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.

+ add another resource


Babel is required to process package imports. If you need a different preprocessor remove all packages first.

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.

+ add another resource


Save Automatically?

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.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.


                <!DOCTYPE html>
<html lang="ja">

  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width,initial-scale=1">
  <link rel="stylesheet" href="./css/milligram.css">
  <link rel="stylesheet" href="./css/style.css">
  <title>Vue ToDo</title>

  <div id="app" class="container">

    <h1>{{ appName }}</h1>

    <input type="text" placeholder="add ToDo..." v-model="newTodoTitle" @keyup.enter="addTodo(newTodoTitle)">

    <!-- ★todo in todosからfitleredTodosに修正 -->
    <div v-for="todo in filteredTodos">
      <label :class="{done: todo.isDone}"><input type="checkbox" v-model="todo.isDone"> {{ todo.title }}</label>

    <!-- ★2. 各リンクをクリックでfilterStatusの値を変える -->
    <a href="#" @click="filterStatus='ALL'">All</a> |
    <a href="#" @click="filterStatus='WORKING'">Working</a> |
    <a href="#" @click="filterStatus='COMPLETED'">Completed</a>

    <button @click="deleteTodos">完了済みを削除</button>


  <script src="./lib/vue.js"></script>
  <script src="./js/app.js"></script>



                /* milligram.cssはHTMLコード内で読み込ませています */

.done {
  text-decoration: line-through;
  color: darkgrey;


                const app = new Vue({
  el: '#app',
  data: {
    appName: 'My Vue ToDo',
    todos: [
        title: '',
        isDone: false
    newTodoTitle: '',
    filterStatus: '' // ★1 ステータス管理用の変数を用意する
  computed: {
    // ★ filterStatusに基づいた配列を返す
    filteredTodos: function() {
      switch (this.filterStatus) {
        case 'WORKING':
          return this.todos.filter((todo) => {return todo.isDone === false})
        case 'COMPLETED':
          return this.todos.filter((todo) => {return todo.isDone === true})
          return this.todos
  methods: {
    addTodo: function (title) {

      const newTodo = {
        title: title,
        isDone: false

      this.newTodoTitle = '';
    deleteTodos: function () {

      const deletedTodos = this.todos.filter(function (todo) {
        if (todo.isDone === false) return true;

      this.todos = deletedTodos;
    saveTodoToStorage: function () {
      localStorage.setItem('todos', JSON.stringify(this.todos));
    readTodoFromStorage: function () {
      this.todos = JSON.parse(localStorage.getItem('todos'));
      if (!this.todos) { this.todos = [] }
  mounted: function () {