remove side-effect

Author: trueadm

packages/svelte/src/utils.js

@@ -216,11 +216,9 @@ const DOM_PROPERTIES = [
 	'srcObject'
 ];
 
-export const DOM_PROPERTIES_MAP = new Map();
-
-for (const property of DOM_PROPERTIES) {
-	DOM_PROPERTIES_MAP.set(property.toLowerCase(), property);
-}
+export const DOM_PROPERTIES_MAP = new Map(
+	DOM_PROPERTIES.map((property) => [property.toLowerCase(), property])
+);
 
 /**
  * Subset of delegated events which should be passive by default.