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How to write the vue.js menu component: first use [index.html] to write the entry page; then use the [clickoutside.js] drop-down box component, the code is [Vue.directive('clickoutside']; Finally, the style sheet is implemented.
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The operating environment of this tutorial: windows7 system, Vue2 .9.6 version, this method is applicable to all brands of computers.
How to write the vue.js menu component:
1. Entry page 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">
<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/vue/dist/vue.js"></script>
<script src="clickoutside.js"></script>
<script src="index.js"></script>
</body>
</html>2. Root instance index.js
var app = new Vue({
el: '#app',
data: {
show: false
},
methods: {
handleClose () {
this.show = false;
}
}
});3. Drop-down box component 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. Style sheet
[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;
}Related free learning recommendations: JavaScript (video)
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