js如何实现select下拉框选择
程序员文章站
2022-04-05 17:50:15
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首先来看一下效果图：
（推荐教程：js教程）
具体代码如下：
<html>
<head>
<meta charset="UTF-8">
<title>自定义select</title>
</head>
<style>
*{
margin: 0;
padding: 0;
}
#main{
position: relative;
width: 280px;
height: 42px;
}
#content{
width: 280px;
height: 42px;
line-height: 42px;
padding-left: 10px;
background: rgb(255, 255, 255);
border-radius: 2px;
border: 1px solid rgb(221, 221, 221);
font-size: 16px;
font-family: MicrosoftYaHei;
color: rgb(51, 51, 51);
cursor: pointer;
}
#selectImg{
position: absolute;
top:13px;
right: 10px;
cursor: pointer;
}
#selectItem{
display: none;
border: 1px solid #eee;
width: 290px;
}
#selectItem ul{
list-style: none;
}
#selectItem ul li{
height: 30px;
line-height: 30px;
padding-left: 10px;
cursor: pointer;
}
#selectItem ul li:hover{
background-color:#f5f7fa;
}
</style>
<body>
<div id="main">
<div id="content">
</div>
<img id="selectImg" src="./icon_select.png" alt="">
<div id="selectItem">
<!-- <ul>
<li data-value="1">北京</li>
<li data-value="2">上海</li>
<li data-value="3">深圳</li>
</ul>-->
</div>
</div>
</body>
<script>
var data = [{name:'北京',value:'1'},{name:'上海',value:'2'},{name:'广州',value:'3'}]
var content = document.getElementById('content');
var selectImg = document.getElementById('selectImg');
var selectItem = document.getElementById('selectItem');
var ul = document.createElement('ul');
selectItem.appendChild(ul);
for(var i = 0; i < data.length; i++){
var li = document.createElement('li');
li.setAttribute('data-value',data[i].value);
li.innerText = data[i].name;
ul.appendChild(li);
}
/**
* 点击下拉箭头
*/
selectImg.onclick = function () {
console.log(selectItem.style.display);
if(selectItem.style.display == 'none' || selectItem.style.display == ''){
selectItem.style.display = 'block';
}else{
selectItem.style.display = 'none';
}
}
content.onclick = function () {
if(selectItem.style.display == 'none' || selectItem.style.display == ''){
selectItem.style.display = 'block';
}else{
selectItem.style.display = 'none';
}
}
var lis = selectItem.getElementsByTagName('li');
for(var i = 0; i < lis.length; i++){
lis[i].onclick = function () {
console.log(this.innerHTML,this.getAttribute('data-value'));
content.innerText = this.innerHTML;
selectItem.style.display = 'none';
}
}
</script>
</html>
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