Todolist案例（vue版）

组件中代码

<template>
  <div>
    <section class="todoapp">
      <header class="header">
        <h1>todos</h1>
        <input
          class="new-todo"
          autofocus
          placeholder="What needs to be done?"
          v-model="val"
          @keyup.enter="add"
        />
      </header>
      <section class="main" v-cloak>
        <input id="toggle-all" class="toggle-all" type="checkbox" v-model="select"/>
        <label for="toggle-all" v-show="list.length!=0" ></label>
        <ul class="todo-list">
          <li class="todo checked " v-for="(item,index) in showList" :key="item.id">
            <div class="view">
              <input class="toggle" type="checkbox" v-model="item.finished"/>
              <label :class="{'completed':item.finished}">{
  {item.title}}</label>
              <button class="destroy" @click="remove(index)"></button>
            </div>
          </li>
        </ul>
      </section>
      <footer class="footer" v-show="list.length!=0">
        <span class="todo-count"> <strong> {
  {num}} </strong> {
  {num | numFilter}} left</span>
        <ul class="filters">
          <li @click="status='all'">
            <a href="#" :class="{'selected':status=='all'}">All</a>
          </li>
          <li  @click="status='no'">
            <a href="#"  :class="{'selected':status=='no'}">Active</a>
          </li>
          <li  @click="status='yes'">
            <a href="#"  :class="{'selected':status=='yes'}">Completed</a>
          &l