v-if和v-bind结合案例

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我是靠谱客的博主追寻斑马，这篇文章主要介绍v-if和v-bind结合案例，现在分享给大家，希望可以做个参考。

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<!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">
  <script src="../js/vue.js"></script>
  <title>登录切换</title>
</head>

<body>
  <div id="app">
    <span v-if="flag">
      <label for="username">用户账号:</label>
      <input type="text" id="username" placeholder="用户账号" key="username">
    </span>
    <span v-else>
      <label for="email">用户邮箱:</label>
      <input type="text" id="email" placeholder="用户邮箱" key="email">
    </span>
    <button @click="btnClick">切换类型</button>
  </div>
  <script type="text/javascript">
    const app = new Vue({
      el: '#app',
      data() {
        return {
          flag: true,
        };
      },
      computed: {

      },
      methods: {
        btnClick() {
          this.flag = !this.flag
        },
      },
    });
  </script>

  <style scoped>

  </style>

</body>

</html>