標籤：src 定義 doc callback cli script query com blog
<!DOCTYPE HTML><html><head> <meta charset="GBK" /> <title>回呼函數(callback)</title> <script type="text/javascript" src="http://cdn.bootcss.com/jquery/1.9.0/jquery.min.js"></script> <script language="javascript" type="text/javascript"> var f; function d(){ alert("我是Jquery定義的函數d"); } var e = function(){ alert("我也是Jquery定義的函數e"); } function a(callback) { alert("我是parent函數a！"); d(); if (typeof callback === "function"){ callback(); } } function b(){ alert("我是回呼函數b"); d(); e(); f(); } function c(){ alert("我是回呼函數c"); d(); e(); f(); } function test1() { a(b); } function test2() { a(c); } $(function(){ f = function(){ alert("我是回呼函數f"); } }); </script></head><body> <h1>學習js回呼函數</h1> <button onClick=test1()>test a(b)</button> <button onClick=test2()>test a(c)</button> <p>應該能看到調用了兩個回呼函數</p> <p> </p></body></html>
網上看了一個例子，進行了修改，按上面方式可以回調成功，直接複製粘貼到html檔案中即可測試
學習js回呼函數
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