NodeJS原理解析 - 模块系统

模块化

示例代码：

let name = 'Daivd';
let getName = function(name){
    console.log(name);
};
// 1. 通过Module.export导出
module.exports = {
    name: name,
    getName: getName
};
// 2. 通过export直接导出
//export obj = {...};

let p = require('./demo');
console.log(p.name);
p.getName('Jim');
p.name = 'Kitty';
console.log(module);
// Module {
//     id: '.',
//     path: 'C:\\Users\\dzwang\\Desktop\\My JS\\网易云\\课程\\node\\nodeJS',
//     exports: {},
//     parent: null,
//     filename: 'C:\\Users\\dzwang\\Desktop\\My JS\\网易云\\课程\\node\\nodeJS\\01.js',
//     loaded: false,
//     children: [
//       Module {
//         id: 'C:\\Users\\dzwang\\Desktop\\My JS\\网易云\\课程\\node\\nodeJS\\demo.js',
//         path: 'C:\\Users\\dzwang\\Desktop\\My JS\\网易云\\课程\\node\\nodeJS',
//         exports: [Object],
//         parent: [Circular],
//         filename: 'C:\\Users\\dzwang\\Desktop\\My JS\\网易云\\课程\\node\\nodeJS\\demo.js',
//         loaded: true,
//         children: [],
//         paths: [Array]
//       }
//     ],
//     paths: [
//       'C:\\Users\\dzwang\\Desktop\\My JS\\网易云\\课程\\node\\nodeJS\\node_modules',
//       'C:\\Users\\dzwang\\Desktop\\My JS\\网易云\\课程\\node\\node_modules',
//       'C:\\Users\\dzwang\\Desktop\\My JS\\网易云\\课程\\node_modules',
//       'C:\\Users\\dzwang\\Desktop\\My JS\\网易云\\node_modules',
//       'C:\\Users\\dzwang\\Desktop\\My JS\\node_modules',
//       'C:\\Users\\dzwang\\Desktop\\node_modules',
//       'C:\\Users\\dzwang\\node_modules',
//       'C:\\Users\\node_modules',
//       'C:\\node_modules'
//     ]
//   }

module.exports = {
    name: 'Daivd',
    getName: function(name){
        console.log(name);
    }
};
console.log(module);

exports和module.exports区别示例：

var module = {
    exports: {}
};
var exports = module.exports;
function change(exports) {
    exports.name = 'David';
    exports = {
        age: 22
    };
    console.log(exports);
}
change(exports);
console.log(exports);

require方法详解

路径解析：