Added a basic DOM diff algorithm

scripts/utils.ts

@@ -1,6 +1,8 @@
 export function* findAll(className: string) {
-	let elements = document.getElementsByClassName(className)
-
+	// getElementsByClassName failed for some reason.
+	// TODO: Test getElementsByClassName again.
+	let elements = document.querySelectorAll("." + className)
+	
 	for(let i = 0; i < elements.length; ++i) {
 		yield elements[i] as HTMLElement
 	}