使用flag标识符结合v-if和v-else切换组件

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <link href="https://cdn.jsdelivr.net/npm/animate.css@3.5.1" rel="stylesheet" type="text/css">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <input type="button" value="toggle" @click="flag=!flag">
        <my-com1 v-if="flag"></my-com1>
        <my-com2 v-else="flag"></my-com2>
    </div>
    <script>

    Vue.component('myCom1', {
      template: '<h3>我是007</h3>'
    })

    Vue.component('myCom2', {
      template: '<h3>我是009</h3>'
    })

      var vm = new Vue({
        el: '#app',
        data: {
          flag: true
        },
        methods: {},
      });
    </script>
</body>
</html>

效果展示：
在这里插入图片描述

使用:is属性来切换不同的子组件,并添加切换动画

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <link href="https://cdn.jsdelivr.net/npm/animate.css@3.5.1" rel="stylesheet" type="text/css">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <input type="radio" v-model="gender" value="man">
        <input type="radio" v-model="gender" value="woman">
        <transition mode="out-in">
          <component :is="gender"></component>
        </transition>

        <hr>

        <input type="button" value="登录" @click="className='login'">
        <input type="button" value="注册" @click="className='register'">
        <transition mode="out-in">
          <component :is="className"></component>
        </transition>

    </div>
    <script>

    Vue.component('man', {
      template: '<h3>男</h3>'
    })

    Vue.component('woman', {
      template: '<h3>女</h3>'
    })

    Vue.component('login', {
      template: '<h3>登录</h3>'
    })

    Vue.component('register', {
      template: '<h3>注册</h3>'
    })

      var vm = new Vue({
        el: '#app',
        data: {
          gender:'man',
          className:'login'
        },
        methods: {},
      });
    </script>
</body>
</html>

效果展示：
在这里插入图片描述

可添加动画切换样式

<style>
      .v-enter,
      .v-leave-to {
        opacity: 0;
        transform: translateX(30px);
      }
  
      .v-enter-active,
      .v-leave-active {
        position: relative;
        transition: all 0.3s ease;
      }
  
      h3{
        margin: 0;
      }
    </style>
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