我用Polymer构建了一个web组件，它适用于除IE11之外的所有浏览器 . 我已经尝试了一切，但无法弄清楚为什么它不起作用 .
附上是代码，你能帮我找出原因吗？它仍然在装载 .
<!DOCTYPE html><html lang="en"><head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, minimum-scale=1, initial scale=1, user-scalable=yes">
<title>wc test</title>
<link rel="manifest" href="/manifest.json">
<script src="/node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
<script>if(!window.customElements){document.write("<!--")}</script>
<script type="text/javascript" src="/node_modules/@webcomponents/webcomponentsjs/custom-elements-es5-adapter.js"></script>
<!-- do not remove -->
<script src="/node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
<script type="module" src="/src/klantenvertellen-app/klantenvertellen-app.js"></script>
</head>
<body>
<klantenvertellen-app>Loading...</klantenvertellen-app>
</body>
</html>