Vue.js下拉菜单组件使用方法详解

时间:2020-05-17 吴声子夜歌人气:0

本文实例为大家分享了Vue.js下拉菜单组件的具体实现代码，供大家参考，具体内容如下

效果

#### 入口页面 index.html

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <meta http-equiv="X-UA-Compatible" content="ie=edge">
 <title>可从外部关闭的下拉菜单</title>
 <link rel="stylesheet" type="text/css" href="style.css" >
</head>
<body>
 <div id="app" v-cloak>
 <div class="main" v-clickoutside="handleClose">
  <button @click="show = !show">点击显示下拉菜单</button>
  <div class="dropdown" v-show="show">
  <p>下拉框的内容，点击外面区域可以关闭</p>
  </div>
 </div>
 </div>
 <script src="https://unpkg.com/vuehttps://img.qb5200.com/download-x/dist/vue.js"></script>
 <script src="clickoutside.js"></script>
 <script src="index.js"></script>
</body>
</html>

根实例 index.js

var app = new Vue({
 el: '#app',
 data: {
 show: false
 },
 methods: {
 handleClose () {
  this.show = false;
 }
 }
});

下拉框组件 clickoutside.js

Vue.directive('clickoutside',{
 bind: function (el, binding, vnode) {
 function documentHandler(e) {
  if(el.contains(e.target)){
  return false;
  }
  if(binding.expression){
  binding.value(e);
  }
 }
 el.__vueClickOutside__ = documentHandler;
 document.addEventListener('click',documentHandler);
 },
 unbind: function (el, binding) {
 document.removeEventListener('click', el.__vueClickOutside__);
 delete el.__vueClickOutside__;
 }
});

样式表

[v-cloak]{
 display: none;
}
.main{
 width: 125px;
}
button{
 display: block;
 width: 100%;
 color: #fff;
 background-color: #39f;
 border: 0;
 padding: 6px;
 text-align: center;
 font-size: 12px;
 border-radius: 4px;
 cursor: pointer;
 outline: none;
 position: relative;
}
button:active{
 top:1px;
 left: 1px;
}
.dropdown{
 width:100%;
 height: 150px;
 margin: 5px 0;
 font-size: 12px;
 background-color: #fff;
 border-radius: 4px;
 box-shadow: 0 1px 6px rgba(0,0,0,.2);
}
.dropdown p{
 display: inline-block;
 padding: 6px;
}

关于vue.js组件的教程，请大家点击专题vue.js组件学习教程进行学习。

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