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How to implement select drop-down list through Vue.js, the specific operations are as follows
How to implement select drop-down list through Vue.js, the specific operations are as follows
Below I will share with you an example of making a select drop-down list in Vue.js (ul-li tag imitates the select tag), which has a good reference value and I hope it will be helpful to everyone.
Goal: Use the ul-li tag combined with Vue.js knowledge to make a drop-down option list that imitates the select tag.
Knowledge points:
How to write and use components
Data transfer between components (use of props)
Data transfer between components (use of $emit)
Dynamic data binding (v-bind)
Custom event communication
Rendering:
1. Before any operation is performed, the drop-down list is hidden
# #PS: In order to demonstrate the binding of two sets of data, data1 and data2, two lists are created in the example
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>ul-li模仿select下拉菜单</title>
<link rel="stylesheet" type="text/css" href="style.css" rel="external nofollow" />
<script src="https://unpkg.com/vue/dist/vue.js"></script>
</head>
<body>
<p id="demo">
<my-select btn-name='search' v-bind:list='data1' style='float: left;margin-right: 2rem;'></my-select>
<my-select btn-name='搜索' v-bind:list='data2' style='float: left;'></my-select>
</p>
</body>
</html>
<script type="text/javascript">
//注册全局组件
//在my-select组件中套用ul-select组件，my-select为父组件ul-select为子组件
Vue.component('my-select', {
//组件中data要写成函数形式
data() {
return {
ulShow: false, //默认ul不显示，单击input改变ul的显示状态
selectVal: '' //选项值，input的值与选项值动态绑定
}
},
//父组件向子组件通信用props
props: ['btnName', 'list'],
template: `
<p id="selectWrap">
<p class="searchBox">
<input type="text" :value="selectVal" @click='ulShow = !ulShow'/>
<a href="#" rel="external nofollow" class="search" v-text='btnName'></a>
</p>
<my-ul v-show='ulShow' v-bind:list='list' v-on:receive='changeVal'></my-ul>
</p>
`,
methods: {
changeVal(value) {
this.selectVal = value
}
}
})
//子组件
Vue.component('my-ul', {
props: ['list'],
template: `
<ul class="skill">
<li v-for='item of list' v-on:click='selectLi(item)'>{{item}}</li>
</ul>
`,
methods: {
selectLi: function(item) {
//$emit触发当前实例上的自定义事件 receive
this.$emit('receive', item);
}
}
})
//创建Vue实例
new Vue({
el: '#demo',
//定义两组数据分别传递到两个组件的li中，两个列表的操作互不影响
data: {
data1: ['CSS', 'HTML', 'JavaScript'],
data2: ['Vue.js', 'Node.js', 'Sass'],
}
})
</script>
ul, li {
margin: 0;
padding: 0;
list-style: none;
}
#selectWrap {
width: 250px;
padding: 2rem;
background: #4682b4;
}
.searchBox input, .searchBox a {
line-height: 1.5rem;
height: 1.5rem;
margin-bottom: 1rem;
padding: 0 5px;
vertical-align: middle;
border: 1px solid #aaa;
border-radius: 5px;
outline: none;
}
.searchBox a {
display: inline-block;
text-decoration: none;
background-color: #b1d85c;
}
.skill li {
font-size: 18px;
line-height: 2rem;
height: 2rem;
padding-left: 5px;
cursor: pointer;
}
.skill li:hover {
background-color: #008b45;
}
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Solve the query dynamic parameter passing problem in vue-routervue data transfer--I have a special Implementation skillsNodejs connection to mysql database and detailed explanation of basic knowledge pointsThe above is the detailed content of How to implement select drop-down list through Vue.js, the specific operations are as follows. For more information, please follow other related articles on the PHP Chinese website!
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