从外部函数调用Javascript立即函数
[英]Javascript immediate function call from external function
问题描述
I am trying to call the immediate function defined in test1.js on click of the button defined under html file. 
我试图在html文件下定义的按钮单击时调用test1.js中定义的立即函数。 It always throws error "test is undefined". 它总是抛出错误“测试未定义”。 I am little bit aware that being a immediate function, it calls immediately, and so it returns the "undefined error". 我有点意识到，作为立即函数，它会立即调用，因此会返回“未定义错误”。 But is there any way I can call the immediate function (access methods, properties, etc.) on click of the button? 但是，单击按钮有什么方法可以调用立即函数（访问方法，属性等）？
Thank you in advance. 先感谢您。
//test1.js var test = (function(){ alert(window); var tmp = 'hello'; }());
<!DOCTYPE html> <html> <head> </head> <body> <script type="text/javascript" src="test1.js"></script> <input type="button" id="btn1" value="ClickMe!" /> <script type="text/javascript"> var btn = document.getElementById("btn1"); btn.addEventListener("click",fun1,false); function fun1(){ alert(test.tmp); } </script> </body> </html>
2 个解决方案
解决方案1
2 已采纳 2016-09-18 15:59:53
You have to modify your code so that the IIFE returns an object with a tmp property. 您必须修改代码，以便IIFE返回带有tmp属性的对象。 Such as 如
var test = (function(){
alert(window);
var tmp = 'hello';
return {tmp:tmp};
}());
解决方案2
0 2016-09-18 16:13:35
You need to explicitly return an object containing any data you want made available after you run the IIFE. 在运行IIFE之后，您需要显式返回一个对象，该对象包含想要使之可用的任何数据。 (Just add the return as I did to the snippet below). （只需像我在下面的代码段中那样添加收益）。
//test1.js var test = (function(){ alert(window); // you need to return any values you want accessible return { tmp: "hello" } }());
<!DOCTYPE html> <html> <head> </head> <body> <script type="text/javascript" src="test1.js"></script> <input type="button" id="btn1" value="ClickMe!" /> <script type="text/javascript"> var btn = document.getElementById("btn1"); btn.addEventListener("click",fun1,false); function fun1(){ alert(test.tmp); } </script> </body> </html>
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.