vue-bind-event.html

<!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>
    <script src="./vue.js"></script>
  </head>
  <body>
    <div id="app">
      <div id="example-1">
        <button @click="counter += 1">Add 1</button>
        <p>The button above has been clicked {{counter}} times</p>
      </div>
      <div id="example-2">
        <button @click="greet">Greet</button>
      </div>
      <div id="example-3">
        <button @click="say('hi')">Say hi</button>
        <button @click="say('what')">Say what</button>
      </div>
      <div id="example-4">
        <button @click="warn('Form cannot be submitted yet', $event)"></button>
      </div>
    </div>
    <script>
      const data = { counter: 0, name: "Vue.js" };
      const vm = new Vue({
        el: "#app",
        data,
        watch: {},
        computed: {},
        methods: {
          greet: function (event) {
            // `this` 在方法里面指向当前 Vue 实例
            alert("Hello " + this.name + "!");
            // `event` 是原生 DOM 事件
            if (event) {
              alert(event.target.tagName);
            }
          },
          say: function (message) {
            alert(message);
          },
          warn: function (message, event) {
            if (event) {
              event.preventDefault();
            }
            alert(message);
          },
        },
        mounted: function () {},
      });
    </script>
  </body>
</html>