Better fix for tests

Author: jscheid

examples/issue-154/index.js

@@ -1,6 +1,6 @@
 import "./style.css";
 
-window.addEventListener("DOMContentLoaded", () => {
+window.addEventListener("load", () => {
   console.log(
     getComputedStyle(document.body).background.match(/rgb\(255, 0, 0\)/)
       ? "ok"