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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Vue中的动画封装</title>
  <script src="https://cdn.bootcss.com/vue/2.5.17-beta.0/vue.js"></script>
</head>
<body>
  <div id="app">
    <fade :show="show">
      <div>hello world</div>
    </fade>
​
    <fade :show="show">
      <h1>hello world</h1>
    </fade>
​
    <button @click="handleClick">toggle</button>
  </div>
​
  <script>
​
    Vue.component('fade',{
      props: ['show'],
      template: `
        <transition @before-enter="handleBeforeEnter"
                    @enter="handleEnter"
                    @after-enter="handleAfterEnter">
          <slot v-if="show"></slot>
        </transition>
      `,
      methods: {
        handleBeforeEnter: function(el){
          el.style.color = 'red'
        },
        handleEnter: function(el,done){
          setTimeout(() => {
            el.style.color = 'green'
          },2000)
​
          setTimeout(() => {
            done()
          },4000)
        },
        handleAfterEnter: function(el){
          el.style.color = "#000"
        }
      }
    })
​
    var vm = new Vue({
      el: "#app",
      data: {
        show: true
      },
      methods: {
        handleClick: function(){
          this.show = ! this.show
        }
      }
    })
  </script>
</body>
</html>
​
 
​
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