写出vue.js菜单组件的方法：首先使用【index.html】编写入口页面；然后使用【clickoutside.js】下拉框组件，代码为【vue.directive('clickoutside'】；最后实现样式表。
【相关文章推荐：vue.js】
本教程操作环境：windows7系统、Vue2.9.6版，该方法适用于所有品牌电脑。
写出vue.js菜单组件的方法：
1、入口页面 index.html
<!DOCTYPE html>
<html>
<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 v-clickoutside="handleClose">
<button @click="show = !show">点击显示下拉菜单</button>
<div v-show="show">
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<div class="artcardd flexRow">
<a class="aritcle_card_img" href="/ai/1299" title="AI-Text-Classifier"><img
src="https://img.php.cn/upload/ai_manual/001/431/639/68b6d8da19dda890.png" alt="AI-Text-Classifier" onerror="this.onerror='';this.src='/static/lhimages/moren/morentu.png'" ></a>
<div class="aritcle_card_info flexColumn">
<a href="/ai/1299" title="AI-Text-Classifier">AI-Text-Classifier</a>
<p>OpenAI官方出品，可以区分人工智能书写的文本和人类书写的文本</p>
</div>
<a href="/ai/1299" title="AI-Text-Classifier" class="aritcle_card_btn flexRow flexcenter"><b></b><span>下载</span> </a>
</div>
</div>
</div>
</div>
</div>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<script src="clickoutside.js"></script>
<script src="index.js"></script>
</body>
</html>2、根实例 index.js
var app = new Vue({
el: '#app',
data: {
show: false
},
methods: {
handleClose () {
this.show = false;
}
}
});3、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__;
}
});4、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;
}相关免费学习推荐：JavaScript（视频）
