core/packages-private/template-explorer/index.html

<title>Vue Template Explorer</title>
<link
  rel="stylesheet"
  data-name="vs/editor/editor.main"
  href="https://unpkg.com/monaco-editor@0.20.0/min/vs/editor/editor.main.css"
/>
<link rel="stylesheet" href="./style.css" />

<div id="header"></div>
<div id="source" class="editor"></div>
<div id="output" class="editor"></div>

<script src="https://unpkg.com/monaco-editor@0.20.0/min/vs/loader.js"></script>
<script>
  require.config({
    paths: {
      vs: 'https://unpkg.com/monaco-editor@0.20.0/min/vs',
    },
  })
</script>
<script src="./dist/template-explorer.global.js"></script>
<script>
  require(['vs/editor/editor.main'], init /* injected by build */)
</script>