用html+css+js实现一个无限级树形控件
主要参考：https://blog.csdn.net/cc_fys/article/details/81284638
增加内容：在页面上显示所选叶子节点的文本，便于向后台发送。
<!DOCTYPE html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>树形菜单示例</title>
<style type="text/css">
ul>li{
list-style: none;
}
/* 可展开*/
.switch-open
{
margin-left:-12px;
border:6px solid red; /* transparent*/
display:inline-block;
width:0px;
height:0px;
border-top-color: black;
}
/* 展开完毕*/
.switch-close
{
margin-left:-12px;
border:6px solid transparent;
display:inline-block;
width:0px;
height:0px;
border-left-color: black;
margin-bottom: 2px;
}
/* 改变CheckBox样式*/
input[type='checkbox']{
width: 30px; /* 20px*/
height: 20px;
-webkit-appearance:none;
-moz-appearance: none;
border: 1px solid #c9c9c9;
border-radius: 3px;
outline: none;
color:white;
text-align: center;
}
input[type='checkbox']:before
{
content: '√ ';
color:transparent;
}
input[type=checkbox]:checked{
background-color: #30add6;
}
input[type=checkbox]:checked:before{
content: '√';
color:white;
font-weight: bold;
}
</style>
</head>
<body>
<div class="warp">
<ul id="container">
</ul>
</div>
选择的叶子节点是：<span id="sp"></span><br/>
<script type="text/javascript">
Array.prototype.remove = function(val) {
var index = this.indexOf(val);
if (index > -1) {
this.splice(index, 1);
}
};
//结构
var json={
'A':{
'B':null,
'C':{
'd':null,
'e':null,
'f':null
},
'g':null
},
'h':{
'i':null,
'j':null
},
'k':null
};
//这里生成DOM
function generate(json,par)
{
for(var attr in json)
{
var ele=document.createElement('li');
if(!json[attr])
ele.innerHTML=' <input type="checkbox" onclick="sel(this)" data-leaf="'+attr+'"></input>'+attr;
else
{
ele.innerHTML='<span><span class="switch-open" onclick="toggle(this)"></span><input type="checkbox" onclick="checkChange(this)"></input>'+attr+'</span>';
var nextpar=document.createElement('ul');
ele.appendChild(nextpar);
generate(json[attr],nextpar);
}
par.appendChild(ele);
}
}
generate(json,document.getElementById('container'));
//处理展开和收起
function toggle(eve)
{
var par=eve.parentNode.nextElementSibling;
if(par.style.display=='none')
{
par.style.display='block';
eve.className='switch-open';
}
else
{
par.style.display='none';
eve.className='switch-close';
}
}
//处理全部勾选和全部不选
function checkChange(eve)
{
var oul=eve.parentNode.nextElementSibling;
if(eve.checked)
{
for(var i=0;i<oul.querySelectorAll('input').length;i++)
{
var ch = oul.querySelectorAll('input')[i];
ch.checked=true;
var sp = document.getElementById('sp');
var arr = sp.innerHTML.split(';');
if(arr[0]==""){
arr.shift()
}
var leaf = ch.dataset.leaf;
arr.remove(leaf);/*防止重复添加*/
if(leaf !=undefined){
arr.push(leaf)
}
sp.innerHTML=arr.join(';');
console.log(ch.type + leaf)
}
}
else
{
for(var i=0;i<oul.querySelectorAll('input').length;i++)
{
var ch = oul.querySelectorAll('input')[i];
ch.checked=false;
var sp = document.getElementById('sp');
var arr = sp.innerHTML.split(';');
if(arr[0]==""){
arr.shift()
}
var leaf = ch.dataset.leaf
arr.remove(leaf)
sp.innerHTML=arr.join(';');
}
}
}
function sel(e)
{
var sp = document.getElementById('sp');
var arr = sp.innerHTML.split(';');
if(arr[0]==""){
arr.shift()
}
var e1 = e.nextSibling;
if(e.checked){
arr.push(e1.nodeValue);
}else{
arr.remove(e1.nodeValue);
}
sp.innerHTML=arr.join(';');
console.log(arr)
}
</script>
</body>
<html>
