonMain/kotlin/layouts/button.kt
@@ -2,9 +2,11 @@ package org.jetbrains.compose.common.material
 
 import org.jetbrains.compose.common.ui.Modifier
 import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 
 @Composable
-expect fun ButtonActual(
+@ExperimentalComposeWebWidgetsApi
+internal expect fun ButtonActual(
     modifier: Modifier,
     onClick: () -> Unit,
     content: @Composable () -> Unit
diff --git a/web/widgets/src/commonMain/kotlin/layouts/column.kt b/web/widgets/src/commonMain/kotlin/layouts/column.kt
index 28c1aef387..fcd19949de 100644
--- a/web/widgets/src/commonMain/kotlin/layouts/column.kt
+++ b/web/widgets/src/commonMain/kotlin/layouts/column.kt
@@ -2,6 +2,8 @@ package org.jetbrains.compose.common.foundation.layout
 
 import org.jetbrains.compose.common.ui.Modifier
 import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 
 @Composable
+@ExperimentalComposeWebWidgetsApi
 internal expect fun ColumnActual(modifier: Modifier, content: @Composable () -> Unit)
diff --git a/web/widgets/src/commonMain/kotlin/layouts/defaults/BoxDefault.kt b/web/widgets/src/commonMain/kotlin/layouts/defaults/BoxDefault.kt
index be8b9750dd..4b50e6c074 100644
--- a/web/widgets/src/commonMain/kotlin/layouts/defaults/BoxDefault.kt
+++ b/web/widgets/src/commonMain/kotlin/layouts/defaults/BoxDefault.kt
@@ -2,8 +2,10 @@ package org.jetbrains.compose.common.foundation.layout
 
 import org.jetbrains.compose.common.ui.Modifier
 import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 
 @Composable
+@ExperimentalComposeWebWidgetsApi
 fun Box(
     modifier: Modifier = Modifier.Companion,
     content: @Composable () -> Unit
diff --git a/web/widgets/src/commonMain/kotlin/layouts/defaults/ButtonDefault.kt b/web/widgets/src/commonMain/kotlin/layouts/defaults/ButtonDefault.kt
index 6aded72c67..3362ac5fdb 100644
--- a/web/widgets/src/commonMain/kotlin/layouts/defaults/ButtonDefault.kt
+++ b/web/widgets/src/commonMain/kotlin/layouts/defaults/ButtonDefault.kt
@@ -2,8 +2,10 @@ package org.jetbrains.compose.common.material
 
 import org.jetbrains.compose.common.ui.Modifier
 import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 
 @Composable
+@ExperimentalComposeWebWidgetsApi
 fun Button(
     modifier: Modifier = Modifier.Companion,
     onClick: () -> Unit,
diff --git a/web/widgets/src/commonMain/kotlin/layouts/defaults/ColumnDefault.kt b/web/widgets/src/commonMain/kotlin/layouts/defaults/ColumnDefault.kt
index 109a6c68fe..66d3e45176 100644
--- a/web/widgets/src/commonMain/kotlin/layouts/defaults/ColumnDefault.kt
+++ b/web/widgets/src/commonMain/kotlin/layouts/defaults/ColumnDefault.kt
@@ -2,8 +2,10 @@ package org.jetbrains.compose.common.foundation.layout
 
 import org.jetbrains.compose.common.ui.Modifier
 import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 
 @Composable
+@ExperimentalComposeWebWidgetsApi
 fun Column(
     modifier: Modifier = Modifier.Companion,
     content: @Composable () -> Unit
diff --git a/web/widgets/src/commonMain/kotlin/layouts/defaults/ModifierDefault.kt b/web/widgets/src/commonMain/kotlin/layouts/defaults/ModifierDefault.kt
index 66889da156..18f31742c8 100644
--- a/web/widgets/src/commonMain/kotlin/layouts/defaults/ModifierDefault.kt
+++ b/web/widgets/src/commonMain/kotlin/layouts/defaults/ModifierDefault.kt
@@ -2,6 +2,7 @@ package org.jetbrains.compose.common.ui
 
 import org.jetbrains.compose.common.ui.unit.Dp
 
+@ExperimentalComposeWebWidgetsApi
 fun Modifier.size(size: Dp): Modifier {
     return size(size, size)
 }
diff --git a/web/widgets/src/commonMain/kotlin/layouts/defaults/RowDefault.kt b/web/widgets/src/commonMain/kotlin/layouts/defaults/RowDefault.kt
index a3c6d0cd5b..7dc4493de9 100644
--- a/web/widgets/src/commonMain/kotlin/layouts/defaults/RowDefault.kt
+++ b/web/widgets/src/commonMain/kotlin/layouts/defaults/RowDefault.kt
@@ -3,8 +3,10 @@ package org.jetbrains.compose.common.foundation.layout
 import org.jetbrains.compose.common.ui.Modifier
 import androidx.compose.runtime.Composable
 import org.jetbrains.compose.common.ui.Alignment
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 
 @Composable
+@ExperimentalComposeWebWidgetsApi
 fun Row(
     modifier: Modifier = Modifier.Companion,
     horizontalArrangement: Arrangement.Horizontal = Arrangement.Start,
diff --git a/web/widgets/src/commonMain/kotlin/layouts/defaults/SliderDefault.kt b/web/widgets/src/commonMain/kotlin/layouts/defaults/SliderDefault.kt
index 02d8192e1e..4f5633de2c 100644
--- a/web/widgets/src/commonMain/kotlin/layouts/defaults/SliderDefault.kt
+++ b/web/widgets/src/commonMain/kotlin/layouts/defaults/SliderDefault.kt
@@ -1,9 +1,11 @@
 package org.jetbrains.compose.common.material
 
 import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.Modifier
 
 @Composable
+@ExperimentalComposeWebWidgetsApi
 fun Slider(
     value: Float,
     onValueChange: (Float) -> Unit = {},
diff --git a/web/widgets/src/commonMain/kotlin/layouts/defaults/TextDefault.kt b/web/widgets/src/commonMain/kotlin/layouts/defaults/TextDefault.kt
index 23d606d418..37812a04c2 100644
--- a/web/widgets/src/commonMain/kotlin/layouts/defaults/TextDefault.kt
+++ b/web/widgets/src/commonMain/kotlin/layouts/defaults/TextDefault.kt
@@ -3,9 +3,11 @@ package org.jetbrains.compose.common.material
 import androidx.compose.runtime.Composable
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.core.graphics.Color
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.unit.TextUnit
 
 @Composable
+@ExperimentalComposeWebWidgetsApi
 fun Text(
     text: String,
     modifier: Modifier = Modifier.Companion,
diff --git a/web/widgets/src/commonMain/kotlin/layouts/row.kt b/web/widgets/src/commonMain/kotlin/layouts/row.kt
index 566629095a..574ce08303 100644
--- a/web/widgets/src/commonMain/kotlin/layouts/row.kt
+++ b/web/widgets/src/commonMain/kotlin/layouts/row.kt
@@ -3,8 +3,10 @@ package org.jetbrains.compose.common.foundation.layout
 import org.jetbrains.compose.common.ui.Modifier
 import androidx.compose.runtime.Composable
 import org.jetbrains.compose.common.ui.Alignment
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 
 @Composable
+@ExperimentalComposeWebWidgetsApi
 internal expect fun RowActual(
     modifier: Modifier,
     horizontalArrangement: Arrangement.Horizontal,
diff --git a/web/widgets/src/commonMain/kotlin/layouts/shapes/shapes.kt b/web/widgets/src/commonMain/kotlin/layouts/shapes/shapes.kt
index 9cb983c06a..fa63b70f7e 100644
--- a/web/widgets/src/commonMain/kotlin/layouts/shapes/shapes.kt
+++ b/web/widgets/src/commonMain/kotlin/layouts/shapes/shapes.kt
@@ -1,5 +1,9 @@
 package jetbrains.compose.common.shapes
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
+
+@ExperimentalComposeWebWidgetsApi
 interface Shape
 
+@ExperimentalComposeWebWidgetsApi
 object CircleShape : Shape
diff --git a/web/widgets/src/commonMain/kotlin/layouts/slider.kt b/web/widgets/src/commonMain/kotlin/layouts/slider.kt
index 83b0e0a8e8..64768e32fb 100644
--- a/web/widgets/src/commonMain/kotlin/layouts/slider.kt
+++ b/web/widgets/src/commonMain/kotlin/layouts/slider.kt
@@ -1,10 +1,12 @@
 package org.jetbrains.compose.common.material
 
 import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.Modifier
 
 @Composable
-expect fun SliderActual(
+@ExperimentalComposeWebWidgetsApi
+internal expect fun SliderActual(
     value: Float,
     onValueChange: (Float) -> Unit,
     valueRange: ClosedFloatingPointRange<Float>,
diff --git a/web/widgets/src/commonMain/kotlin/layouts/text.kt b/web/widgets/src/commonMain/kotlin/layouts/text.kt
index 8a99efd06a..32a415516c 100644
--- a/web/widgets/src/commonMain/kotlin/layouts/text.kt
+++ b/web/widgets/src/commonMain/kotlin/layouts/text.kt
@@ -3,10 +3,12 @@ package org.jetbrains.compose.common.material
 import androidx.compose.runtime.Composable
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.core.graphics.Color
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.unit.TextUnit
 
 @Composable
-expect fun TextActual(
+@ExperimentalComposeWebWidgetsApi
+internal expect fun TextActual(
     text: String,
     modifier: Modifier,
     color: Color,
diff --git a/web/widgets/src/commonMain/kotlin/modifiers/border.kt b/web/widgets/src/commonMain/kotlin/modifiers/border.kt
index 19ef2cd9c7..7eecb46352 100644
--- a/web/widgets/src/commonMain/kotlin/modifiers/border.kt
+++ b/web/widgets/src/commonMain/kotlin/modifiers/border.kt
@@ -2,6 +2,8 @@ package org.jetbrains.compose.common.foundation
 
 import org.jetbrains.compose.common.ui.unit.Dp
 import org.jetbrains.compose.common.core.graphics.Color
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.Modifier
 
+@ExperimentalComposeWebWidgetsApi
 expect fun Modifier.border(size: Dp, color: Color): Modifier
diff --git a/web/widgets/src/commonMain/kotlin/modifiers/clickable.kt b/web/widgets/src/commonMain/kotlin/modifiers/clickable.kt
index fe6144c8ac..62885a22a2 100644
--- a/web/widgets/src/commonMain/kotlin/modifiers/clickable.kt
+++ b/web/widgets/src/commonMain/kotlin/modifiers/clickable.kt
@@ -1,5 +1,7 @@
 package org.jetbrains.compose.common.foundation
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.Modifier
 
+@ExperimentalComposeWebWidgetsApi
 expect fun Modifier.clickable(onClick: () -> Unit): Modifier
diff --git a/web/widgets/src/commonMain/kotlin/modifiers/clip.kt b/web/widgets/src/commonMain/kotlin/modifiers/clip.kt
index ff9ff67a2e..bb692ac68e 100644
--- a/web/widgets/src/commonMain/kotlin/modifiers/clip.kt
+++ b/web/widgets/src/commonMain/kotlin/modifiers/clip.kt
@@ -2,5 +2,7 @@ package org.jetbrains.compose.common.ui.draw
 
 import org.jetbrains.compose.common.ui.Modifier
 import jetbrains.compose.common.shapes.Shape
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 
+@ExperimentalComposeWebWidgetsApi
 expect fun Modifier.clip(shape: Shape): Modifier
diff --git a/web/widgets/src/commonMain/kotlin/modifiers/fillMaxHeight.kt b/web/widgets/src/commonMain/kotlin/modifiers/fillMaxHeight.kt
index b2181cedd8..3f9d4c8e58 100644
--- a/web/widgets/src/commonMain/kotlin/modifiers/fillMaxHeight.kt
+++ b/web/widgets/src/commonMain/kotlin/modifiers/fillMaxHeight.kt
@@ -1,5 +1,7 @@
 package org.jetbrains.compose.common.foundation.layout
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.Modifier
 
+@ExperimentalComposeWebWidgetsApi
 expect fun Modifier.fillMaxHeight(fraction: Float): Modifier
diff --git a/web/widgets/src/commonMain/kotlin/modifiers/fillMaxWidth.kt b/web/widgets/src/commonMain/kotlin/modifiers/fillMaxWidth.kt
index 895492258f..4a245bfcfa 100644
--- a/web/widgets/src/commonMain/kotlin/modifiers/fillMaxWidth.kt
+++ b/web/widgets/src/commonMain/kotlin/modifiers/fillMaxWidth.kt
@@ -1,5 +1,7 @@
 package org.jetbrains.compose.common.foundation.layout
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.Modifier
 
+@ExperimentalComposeWebWidgetsApi
 expect fun Modifier.fillMaxWidth(): Modifier
diff --git a/web/widgets/src/commonMain/kotlin/modifiers/offset.kt b/web/widgets/src/commonMain/kotlin/modifiers/offset.kt
index 2a4f4c4c91..c2683093aa 100644
--- a/web/widgets/src/commonMain/kotlin/modifiers/offset.kt
+++ b/web/widgets/src/commonMain/kotlin/modifiers/offset.kt
@@ -1,6 +1,8 @@
 package org.jetbrains.compose.common.foundation.layout
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.unit.Dp
 import org.jetbrains.compose.common.ui.Modifier
 
+@ExperimentalComposeWebWidgetsApi
 expect fun Modifier.offset(x: Dp, y: Dp): Modifier
diff --git a/web/widgets/src/commonMain/kotlin/modifiers/onSizeChanged.kt b/web/widgets/src/commonMain/kotlin/modifiers/onSizeChanged.kt
index 74e98bc2c2..3f5656bc0a 100644
--- a/web/widgets/src/commonMain/kotlin/modifiers/onSizeChanged.kt
+++ b/web/widgets/src/commonMain/kotlin/modifiers/onSizeChanged.kt
@@ -1,8 +1,10 @@
 package org.jetbrains.compose.common.ui.layout
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.ui.unit.IntSize
 
+@ExperimentalComposeWebWidgetsApi
 expect fun Modifier.onSizeChanged(
     onSizeChanged: (IntSize) -> Unit
 ): Modifier
diff --git a/web/widgets/src/commonMain/kotlin/modifiers/size.kt b/web/widgets/src/commonMain/kotlin/modifiers/size.kt
index 43ee3a9910..2aee8c9cc1 100644
--- a/web/widgets/src/commonMain/kotlin/modifiers/size.kt
+++ b/web/widgets/src/commonMain/kotlin/modifiers/size.kt
@@ -2,4 +2,5 @@ package org.jetbrains.compose.common.ui
 
 import org.jetbrains.compose.common.ui.unit.Dp
 
+@ExperimentalComposeWebWidgetsApi
 expect fun Modifier.size(width: Dp, height: Dp): Modifier
diff --git a/web/widgets/src/commonMain/kotlin/modifiers/width.kt b/web/widgets/src/commonMain/kotlin/modifiers/width.kt
index 8d4f5a1e22..6f038b2aa4 100644
--- a/web/widgets/src/commonMain/kotlin/modifiers/width.kt
+++ b/web/widgets/src/commonMain/kotlin/modifiers/width.kt
@@ -1,6 +1,8 @@
 package org.jetbrains.compose.common.foundation.layout
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.unit.Dp
 import org.jetbrains.compose.common.ui.Modifier
 
+@ExperimentalComposeWebWidgetsApi
 expect fun Modifier.width(size: Dp): Modifier
diff --git a/web/widgets/src/commonMain/kotlin/units/Dp.kt b/web/widgets/src/commonMain/kotlin/units/Dp.kt
index 86146bccf5..e27e3beb7d 100644
--- a/web/widgets/src/commonMain/kotlin/units/Dp.kt
+++ b/web/widgets/src/commonMain/kotlin/units/Dp.kt
@@ -1,3 +1,6 @@
 package org.jetbrains.compose.common.ui.unit
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
+
+@ExperimentalComposeWebWidgetsApi
 data class Dp(val value: Float)
diff --git a/web/widgets/src/commonMain/kotlin/units/IntSize.kt b/web/widgets/src/commonMain/kotlin/units/IntSize.kt
index 5099359574..6b5993408c 100644
--- a/web/widgets/src/commonMain/kotlin/units/IntSize.kt
+++ b/web/widgets/src/commonMain/kotlin/units/IntSize.kt
@@ -1,3 +1,6 @@
 package org.jetbrains.compose.common.ui.unit
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
+
+@ExperimentalComposeWebWidgetsApi
 data class IntSize(val width: Int, val height: Int)
diff --git a/web/widgets/src/commonMain/kotlin/units/TextUnit.kt b/web/widgets/src/commonMain/kotlin/units/TextUnit.kt
index a5610ce4d8..ca5fc8f15b 100644
--- a/web/widgets/src/commonMain/kotlin/units/TextUnit.kt
+++ b/web/widgets/src/commonMain/kotlin/units/TextUnit.kt
@@ -1,11 +1,15 @@
 package org.jetbrains.compose.common.ui.unit
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
+
+@ExperimentalComposeWebWidgetsApi
 enum class TextUnitType {
     Unspecified,
     Em,
     Sp
 }
 
+@ExperimentalComposeWebWidgetsApi
 data class TextUnit(val value: Float, val unitType: TextUnitType) {
     companion object {
         val Unspecified = TextUnit(Float.NaN, TextUnitType.Unspecified)
diff --git a/web/widgets/src/commonMain/kotlin/units/unitConversion.kt b/web/widgets/src/commonMain/kotlin/units/unitConversion.kt
index 50a44d06c8..12d4828d82 100644
--- a/web/widgets/src/commonMain/kotlin/units/unitConversion.kt
+++ b/web/widgets/src/commonMain/kotlin/units/unitConversion.kt
@@ -1,17 +1,24 @@
 package org.jetbrains.compose.common.ui.unit
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
+
 // TODO: this have to be in a separate package otherwise there's an error for in cross-module usage (for JVM target)
+@ExperimentalComposeWebWidgetsApi
 val Int.dp: Dp
     get() = Dp(this.toFloat())
 
+@ExperimentalComposeWebWidgetsApi
 val Int.em: TextUnit
     get() = TextUnit(toFloat(), TextUnitType.Em)
 
+@ExperimentalComposeWebWidgetsApi
 val Float.em: TextUnit
     get() = TextUnit(this, TextUnitType.Em)
 
+@ExperimentalComposeWebWidgetsApi
 val Int.sp: TextUnit
     get() = TextUnit(toFloat(), TextUnitType.Sp)
 
+@ExperimentalComposeWebWidgetsApi
 val Float.sp: TextUnit
     get() = TextUnit(this, TextUnitType.Sp)
diff --git a/web/widgets/src/jsMain/kotlin/Modifier.kt b/web/widgets/src/jsMain/kotlin/Modifier.kt
index 37b31fc7b5..bdfc90b359 100644
--- a/web/widgets/src/jsMain/kotlin/Modifier.kt
+++ b/web/widgets/src/jsMain/kotlin/Modifier.kt
@@ -9,12 +9,14 @@ import org.jetbrains.compose.web.css.Color.RGB
 import org.jetbrains.compose.common.internal.castOrCreate
 import org.jetbrains.compose.web.attributes.AttrsBuilder
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.background(color: Color): Modifier = castOrCreate().apply {
     add {
         backgroundColor(RGB(color.red, color.green, color.blue))
     }
 }
 
+@ExperimentalComposeWebWidgetsApi
 fun Modifier.asAttributeBuilderApplier(
     passThroughHandler: (AttrsBuilder<*>.() -> Unit)? = null
 ): AttrsBuilder<*>.() -> Unit =
@@ -32,6 +34,7 @@ fun Modifier.asAttributeBuilderApplier(
         st
     }
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.padding(all: Dp): Modifier = castOrCreate().apply {
     // yes, it's not a typo, what Modifier.padding does is actually adding margin
     add {
diff --git a/web/widgets/src/jsMain/kotlin/internal/ActualModifier.kt b/web/widgets/src/jsMain/kotlin/internal/ActualModifier.kt
index 4de808efc0..2036486b3e 100644
--- a/web/widgets/src/jsMain/kotlin/internal/ActualModifier.kt
+++ b/web/widgets/src/jsMain/kotlin/internal/ActualModifier.kt
@@ -1,9 +1,11 @@
 package org.jetbrains.compose.common.internal
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.web.css.StyleBuilder
 import org.jetbrains.compose.web.attributes.AttrsBuilder
 
+@ExperimentalComposeWebWidgetsApi
 class ActualModifier : Modifier {
     val styleHandlers = mutableListOf<StyleBuilder.() -> Unit>()
     val attrHandlers = mutableListOf<AttrsBuilder<*>.() -> Unit>()
@@ -17,4 +19,5 @@ class ActualModifier : Modifier {
     }
 }
 
+@ExperimentalComposeWebWidgetsApi
 fun Modifier.castOrCreate(): ActualModifier = (this as? ActualModifier) ?: ActualModifier()
diff --git a/web/widgets/src/jsMain/kotlin/layouts/box.kt b/web/widgets/src/jsMain/kotlin/layouts/box.kt
index 964f6e0f49..c39e5d958e 100644
--- a/web/widgets/src/jsMain/kotlin/layouts/box.kt
+++ b/web/widgets/src/jsMain/kotlin/layouts/box.kt
@@ -2,10 +2,12 @@ package org.jetbrains.compose.common.foundation.layout
 
 import org.jetbrains.compose.common.ui.Modifier
 import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.web.dom.Div
 import org.jetbrains.compose.common.ui.asAttributeBuilderApplier
 
 @Composable
+@ExperimentalComposeWebWidgetsApi
 internal actual fun BoxActual(modifier: Modifier, content: @Composable () -> Unit) {
     Div(
         attrs = modifier.asAttributeBuilderApplier()
diff --git a/web/widgets/src/jsMain/kotlin/layouts/button.kt b/web/widgets/src/jsMain/kotlin/layouts/button.kt
index b4717af029..8a80b02c2b 100644
--- a/web/widgets/src/jsMain/kotlin/layouts/button.kt
+++ b/web/widgets/src/jsMain/kotlin/layouts/button.kt
@@ -2,9 +2,11 @@ package org.jetbrains.compose.common.material
 
 import org.jetbrains.compose.common.ui.Modifier
 import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.web.dom.Button
 
 @Composable
+@ExperimentalComposeWebWidgetsApi
 actual fun ButtonActual(
     modifier: Modifier,
     onClick: () -> Unit,
diff --git a/web/widgets/src/jsMain/kotlin/layouts/column.kt b/web/widgets/src/jsMain/kotlin/layouts/column.kt
index 2de1eedda1..3a5a2e5a4f 100644
--- a/web/widgets/src/jsMain/kotlin/layouts/column.kt
+++ b/web/widgets/src/jsMain/kotlin/layouts/column.kt
@@ -2,10 +2,12 @@ package org.jetbrains.compose.common.foundation.layout
 
 import org.jetbrains.compose.common.ui.Modifier
 import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.web.dom.Div
 import org.jetbrains.compose.web.ui.Styles
 
 @Composable
+@ExperimentalComposeWebWidgetsApi
 internal actual fun ColumnActual(modifier: Modifier, content: @Composable () -> Unit) {
     Div(
         attrs = {
diff --git a/web/widgets/src/jsMain/kotlin/layouts/row.kt b/web/widgets/src/jsMain/kotlin/layouts/row.kt
index 196b11b1a8..e55d5ffab1 100644
--- a/web/widgets/src/jsMain/kotlin/layouts/row.kt
+++ b/web/widgets/src/jsMain/kotlin/layouts/row.kt
@@ -4,13 +4,16 @@ import org.jetbrains.compose.common.ui.Modifier
 import androidx.compose.runtime.Composable
 import org.jetbrains.compose.web.dom.Div
 import org.jetbrains.compose.common.ui.Alignment
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.web.ui.Styles
 
+@OptIn(ExperimentalComposeWebWidgetsApi::class)
 private fun Arrangement.Horizontal.asClassName() = when (this) {
     Arrangement.End -> Styles.composeWebArrangementHorizontalEnd
     else -> Styles.composeWebArrangementHorizontalStart
 }
 
+@OptIn(ExperimentalComposeWebWidgetsApi::class)
 private fun Alignment.Vertical.asClassName() = when (this) {
     Alignment.Top -> Styles.composeWebAlignmentVerticalTop
     Alignment.CenterVertically -> Styles.composeWebAlignmentVerticalCenter
@@ -18,6 +21,7 @@ private fun Alignment.Vertical.asClassName() = when (this) {
 }
 
 @Composable
+@ExperimentalComposeWebWidgetsApi
 internal actual fun RowActual(
     modifier: Modifier,
     horizontalArrangement: Arrangement.Horizontal,
diff --git a/web/widgets/src/jsMain/kotlin/layouts/slider.kt b/web/widgets/src/jsMain/kotlin/layouts/slider.kt
index 396628c7fd..a40f998c19 100644
--- a/web/widgets/src/jsMain/kotlin/layouts/slider.kt
+++ b/web/widgets/src/jsMain/kotlin/layouts/slider.kt
@@ -1,12 +1,14 @@
 package org.jetbrains.compose.common.material
 
 import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.web.dom.Input
 import org.jetbrains.compose.web.attributes.InputType
 import org.jetbrains.compose.web.attributes.value
 
 @Composable
+@ExperimentalComposeWebWidgetsApi
 actual fun SliderActual(
     value: Float,
     onValueChange: (Float) -> Unit,
diff --git a/web/widgets/src/jsMain/kotlin/layouts/text.kt b/web/widgets/src/jsMain/kotlin/layouts/text.kt
index 2d3ef666e8..a4a6a38ed4 100644
--- a/web/widgets/src/jsMain/kotlin/layouts/text.kt
+++ b/web/widgets/src/jsMain/kotlin/layouts/text.kt
@@ -7,6 +7,7 @@ import org.jetbrains.compose.web.ui.Styles
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.ui.asAttributeBuilderApplier
 import org.jetbrains.compose.common.core.graphics.Color
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.web.css.color
 import org.jetbrains.compose.web.css.fontSize
 import org.jetbrains.compose.web.css.Color.RGB
@@ -16,7 +17,8 @@ import org.jetbrains.compose.web.css.em
 import org.jetbrains.compose.web.css.px
 
 @Composable
-actual fun TextActual(
+@ExperimentalComposeWebWidgetsApi
+internal actual fun TextActual(
     text: String,
     modifier: Modifier,
     color: Color,
diff --git a/web/widgets/src/jsMain/kotlin/modifiers/border.kt b/web/widgets/src/jsMain/kotlin/modifiers/border.kt
index 007d0bb58b..fa4611fb8e 100644
--- a/web/widgets/src/jsMain/kotlin/modifiers/border.kt
+++ b/web/widgets/src/jsMain/kotlin/modifiers/border.kt
@@ -4,11 +4,13 @@ import org.jetbrains.compose.common.ui.unit.Dp
 import org.jetbrains.compose.common.core.graphics.Color
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.internal.castOrCreate
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.web.css.px
 import org.jetbrains.compose.web.css.LineStyle
 import org.jetbrains.compose.web.css.border
 import org.jetbrains.compose.web.css.Color.RGB
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.border(size: Dp, color: Color): Modifier = castOrCreate().apply {
     add {
         border(size.value.px, LineStyle.Solid, RGB(color.red, color.green, color.blue))
diff --git a/web/widgets/src/jsMain/kotlin/modifiers/clickable.kt b/web/widgets/src/jsMain/kotlin/modifiers/clickable.kt
index b415dc958a..aaccf54ff0 100644
--- a/web/widgets/src/jsMain/kotlin/modifiers/clickable.kt
+++ b/web/widgets/src/jsMain/kotlin/modifiers/clickable.kt
@@ -2,7 +2,9 @@ package org.jetbrains.compose.common.foundation
 
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.internal.castOrCreate
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.clickable(onClick: () -> Unit): Modifier = castOrCreate().apply {
     addAttributeBuilder {
         onClick { onClick() }
diff --git a/web/widgets/src/jsMain/kotlin/modifiers/clip.kt b/web/widgets/src/jsMain/kotlin/modifiers/clip.kt
index f101d2ca3d..b0b5db130f 100644
--- a/web/widgets/src/jsMain/kotlin/modifiers/clip.kt
+++ b/web/widgets/src/jsMain/kotlin/modifiers/clip.kt
@@ -4,9 +4,11 @@ import org.jetbrains.compose.common.ui.Modifier
 import jetbrains.compose.common.shapes.Shape
 import jetbrains.compose.common.shapes.CircleShape
 import org.jetbrains.compose.common.internal.castOrCreate
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.web.css.borderRadius
 import org.jetbrains.compose.web.css.percent
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.clip(shape: Shape): Modifier = castOrCreate().apply {
     when (shape) {
         CircleShape -> add {
diff --git a/web/widgets/src/jsMain/kotlin/modifiers/fillMaxHeight.kt b/web/widgets/src/jsMain/kotlin/modifiers/fillMaxHeight.kt
index 1ee772d266..fddfb6aff8 100644
--- a/web/widgets/src/jsMain/kotlin/modifiers/fillMaxHeight.kt
+++ b/web/widgets/src/jsMain/kotlin/modifiers/fillMaxHeight.kt
@@ -2,9 +2,11 @@ package org.jetbrains.compose.common.foundation.layout
 
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.internal.castOrCreate
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.web.css.height
 import org.jetbrains.compose.web.css.percent
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.fillMaxHeight(fraction: Float): Modifier = castOrCreate().apply {
     add {
         height((100 * fraction).percent)
diff --git a/web/widgets/src/jsMain/kotlin/modifiers/fillMaxWidth.kt b/web/widgets/src/jsMain/kotlin/modifiers/fillMaxWidth.kt
index f9536088ce..2565d7f951 100644
--- a/web/widgets/src/jsMain/kotlin/modifiers/fillMaxWidth.kt
+++ b/web/widgets/src/jsMain/kotlin/modifiers/fillMaxWidth.kt
@@ -2,9 +2,11 @@ package org.jetbrains.compose.common.foundation.layout
 
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.internal.castOrCreate
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.web.css.width
 import org.jetbrains.compose.web.css.percent
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.fillMaxWidth(): Modifier = castOrCreate().apply {
     add {
         width(100.percent)
diff --git a/web/widgets/src/jsMain/kotlin/modifiers/offset.kt b/web/widgets/src/jsMain/kotlin/modifiers/offset.kt
index 09afff25c2..9140047056 100644
--- a/web/widgets/src/jsMain/kotlin/modifiers/offset.kt
+++ b/web/widgets/src/jsMain/kotlin/modifiers/offset.kt
@@ -3,10 +3,12 @@ package org.jetbrains.compose.common.foundation.layout
 import org.jetbrains.compose.common.ui.unit.Dp
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.internal.castOrCreate
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.web.css.marginTop
 import org.jetbrains.compose.web.css.marginLeft
 import org.jetbrains.compose.web.css.px
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.offset(x: Dp, y: Dp): Modifier = castOrCreate().apply {
     add {
         marginLeft(x.value.px)
diff --git a/web/widgets/src/jsMain/kotlin/modifiers/onSizeChanged.kt b/web/widgets/src/jsMain/kotlin/modifiers/onSizeChanged.kt
index 3803ed0770..1ebd302d2b 100644
--- a/web/widgets/src/jsMain/kotlin/modifiers/onSizeChanged.kt
+++ b/web/widgets/src/jsMain/kotlin/modifiers/onSizeChanged.kt
@@ -1,8 +1,10 @@
 package org.jetbrains.compose.common.ui.layout
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.ui.unit.IntSize
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.onSizeChanged(
     onSizeChanged: (IntSize) -> Unit
 ): Modifier {
diff --git a/web/widgets/src/jsMain/kotlin/modifiers/size.kt b/web/widgets/src/jsMain/kotlin/modifiers/size.kt
index d4ae66c24a..e5979fcb37 100644
--- a/web/widgets/src/jsMain/kotlin/modifiers/size.kt
+++ b/web/widgets/src/jsMain/kotlin/modifiers/size.kt
@@ -6,6 +6,7 @@ import org.jetbrains.compose.web.css.height
 import org.jetbrains.compose.web.css.px
 import org.jetbrains.compose.common.internal.castOrCreate
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.size(width: Dp, height: Dp): Modifier = castOrCreate().apply {
     add {
         width(width.value.px)
diff --git a/web/widgets/src/jsMain/kotlin/modifiers/width.kt b/web/widgets/src/jsMain/kotlin/modifiers/width.kt
index fdb9d815c5..e9343ecbb8 100644
--- a/web/widgets/src/jsMain/kotlin/modifiers/width.kt
+++ b/web/widgets/src/jsMain/kotlin/modifiers/width.kt
@@ -3,9 +3,11 @@ package org.jetbrains.compose.common.foundation.layout
 import org.jetbrains.compose.common.ui.unit.Dp
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.internal.castOrCreate
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.web.css.px
 import org.jetbrains.compose.web.css.width
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.width(size: Dp): Modifier = castOrCreate().apply {
     add {
         width(size.value.px)
diff --git a/web/widgets/src/jvmMain/kotlin/Alignment.kt b/web/widgets/src/jvmMain/kotlin/Alignment.kt
index 69aed3bca9..13e866f95b 100644
--- a/web/widgets/src/jvmMain/kotlin/Alignment.kt
+++ b/web/widgets/src/jvmMain/kotlin/Alignment.kt
@@ -2,6 +2,7 @@ package org.jetbrains.compose.common.ui
 
 import androidx.compose.ui.Alignment as JAlignment
 
+@ExperimentalComposeWebWidgetsApi
 val Alignment.Vertical.implementation: JAlignment.Vertical
     get() = when (this) {
         Alignment.Top -> JAlignment.Top
diff --git a/web/widgets/src/jvmMain/kotlin/Arrangement.kt b/web/widgets/src/jvmMain/kotlin/Arrangement.kt
index 823be7b5ba..8b9f6281b1 100644
--- a/web/widgets/src/jvmMain/kotlin/Arrangement.kt
+++ b/web/widgets/src/jvmMain/kotlin/Arrangement.kt
@@ -1,7 +1,9 @@
 package org.jetbrains.compose.common.foundation.layout
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import androidx.compose.foundation.layout.Arrangement as JArrangement
 
+@ExperimentalComposeWebWidgetsApi
 val Arrangement.Horizontal.implementation: JArrangement.Horizontal
     get() = when (this) {
         Arrangement.End -> JArrangement.End
diff --git a/web/widgets/src/jvmMain/kotlin/Color.kt b/web/widgets/src/jvmMain/kotlin/Color.kt
index 064a379c88..36c8454937 100644
--- a/web/widgets/src/jvmMain/kotlin/Color.kt
+++ b/web/widgets/src/jvmMain/kotlin/Color.kt
@@ -1,6 +1,8 @@
 package org.jetbrains.compose.common.core.graphics
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import androidx.compose.ui.graphics.Color as JColor
 
+@ExperimentalComposeWebWidgetsApi
 val Color.implementation
     get() = JColor(red, green, blue)
diff --git a/web/widgets/src/jvmMain/kotlin/Modifier.kt b/web/widgets/src/jvmMain/kotlin/Modifier.kt
index cb5ee2ff6c..7f7a29945b 100644
--- a/web/widgets/src/jvmMain/kotlin/Modifier.kt
+++ b/web/widgets/src/jvmMain/kotlin/Modifier.kt
@@ -8,13 +8,16 @@ import org.jetbrains.compose.common.core.graphics.implementation
 import org.jetbrains.compose.common.internal.castOrCreate
 import androidx.compose.foundation.layout.padding
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.background(color: Color): Modifier = castOrCreate().apply {
     modifier = modifier.background(color.implementation)
 }
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.padding(all: Dp): Modifier = castOrCreate().apply {
     modifier = modifier.padding(all.implementation)
 }
 
+@ExperimentalComposeWebWidgetsApi
 val Modifier.implementation
     get() = castOrCreate().modifier
diff --git a/web/widgets/src/jvmMain/kotlin/internal/ActualModifier.kt b/web/widgets/src/jvmMain/kotlin/internal/ActualModifier.kt
index 854a7daf5a..3f7834b540 100644
--- a/web/widgets/src/jvmMain/kotlin/internal/ActualModifier.kt
+++ b/web/widgets/src/jvmMain/kotlin/internal/ActualModifier.kt
@@ -1,12 +1,15 @@
 package org.jetbrains.compose.common.internal
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import androidx.compose.ui.Modifier as JModifier
 import org.jetbrains.compose.common.ui.Modifier
 
 private class ModifierElement : JModifier.Element
 
+@ExperimentalComposeWebWidgetsApi
 class ActualModifier : Modifier {
     var modifier: JModifier = ModifierElement()
 }
 
+@ExperimentalComposeWebWidgetsApi
 fun Modifier.castOrCreate(): ActualModifier = (this as? ActualModifier) ?: ActualModifier()
diff --git a/web/widgets/src/jvmMain/kotlin/layouts/box.kt b/web/widgets/src/jvmMain/kotlin/layouts/box.kt
index aba1b9b74c..042118185b 100644
--- a/web/widgets/src/jvmMain/kotlin/layouts/box.kt
+++ b/web/widgets/src/jvmMain/kotlin/layouts/box.kt
@@ -3,11 +3,13 @@ package org.jetbrains.compose.common.foundation.layout
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.ui.implementation
 import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import androidx.compose.foundation.layout.Box as JBox
 
 @Composable
+@ExperimentalComposeWebWidgetsApi
 internal actual fun BoxActual(modifier: Modifier, content: @Composable () -> Unit) {
     JBox(modifier.implementation) {
         content.invoke()
     }
-}
\ No newline at end of file
+}
diff --git a/web/widgets/src/jvmMain/kotlin/layouts/button.kt b/web/widgets/src/jvmMain/kotlin/layouts/button.kt
index 9c177d87bb..6bbbd7d42b 100644
--- a/web/widgets/src/jvmMain/kotlin/layouts/button.kt
+++ b/web/widgets/src/jvmMain/kotlin/layouts/button.kt
@@ -2,11 +2,13 @@ package org.jetbrains.compose.common.material
 
 import org.jetbrains.compose.common.ui.Modifier
 import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.implementation
 import androidx.compose.material.Button as JButton
 
 @Composable
-actual fun ButtonActual(
+@ExperimentalComposeWebWidgetsApi
+internal actual fun ButtonActual(
     modifier: Modifier,
     onClick: () -> Unit,
     content: @Composable () -> Unit
diff --git a/web/widgets/src/jvmMain/kotlin/layouts/column.kt b/web/widgets/src/jvmMain/kotlin/layouts/column.kt
index 7438ccb4ee..65d3f8fe8c 100644
--- a/web/widgets/src/jvmMain/kotlin/layouts/column.kt
+++ b/web/widgets/src/jvmMain/kotlin/layouts/column.kt
@@ -2,12 +2,14 @@ package org.jetbrains.compose.common.foundation.layout
 
 import org.jetbrains.compose.common.ui.Modifier
 import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import androidx.compose.foundation.layout.Column as JColumn
 import org.jetbrains.compose.common.ui.implementation
 
 @Composable
+@ExperimentalComposeWebWidgetsApi
 internal actual fun ColumnActual(modifier: Modifier, content: @Composable () -> Unit) {
     JColumn(modifier = modifier.implementation) {
         content.invoke()
     }
-}
\ No newline at end of file
+}
diff --git a/web/widgets/src/jvmMain/kotlin/layouts/row.kt b/web/widgets/src/jvmMain/kotlin/layouts/row.kt
index 6975fe281f..e9b1763edc 100644
--- a/web/widgets/src/jvmMain/kotlin/layouts/row.kt
+++ b/web/widgets/src/jvmMain/kotlin/layouts/row.kt
@@ -1,13 +1,11 @@
 package org.jetbrains.compose.common.foundation.layout
 
-import org.jetbrains.compose.common.ui.Modifier
 import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.*
 import androidx.compose.foundation.layout.Row as JRow
-import org.jetbrains.compose.common.ui.implementation
-import org.jetbrains.compose.common.ui.implementation
-import org.jetbrains.compose.common.ui.Alignment
 
 @Composable
+@ExperimentalComposeWebWidgetsApi
 internal actual fun RowActual(
     modifier: Modifier,
     horizontalArrangement: Arrangement.Horizontal,
@@ -21,4 +19,4 @@ internal actual fun RowActual(
     ) {
         content.invoke()
     }
-}
\ No newline at end of file
+}
diff --git a/web/widgets/src/jvmMain/kotlin/layouts/shapes/shapes.kt b/web/widgets/src/jvmMain/kotlin/layouts/shapes/shapes.kt
index 1c165edeb1..77e69723ad 100644
--- a/web/widgets/src/jvmMain/kotlin/layouts/shapes/shapes.kt
+++ b/web/widgets/src/jvmMain/kotlin/layouts/shapes/shapes.kt
@@ -1,8 +1,10 @@
 package jetbrains.compose.common.shapes
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import androidx.compose.ui.graphics.Shape as JShape
 import androidx.compose.foundation.shape.CircleShape as JCircleShape
 
+@ExperimentalComposeWebWidgetsApi
 val Shape.implementation: JShape
     get() = when (this) {
         CircleShape -> JCircleShape
diff --git a/web/widgets/src/jvmMain/kotlin/layouts/slider.kt b/web/widgets/src/jvmMain/kotlin/layouts/slider.kt
index e8566af74c..52c9355ce2 100644
--- a/web/widgets/src/jvmMain/kotlin/layouts/slider.kt
+++ b/web/widgets/src/jvmMain/kotlin/layouts/slider.kt
@@ -1,12 +1,14 @@
 package org.jetbrains.compose.common.material
 
 import androidx.compose.runtime.Composable
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.Modifier
 import androidx.compose.material.Slider as JSlider
 import org.jetbrains.compose.common.ui.implementation
 
 @Composable
-actual fun SliderActual(
+@ExperimentalComposeWebWidgetsApi
+internal actual fun SliderActual(
     value: Float,
     onValueChange: (Float) -> Unit,
     valueRange: ClosedFloatingPointRange<Float>,
diff --git a/web/widgets/src/jvmMain/kotlin/layouts/text.kt b/web/widgets/src/jvmMain/kotlin/layouts/text.kt
index 5fb5ef03a6..fd969d9833 100644
--- a/web/widgets/src/jvmMain/kotlin/layouts/text.kt
+++ b/web/widgets/src/jvmMain/kotlin/layouts/text.kt
@@ -6,11 +6,13 @@ import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.ui.implementation
 import org.jetbrains.compose.common.core.graphics.Color
 import org.jetbrains.compose.common.core.graphics.implementation
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.unit.TextUnit
 import org.jetbrains.compose.common.ui.unit.implementation
 
 @Composable
-actual fun TextActual(
+@ExperimentalComposeWebWidgetsApi
+internal actual fun TextActual(
     text: String,
     modifier: Modifier,
     color: Color,
diff --git a/web/widgets/src/jvmMain/kotlin/modifiers/border.kt b/web/widgets/src/jvmMain/kotlin/modifiers/border.kt
index cba0b81959..fc05a618da 100644
--- a/web/widgets/src/jvmMain/kotlin/modifiers/border.kt
+++ b/web/widgets/src/jvmMain/kotlin/modifiers/border.kt
@@ -7,7 +7,9 @@ import org.jetbrains.compose.common.internal.castOrCreate
 import org.jetbrains.compose.common.core.graphics.implementation
 import org.jetbrains.compose.common.ui.unit.implementation
 import androidx.compose.foundation.border
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.border(size: Dp, color: Color): Modifier = castOrCreate().apply {
     modifier = modifier.border(size.implementation, color.implementation)
 }
diff --git a/web/widgets/src/jvmMain/kotlin/modifiers/clickable.kt b/web/widgets/src/jvmMain/kotlin/modifiers/clickable.kt
index aa5cc78293..39e88f85fe 100644
--- a/web/widgets/src/jvmMain/kotlin/modifiers/clickable.kt
+++ b/web/widgets/src/jvmMain/kotlin/modifiers/clickable.kt
@@ -3,7 +3,9 @@ package org.jetbrains.compose.common.foundation
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.internal.castOrCreate
 import androidx.compose.foundation.clickable
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.clickable(onClick: () -> Unit): Modifier = castOrCreate().apply {
     modifier = modifier.clickable(onClick = onClick)
 }
diff --git a/web/widgets/src/jvmMain/kotlin/modifiers/clip.kt b/web/widgets/src/jvmMain/kotlin/modifiers/clip.kt
index cbcad05e65..582781dcd9 100644
--- a/web/widgets/src/jvmMain/kotlin/modifiers/clip.kt
+++ b/web/widgets/src/jvmMain/kotlin/modifiers/clip.kt
@@ -5,7 +5,9 @@ import jetbrains.compose.common.shapes.Shape
 import jetbrains.compose.common.shapes.implementation
 import org.jetbrains.compose.common.internal.castOrCreate
 import androidx.compose.ui.draw.clip
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.clip(shape: Shape): Modifier = castOrCreate().apply {
     modifier = modifier.clip(shape.implementation)
 }
diff --git a/web/widgets/src/jvmMain/kotlin/modifiers/fillMaxHeight.kt b/web/widgets/src/jvmMain/kotlin/modifiers/fillMaxHeight.kt
index e0d3b2c92b..a4309f8b3b 100644
--- a/web/widgets/src/jvmMain/kotlin/modifiers/fillMaxHeight.kt
+++ b/web/widgets/src/jvmMain/kotlin/modifiers/fillMaxHeight.kt
@@ -3,7 +3,9 @@ package org.jetbrains.compose.common.foundation.layout
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.internal.castOrCreate
 import androidx.compose.foundation.layout.fillMaxHeight
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.fillMaxHeight(fraction: Float): Modifier = castOrCreate().apply {
     modifier = modifier.fillMaxHeight(fraction)
 }
diff --git a/web/widgets/src/jvmMain/kotlin/modifiers/fillMaxWidth.kt b/web/widgets/src/jvmMain/kotlin/modifiers/fillMaxWidth.kt
index 644ee8ef4e..e3936d2759 100644
--- a/web/widgets/src/jvmMain/kotlin/modifiers/fillMaxWidth.kt
+++ b/web/widgets/src/jvmMain/kotlin/modifiers/fillMaxWidth.kt
@@ -3,7 +3,9 @@ package org.jetbrains.compose.common.foundation.layout
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.internal.castOrCreate
 import androidx.compose.foundation.layout.fillMaxWidth
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.fillMaxWidth(): Modifier = castOrCreate().apply {
     modifier = modifier.fillMaxWidth()
 }
diff --git a/web/widgets/src/jvmMain/kotlin/modifiers/offset.kt b/web/widgets/src/jvmMain/kotlin/modifiers/offset.kt
index f66fff6c39..181603469d 100644
--- a/web/widgets/src/jvmMain/kotlin/modifiers/offset.kt
+++ b/web/widgets/src/jvmMain/kotlin/modifiers/offset.kt
@@ -4,8 +4,10 @@ import org.jetbrains.compose.common.ui.unit.Dp
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.internal.castOrCreate
 import androidx.compose.foundation.layout.offset
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.unit.implementation
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.offset(x: Dp, y: Dp): Modifier = castOrCreate().apply {
     modifier = modifier.offset(x.implementation, y.implementation)
 }
diff --git a/web/widgets/src/jvmMain/kotlin/modifiers/onSizeChanged.kt b/web/widgets/src/jvmMain/kotlin/modifiers/onSizeChanged.kt
index a2f4b248ba..141562f472 100644
--- a/web/widgets/src/jvmMain/kotlin/modifiers/onSizeChanged.kt
+++ b/web/widgets/src/jvmMain/kotlin/modifiers/onSizeChanged.kt
@@ -4,7 +4,9 @@ import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.ui.unit.IntSize
 import org.jetbrains.compose.common.internal.castOrCreate
 import androidx.compose.ui.layout.onSizeChanged
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.onSizeChanged(
     onSizeChanged: (IntSize) -> Unit
 ): Modifier = castOrCreate().apply {
diff --git a/web/widgets/src/jvmMain/kotlin/modifiers/size.kt b/web/widgets/src/jvmMain/kotlin/modifiers/size.kt
index 7bda262a05..8f106b6507 100644
--- a/web/widgets/src/jvmMain/kotlin/modifiers/size.kt
+++ b/web/widgets/src/jvmMain/kotlin/modifiers/size.kt
@@ -3,9 +3,9 @@ package org.jetbrains.compose.common.ui
 import org.jetbrains.compose.common.ui.unit.Dp
 import org.jetbrains.compose.common.ui.unit.implementation
 import androidx.compose.foundation.layout.size
-import org.jetbrains.compose.common.core.graphics.implementation
 import org.jetbrains.compose.common.internal.castOrCreate
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.size(width: Dp, height: Dp): Modifier = castOrCreate().apply {
     modifier = modifier.size(width.implementation, height.implementation)
 }
diff --git a/web/widgets/src/jvmMain/kotlin/modifiers/width.kt b/web/widgets/src/jvmMain/kotlin/modifiers/width.kt
index a843a08e9c..c14f849625 100644
--- a/web/widgets/src/jvmMain/kotlin/modifiers/width.kt
+++ b/web/widgets/src/jvmMain/kotlin/modifiers/width.kt
@@ -4,8 +4,10 @@ import org.jetbrains.compose.common.ui.unit.Dp
 import org.jetbrains.compose.common.ui.Modifier
 import org.jetbrains.compose.common.internal.castOrCreate
 import androidx.compose.foundation.layout.width
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import org.jetbrains.compose.common.ui.unit.implementation
 
+@ExperimentalComposeWebWidgetsApi
 actual fun Modifier.width(size: Dp): Modifier = castOrCreate().apply {
     modifier = modifier.width(size.implementation)
 }
diff --git a/web/widgets/src/jvmMain/kotlin/units/Dp.kt b/web/widgets/src/jvmMain/kotlin/units/Dp.kt
index 5fdfbbc4e2..3e3c08bb26 100644
--- a/web/widgets/src/jvmMain/kotlin/units/Dp.kt
+++ b/web/widgets/src/jvmMain/kotlin/units/Dp.kt
@@ -1,6 +1,8 @@
 package org.jetbrains.compose.common.ui.unit
 
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 import androidx.compose.ui.unit.Dp as JDp
 
+@ExperimentalComposeWebWidgetsApi
 val Dp.implementation: JDp
-    get() = JDp(value)
\ No newline at end of file
+    get() = JDp(value)
diff --git a/web/widgets/src/jvmMain/kotlin/units/TextUnit.kt b/web/widgets/src/jvmMain/kotlin/units/TextUnit.kt
index d7c4e9695d..032923cb67 100644
--- a/web/widgets/src/jvmMain/kotlin/units/TextUnit.kt
+++ b/web/widgets/src/jvmMain/kotlin/units/TextUnit.kt
@@ -3,7 +3,9 @@ package org.jetbrains.compose.common.ui.unit
 import androidx.compose.ui.unit.TextUnit as JTextUnit
 import androidx.compose.ui.unit.em
 import androidx.compose.ui.unit.sp
+import org.jetbrains.compose.common.ui.ExperimentalComposeWebWidgetsApi
 
+@ExperimentalComposeWebWidgetsApi
 val TextUnit.implementation: JTextUnit
     get() = when (unitType) {
         TextUnitType.Em -> (value).em