绑定事件

• 点击事件

  <div id="app">
      <button v-on:click="hello">hello</button>
  </div>
  
  
  <script src="https://cdn.jsdelivr.net/npm//dist/vue.min.js"></script>
  <script>
      var vm = new Vue({
          el: "#app",
          data: {
              message: "hello vue"
          },
          methods: {
              hello: function () {
                  alert(this.message)
              }
          }
      });
  </script>

• 双向绑定显示输入的数据

  <div id="app">
      请输入:<input type="text" v-model="message">{{message}}
  </div>
  
  <script src="https://cdn.jsdelivr.net/npm//dist/vue.min.js"></script>
  <script>
      var vm = new Vue({
          el: "#app",
          data: {
              message: ""
          }
      });
  </script>

• 单选框和下拉框

  <div id="app">
      单选框:
      <br/>
      选择你喜欢的水果:
      <input type="radio" name="fruits" value="苹果" v-model="fav">苹果
      <input type="radio" name="fruits" value="香蕉" v-model="fav">香蕉
      <input type="radio" name="fruits" value="桃子" v-model="fav">桃子
      <br/><br/>
      下拉框:
      <br/>
      选择你喜欢的水果:
      <select name="fruits" v-model="fav">
  <!--        <option value="" disabled>请选择</option>-->
          <option>苹果</option>
          <option>香蕉</option>
          <option>桃子</option>
      </select>
      <p>
          被选中的水果:{{fav}}
      </p>
  </div>
  
  
  <script src="https://cdn.jsdelivr.net/npm//dist/vue.min.js"></script>
  <script>
      var vm = new Vue({
          el: "#app",
          data: {
              fav: "",
          }
      });
  </script>