Vue之TodoList案例详解

<template>  <div id="root">    <div class="todo-container">      <div class="todo-wrap">        <Top :received="received" />        <List :todos="todos" :checkTodo="checkTodo" :deleteTodo="deleteTodo" />        <Bottom :todos="todos" :checkAllTodo="checkAllTodo" :clearAllTodo="clearAllTodo" />      </div>    </div>  </div></template><script>  import Top from './components/Top.vue'  import Bottom from './components/Bottom.vue'  import List from './components/List.vue'  export default {    name: 'App',    components: {      Top,      List,      Bottom    },    data() {      return {        todos: [{            id: '001',            title: '吃饭',            done: true          },          {            id: '002',            title: '睡觉',            done: false          },          {            id: '003',            title: '打豆豆',            done: false          },        ]      }    },    methods: {      //添加一个todo      received(todoObj) {        this.todos.unshift(todoObj);      },      //取消勾选todo      checkTodo(id) {        this.todos.forEach((todo) => {          //函数体          if (todo.id === id) todo.done = !todo.done;        })      },      //删除      deleteTodo(id) {        this.todos = this.todos.filter(todo => todo.id !== id)      },      //全选 全不选      checkAllTodo(done) {        this.todos.forEach((todo) => {          todo.done = done        })      },      //清除所有已经完成的数据      clearAllTodo() {        this.todos = this.todos.filter((todo) => {          return !todo.done        })      }    }  }</script><style lang="css">  /*base*/  body {    background: #fff;  }  .btn {    display: inline-block;    padding: 4px 12px;    margin-bottom: 0;    font-size: 14px;    line-height: 20px;    text-align: center;    vertical-align: middle;    cursor: pointer;    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);    border-radius: 4px;  }  .btn-danger {    color: #fff;    background-color: #da4f49;    border: 1px solid #bd362f;  }  .btn-danger:hover {    color: #fff;    background-color: #bd362f;  }  .btn:focus {    outline: none;  }  .todo-container {    width: 600px;    margin: 0 auto;  }  .todo-container .todo-wrap {    padding: 10px;    border: 1px solid #ddd;    border-radius: 5px;  }</style>