<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>v-if、v-else、v-show</title>
  <script src="../js/vue.js"></script>
  <!--copy from http://vuejs.org.cn/guide/-->
</head>
<body>
  <div ,
      data:{
        willShow:true
      },
      methods:{
        fn:function(){
          if(this.willShow==true){
            this.willShow=false;
          }else{
            this.willShow=true
          }
        }
      }
    });
  </script>
</body>
</html>

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