<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> .sidebar{background: #333645;width: 200px; position: absolute; left: 0; top: 0; height: 100%; overflow: auto; transition: all 0.2s ease 0s;} .main{overflow: hidden; position: absolute; left: 200px; right: 0; height: 100%; transition: all 0.2s ease 0s;} .big-page .sidebar{left: -160px;} .big-page .main{left:40px;} </style> </head> <body> <div class="sidebar">侧边栏 <input type="button" value="切换" id="toggleclick" style="float: right"> </div> <div class="main">主体部分</div> </body> <script src="js/jquery-3.3.1.js"></script> <script> // 切换侧边栏 $(function(){ // 切换侧边栏 $("#toggleclick").click(toggleSidebar); }); //切换侧边栏显示隐藏 function toggleSidebar(){ $("body").toggleClass("big-page"); return false; } </script> </html>
效果截图：
