vue ---v-bind 高级用法

<!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">
  <title>Document</title>
  <style>
    .active {
      color: pink;
    }
  </style>
  <script src="../vue.js"></script>
</head>

<body>
  <div id="app">
    <h2 class="active">{{message}}</h2>
    <h2 :class="{active: isActive}" @click="change">{{message}}</h2>
  </div>
  <script>
    const app = new Vue({
      el: "#app",
      data: {
        message: "hello",
        active: "active",
        isActive: "true"
      },
      methods: {
        change() {
          this.isActive = !this.isActive;
        }
      }
    })
  </script>
</body>

</html>
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