慕课在线编辑器

代码提交代码

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>
<body>
  <div id="app">
    <keep-alive include="ComponentA,ComponentB">
      <component :is="currentView"></component>
    </keep-alive>
    <button @click="changeView('A')">切换到A</button>
    <button @click="changeView('B')">切换到B</button>
    <button @click="changeView('C')">切换到C</button>
  </div>
</body>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<script type="text/javascript">
  Vue.component('ComponentA', {
    template: '<div> 组件 A </div>',
    created() {
      console.log('组件A created')
    },
    activated() {
      console.log('组件A 被添加')
    },
    deactivated() {
      console.log('组件A 被移除')
    }
  })
  Vue.component('ComponentB', {
    template: '<div> 组件 B </div>',
    created() {
      console.log('组件B created')
    },
    activated() {
      console.log('组件B 被添加')
    },
    deactivated() {
      console.log('组件B 被移除')
    }
  })
  Vue.component('ComponentC', {
    template: '<div> 组件 C </div>',
    created() {
      console.log('组件C created')
    },
    activated() {
      console.log('组件C 被添加')
    },
    deactivated() {
      console.log('组件C 被移除')
    }
  })
  var vm = new Vue({
    el: '#app',
    data() {
    	return {
        currentView: 'ComponentB'
      }
    },
    methods: {
      changeView(name) {
        this.currentView = `Component${name}`
      }
    }
  })
</script>
</html>

运行结果