now project is multiplatform and correctly working

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

@@ -0,0 +1,17 @@
+package dev.inmo.jsuikit.modifiers
+
+sealed class UIKitNavbar(suffix: String) : UIKitModifier {
+    override val classes: Array<String> = arrayOf("uk-navbar-$suffix")
+
+    object Transparent : UIKitNavbar("transparent")
+    sealed class Dropdown(suffix: String?) : UIKitNavbar("dropdown${suffix ?.let { "-$it" } ?: ""}") {
+        object Nav : Dropdown("nav")
+
+        companion object : Dropdown(null)
+    }
+    object Item : UIKitNavbar("item")
+
+    companion object {
+        val Logo = UIKitUtility.Logo
+    }
+}