now project is multiplatform and correctly working

src/jsMain/kotlin/dev/inmo/jsuikit/elements/Dropdown.kt

@@ -0,0 +1,48 @@
+package dev.inmo.jsuikit.elements
+
+import androidx.compose.runtime.Composable
+import dev.inmo.jsuikit.buildAndAddAttribute
+import dev.inmo.jsuikit.modifiers.*
+import dev.inmo.jsuikit.utils.Milliseconds
+import org.jetbrains.compose.web.dom.*
+import org.w3c.dom.HTMLDivElement
+
+@Composable
+fun Dropdown(
+    vararg modifiers: UIKitModifier,
+    toggle: String? = null,
+    pos: UIKitDropdown.Position? = null,
+    mode: UIKitDropdown.Mode? = null,
+    delayShow: Milliseconds? = null,
+    delayHide: Milliseconds? = null,
+    boundary: String? = null,
+    boundaryAlign: Boolean? = null,
+    flip: UIKitDropdown.Flip? = null,
+    offset: Int? = null,
+    animation: UIKitAnimation? = null,
+    duration: Milliseconds? = null,
+    attributesCustomizer: AttrBuilderContext<HTMLDivElement> = {},
+    contentBuilder: ContentBuilder<HTMLDivElement>
+) {
+    Div(
+        {
+            buildAndAddAttribute("uk-dropdown") {
+                "toggle" to toggle
+                "pos" to pos
+                "mode" to mode
+                "delayShow" to delayShow
+                "delayHide" to delayHide
+                "boundary" to boundary
+                "boundaryAlign" to boundaryAlign
+                "flip" to flip
+                "offset" to offset
+                "animation" to animation
+                "duration" to duration
+            }
+            classes("uk-dropdown")
+            include(*modifiers)
+            attributesCustomizer()
+        },
+        contentBuilder
+    )
+}