css实现树形可折叠菜单效果代码-html代码-BFW代码库

css实现树形可折叠菜单效果代码

代码语言：html

代码描述：css实现树形可折叠菜单效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en">

<head>

    <meta charset="UTF-8">



    <style>
        body {
            margin: 30px;
            font-family: sans-serif;
            background: white;
        }

        #fontSizeWrapper {
            font-size: 16px;
        }

        #fontSize {
            width: 100px;
            font-size: 1em;
        }

        /* ————————————————————–
  Tree core styles
*/
        .tree {
            margin: 1em;
        }

        .tree input {
            position: absolute;
            clip: rect(0, 0, 0, 0);
        }

        .tree input ~ ul {
            display: none;
        }

        .tree input:checked ~ ul {
            display: block;
        }

        /* ————————————————————–
  Tree rows
*/
        .tree li {
            line-height: 1.2;
            position: relative;
            padding: 0 0 1em 1em;
        }

        .tree ul li {
            padding: 1em 0 0 1em;
        }

        .tree > li:last-child {
            padding-bottom: 0;
        }

        /* ————————————————————–
  Tree labels
*/
        .tree_label {
            position: relative;
            display: inline-block;
            background: #fff;
        }

        label.tree_label {
            cursor: pointer;
        }

        label.tree_label:hover {
            color: #666;
        }

        /* ————————————————————–
  Tree expanded icon
*/
        label.tree_label:before {
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