now project is multiplatform and correctly working

src/jsMain/kotlin/dev/inmo/jsuikit/modifiers/UIKitModifier.kt

@@ -0,0 +1,17 @@
+package dev.inmo.jsuikit.modifiers
+
+import org.jetbrains.compose.web.attributes.AttrsBuilder
+
+interface UIKitModifier {
+    val classes: Array<String>
+        get() = emptyArray()
+    val otherAttrs: Map<String, String>
+        get() = emptyMap()
+}
+
+fun AttrsBuilder<*>.include(vararg container: UIKitModifier?) {
+    container.forEach {
+        it ?.classes ?.let { newClasses -> classes(*newClasses) }
+        it ?.otherAttrs ?.let { attrs -> attrs.forEach { (k, v) -> attr(k, v) } }
+    }
+}