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                ## 函數上下文 ``` $(this) ``` <br/> <br/> 概述:函數上下文$(this) 如果在函數中出現(只能在函數體中使用) ## **注意:只能在事件函數中使用** 事件處理函數中上下文$(this) 作為事件處理函數上下文this—>當前觸發這個事件節點。 ### ### 代碼案例: ~~~ $("li").click(function(){ $(this).css({"color":"red"}); }); ~~~ ### 以下代碼為點擊其中任意一個li標簽,使其文字變成紅色 ~~~ <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <script src="./jquery/jquery-3.2.1.min.js"></script> <title>Title</title> <style> </style> </head> <body> <ul> <li>吃飯</li> <li>睡覺</li> <li>打豆豆</li> <li>喝酒</li> <li>燙頭</li> </ul> </body> </html> <script type="text/javascript"> $("li").click(function(){ $(this).css({"color":"red"}); }); </script> ~~~
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