**什么是 JavaScript 回调函数?**
**示例**
<html> <head> <script> var callback = function(myCallback) { setTimeout(function() { myCallback(); }, 5000); }; document.write("First is displayed"); document.write("<br>Second is displayed"); callback(function() { document.write("This is Callback function"); }); document.write("<br>Last is displayed"); </script> </head> </html>
广告