1.IIFE:
Immediately-Invoked function Expression 函式模組自呼叫
2.程式碼實現
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <div id="demo">的麼的事</div> </head> <body> <script> (function () { document.write("好啊好啊"); })(); //定義$ (window.$=function (args) { //定義val function val() { return getElem().innerHTML; } function getElem() { if(args!=null){ if(args.indexOf("#")==0){ return document.getElementById(args.substring(args.indexOf("#")+1,args.length)); } } } return { val:val } })(); document.write($("#demo").val()); </script> </body> </html>