jQuery基礎知識，動態添加刪除CSS樣式
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>jQuery動態添加刪除CSS樣式</title> <script type="text/javascript" src="http://localhost/libs/jquery/2.1.1/jquery.min.js"></script> <script type="text/javascript"> $(document).ready(function () { $("#btn1").click(function() { $('#txtContent').addClass('red'); //追加樣式 }); $("#btn2").click(function() { $('#txtContent').removeClass('red'); //移除樣式 }); $("#btn3").click(function() { $('#txtContent').addClass('red weight family'); //追加多個樣式 }); $("#btn4").click(function() { $('#txtContent').removeClass('red weight'); //移除多個樣式 }); $("#btn5").click(function() { $('#txtContent').removeClass(); //移除所有樣式 }); }); </script> <style type="text/css"> .default { font-size: 30px; } .red { color: red; } .weight { font-weight: bold; } .family { font-family: "華文隸書" } </style> </head> <body> <div id="txtContent" class="default">你好呀！jQuery基礎知識！</div><br /> <input id="btn1" type="button" value="追加樣式" /> <input id="btn2" type="button" value="移除樣式" /> <input id="btn3" type="button" value="追加多個樣式" /> <input id="btn4" type="button" value="移除多個樣式" /> <input id="btn5" type="button" value="移除所有樣式" /> </body> </html>