- A+
所属分类：Web前端
<!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1"> <title></title> <script src="jquery-3.5.1.min.js" type="text/javascript" charset="utf-8"></script> <script type="text/javascript"> // 入口函数 $(document).ready(function() { var jqOpenLight = $("#openLight"); var jqCloseLight = $("#closeLight"); var jqBody = $("body"); $(jqOpenLight).click(function() { jqBody[0].style.backgroundColor = "white"; }) $(jqCloseLight).click(function() { jqBody.get(0).style.backgroundColor = "black"; }) }); </script> <style type="text/css"> div { background-color: red; height: 300px; margin: 50px; } </style> </head> <body> <input type="button" name="" id="openLight" value="开灯" /> <input type="button" name="" id="closeLight" value="关灯" /> <div id=""> </div> </body> </html>
