Home > Article > Web Front-end > Native js implementation of drop-down list box

Native js implementation of drop-down list box

韦小宝Original: 2017-11-17 14:53:393070browse

Imitateqq listClick the drop-down,jsNative implementation,Free source codeprovides research, take it! Follow PHP中文网 to give you more interesting things!

Code:

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>PHP中文网--下拉框</title>
<style>
ul , h2 { padding:0; margin:0; }
li { list-style:none; }
#list { width:240px; border:1px solid #333; margin:0 auto; }
#list .lis {}
#list h2 { height:30px; line-height:30px; text-indent:20px; background:yellow; color:#000; }
#list .active { background:orange; color:#000; }
#list ul { display:none; }
#list ul li { line-height:24px; border-bottom:1px solid #333; text-indent:24px; }
#list ul .hover { background:pink; }
</style>
<script>
window.onload = function (){
	var oUl = document.getElementById(&#39;list&#39;);
	var aH2 = oUl.getElementsByTagName(&#39;h2&#39;);
	var aUl = oUl.getElementsByTagName(&#39;ul&#39;);
	var aLi = null;
	var arrLi = [];
	for(var i=0;i<aH2.length;i++){
		aH2[i].index=i;
		aH2[i].onclick = function(){
			for(var i=0;i<aH2.length;i++){
				if(aH2[i] !=this){
					aUl[i].style.display=&#39;none&#39;;
					aH2[i].className=&#39;&#39;;
				}
			}
			if(this.className==&#39;&#39;){
				aUl[this.index].style.display=&#39;block&#39;;
				this.className=&#39;active&#39;;
			}else{
				aUl[this.index].style.display=&#39;none&#39;;
				this.className=&#39;&#39;;
			}
		};
	}
	for(var i=0;i<aUl.length;i++){
		aLi = aUl[i].getElementsByTagName(&#39;li&#39;);
		for(var j=0;j<aLi.length;j++){
			arrLi.push(aLi[j]);
		}
	}
	for(var i=0;i<arrLi.length;i++){
		arrLi[i].onclick=function(){
			for(var i=0;i<arrLi.length;i++){
				if(arrLi[i] !=this){
					arrLi[i].className=&#39;&#39;;
				}
			}
			if(this.className==&#39;&#39;){
				this.className=&#39;hover&#39;;
			}else{
				this.className=&#39;&#39;;
			}
		};
	}
};
</script>
</head>

<body>

<ul id="list" style="margin-top:50px;">
	<li class="lis">
  	<h2>我的好友</h2>
    <ul>
    	<li>a111</li>
    	<li>a222</li>
    	<li>a333</li>
    	<li>a444</li>
    </ul>
  </li>
	<li class="lis">
  	<h2>陌生人</h2>
    <ul>
    	<li>b111</li>
    	<li>b222</li>
    	<li>b333</li>
    	<li>b444</li>
    	<li>b555</li>
    </ul>
  </li>
	<li class="lis">
  	<h2>黑名单</h2>
    <ul>
    	<li>c111</li>
    	<li>c222</li>
    </ul>
  </li>
</ul>

</body>
</html>

Get it for free and study it! More good source codes are available on PHP Chinese website, follow us and give you a good look~

Related recommendations:

css, js dice lottery source code

html moving puppy source code

js original sound Implementing a simple WeChat chat function

The above is the detailed content of Native js implementation of drop-down list box. For more information, please follow other related articles on the PHP Chinese website!

Statement：

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Previous article：js to convert html to pdfNext article：js to convert html to pdf

See more

Native js implementation of drop-down list box

Related articles