What is exports and prototype in Javascript?
I am new to Javascript and am seeing a lot of usage of exports and prototype in the code that I read. What are they mainly used for and how do they work?
//from express
var Server = exports = module.exports = function HTTPSServer(options, middleware){
connect.HTTPSServer.call(this, options, []);
this.init(middleware);
};
Server.prototype.__proto__ = connect.HTTPSServer.prototype;
Exports is used to make parts of your module available to scripts outside the module. So when someone uses require like below in another script:
var sys = require("sys");
They can access any functions or properties you put in module.exports
The easiest way to understand prototype in your example is that Server is a class that inherits all of the methods of HTTPSServer . prototype is one way to achieve class inheritance in javascript.
这段视频解释了node.js module.exports，这里是一个描述JavaScript原型的资源。
链接地址: http://www.djcxy.com/p/96632.html