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Pen Settings

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

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Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

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Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

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Code Indentation


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If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

              <div id="app">
<!--  component ;is=で動的にコンポーネントを変えることができる  -->
  <component :is="selected">
    <!--  ボタンをクリックしたら、コンポーネントについての値、selectedを変更する
          単にjsとして処理されている。この中は -->
    <button @click="selected ='appBlack'">黒</button>
    <button @click="selected ='appWhite'">白</button>
    <!--   メインのコンポーネントにあるlabelの値を使っている   -->
    <h2 class="label" v-bind:class="fontColor"> {{ label }} </h2>
    <button @click="fontColor ='red'">赤</button>
    <button @click="fontColor ='green'">緑</button>
    <!--   バインドされている方は、コンポーネントが変わっても残る   -->
    <input v-model="label" /> バインドされてる
    <input/> バインドされてない

<!-- 黒のボトルのテンプレート -->
<script type="text/x-template" id="black">
  <div class="black">

<!-- 白のボトルのテンプレート -->
<script type="text/x-template" id="white">
  <div class="white">
  color: blue

  width: 100px
  background-color: black
  width: 100px
  background-color: white
  border: solid 1px black
  color: red
  color: green
              const app = new Vue({
  el: '#app',
  data: function() {
    return {
      selected: 'appBlack',
      label: "basic",
      fontColor: "red"
  components: {
    'appBlack': {
      template: '#black'
    'appWhite': {
      template: '#white'
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