GIF動態圖:javascript
代碼:css
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <script src="jquery-3.3.1.js"></script> </head> <body> <div> <p>點擊讓字體變紅</p> </div> <script type="text/javascript"> $(function(){ $("div").on("click",function(){ $(this).find("p:nth-child(1)").css("color","red"); }); }); </script> </body> </html>