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                ``` addClass()與removeClass() ``` 他們兩者是JQ函數庫提供的,他們兩者主要作用是,可用給匹配節點添加或移除類名稱操作 addClass():為添加節點類名稱 removeClass()為刪除類名稱 比如DIV中有一個類名叫做 box ``` <div class="box"> <div> ``` 可用使用addClass()添加節類名, addClass(“cur") DIV就變成了 ``` <div class="box cur" > <div> ``` ## 代碼如下: ~~~ <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <script src="./jquery/jquery-3.2.1.min.js"></script> <title>Title</title> <style> *{ margin: 0; padding: 0; } .box{ width:500px; height:500px; background: red; } .cur{ background: #4c6f2b; } </style> </head> <body> <button>點我添加類名</button> <button>點我移除類名</button> <div class="box"></div> </body> </html> <script type="text/javascript"> $("button:eq(0)").click(function(){ $("div").addClass("cur"); }); $("button:eq(1)").click(function(){ $("div").removeClass("cur"); }) </script> ~~~
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