Vue.js实战
可从外部关闭的下拉菜单
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>可从外部关闭的下拉菜单</title>
<script src="https://unpkg.com/vue/dist/vue.min.js"></script>
<style>
[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;
}
</style>
</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>
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__;
}
});
</script>
<script>
var app = new Vue({
el: "#app",
data: {
show: false
},
methods: {
handleClose: function () {
this.show = false;
}
},
});
</script>
</body>
</html>
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