You may not know the JavaScript new Function () method _javascript Tips

Most of us have used JavaScript, and in recent years the popularity of JavaScript frameworks has made JavaScript more magical and easy. "Anonymous (anonymous) function?" I don't know what it is, but it seems to be the same as what I wrote. ”
You may not know that you can pass the new function () a string as the body of the function to construct a JavaScript function. It's not often used in programming, but sometimes it should be useful.

The following is the basic usage of the new Function:

Copy Code code as follows:

The last parameter is the body (function) of the function, and the type is string;
The previous arguments are the arguments for the constructed function (first name)
var myfunction = new Function (' users ', ' salary ', ' return users * salary ');

It's very simple, isn't it?

The question is: when is it appropriate to use this approach, instead of using the traditional function declaration functions Myfnname () and/or anonymous function definitions? Andrea Giammarchi that the most appropriate scenario for using this function definition is in the global context of Nodejs and browsers:

Copy Code code as follows:

(function (Win) {


Performing certain actions in the global environment


}) (Function (' Return this ') ());

If you have ever used the new function mode, please comment and discuss!