Vue中多个元素、组件的过渡及列表过渡的方法示例

.fade-enter,
.fade-leave-to{
  opacity: 0;
}
.fade-enter-active,
.fade-leave-active{
  transition: opacity 3s;
}

<div id="root">
  <transition name="fade">
    <div v-if="show">hello world</div>
    <div v-else>bye world</div>
  </transition>
  <button @click="handleClick">切换</button>
</div>

let vm = new Vue({
  el: '#root',
  data: {
    show: true
  },
  methods: {
    handleClick() {
      this.show = !this.show
    }
  }
})

<div v-if="show" key="hello">hello world</div>
<div v-else key="bye">bye world</div>

<div id="root">
  <transition name="fade" mode="in-out">  //第一次点击时，执行顺序为：①②
    <div v-if="show">hello world</div> //再消失 ②
    <div v-else>bye world</div>    //先显示 ①
  </transition>
  <button @click="handleClick">切换</button>  
</div>

<div id="root">
  <transition name="fade" mode="out-in">  //第一次点击时，执行顺序为：①②
    <div v-if="show">hello world</div> //先消失 ①
    <div v-else>bye world</div>    //再显示 ②
  </transition>
  <button @click="handleClick">切换</button>  
</div>

.fade-enter,
.fade-leave-to{
  opacity: 0;
}
.fade-enter-active,
.fade-leave-active{
  transition: opacity 1s;
}

<div id="root">
  <transition name="fade" mode="in-out">
    <child-one v-if="show"></child-one>
    <child-two v-else></child-two>
  </transition>
  <button @click="handleClick">切换</button>
</div>

Vue.component('child-one',{
  template:'<div>child-one</div>'
})
Vue.component('child-two',{
  template:'<div>child-two</div>'
})
let vm = new Vue({
  el: '#root',
  data: {
    show: true
  },
  methods: {
    handleClick() {
      this.show = !this.show
    }
  }
})

.fade-enter,
.fade-leave-to{
  opacity: 0;
}
.fade-enter-active,
.fade-leave-active{
  transition: opacity 1s;
}

<div id="root">
  <transition-group name="fade">
    <div v-for="item of list" :key="item.id">{{item.title}}-----{{item.id}}</div>
  </transition-group>
  <button @click="handleClick">添加</button>
</div>

let vm = new Vue({
  el: '#root',
  data: {
    count:0,
    list:[]
  },
  methods: {
    handleClick() {
      this.list.push({
        id:this.count ++,
        title:'hello world'
      })
    }
  }
})

<transition-group name="fade">
  <div>hello world</div>
  <div>hello world</div>
  <div>hello world</div>
</transition-group>

<transition>
  <div>hello world</div>
</transition>
<transition>
  <div>hello world</div>
</transition>
<transition>
  <div>hello world</div>
</transition>