Vue之@click、事件修饰符@click.stop与@click.prevent、按键修饰符@keyup.enter

1、绑定监听@click:

（以监听click为例，其他如keyup，用法类似）  v-on:click="fun"
  @click="fun"
  @click="fun(参数)"

  <button @click="test1">test1</button>
  <button @click="test2('abc')">test2</button>
  <button @click="test3('abcd', $event)">test3</button>
 
  methods: {
      test1(eve) {//test1函数没有参数，默认传递 $event 
        alert(eve.target.innerHTML)  //test1
      },
      test2 (msg) { //test1函数有参数，传递该参数
        alert(msg)  // abc
      },
      test3 (msg, event) { //有参数，如果想获取到enevt，则函数中需要写 $event
        alert(msg+'---'+event.target.textContent)  // abcd---test3
      }
   }

2、@click.stop与@click.prevent

@click.stop 阻止事件冒泡

<div id="app">
        <div v-on:click="dodo">
            <button v-on:click="doThis">阻止单击事件继续传播</button>
        </div>
</div>

    <script>
        var app = new Vue({
            el: "#app",
            data: {
                name: "Vue.js"
            },
            methods: {
                doThis: function () {
                    alert("noclick");
                },
                dodo: function () {
                    alert("dodo");
                }
            }
        });
    </script>
//将会先弹出“noclick”,再弹出“dodo”。

<div id="app">
        <div v-on:click="dodo">
            <button v-on:click.stop="doThis">阻止单击事件继续传播</button>
        </div>
    </div>

    <script>
        var app = new Vue({
            el: "#app",
            data: {
                name: "Vue.js"
            },
            methods: {
                doThis: function () {
                    alert("noclick");
                },
                dodo: function () {
                    alert("dodo");
                }
            }
        });
    </script>
//只弹出“noclick”

@click.prevent 阻止事件的默认行为，

<a href="http://www.baidu.com" @click.prevent="test4">百度一下</a>   //阻止a标签跳转，仅执行函数test4

<form  action="/xxx"   @submit.prevent="test5">   //阻止表单提交，仅执行函数test5

         <input type="submit" value="注册">
</form>

3、按键修饰符

@keyup.enter

//按下enter时，执行方法test7

<input type="text" @keyup.enter="test7">

methods: {

      test7 (event) {
        console.log(event.keyCode)
        alert(event.target.value)
      }

}