<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Vue中多個元素或組件的過渡</title> <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> <style> .v-enter, .v-leave-to { opacity: 0; } .v-enter-active, .v-leave-active { transition: opacity 1s; } </style> </head> <body> <div id="root"> <transition mode="out-in"> <div v-if="show" key="name">Harold</div> <div v-else key="hello">Hello</div> </transition> <button @click="handleClick">toggle</button> <transition mode="out-in"> <child v-if="show"></child> <child-one v-else></child-one> </transition> <hr /> <transition mode="in-out"> <component :is="type"></component> </transition> </div> <script type="text/javascript"> Vue.component('child', { template: '<div>child</div>' }) Vue.component('child-one', { template: '<div>child-one</div>' }) var rm = new Vue({ el: '#root', data: { show: true, type: 'child', }, methods: { handleClick() { this.show = !this.show; this.type = this.type === 'child' ? 'child-one' : 'child'; } } }) </script> </body> </html>