在同一个目录下建立 hello.js 和 main.js
hello.js
'use strict';
var s = 'Hello';
function greet(name) {
console.log(s + ', ' + name + '!');
}
module.exports = greet;
main.js
'use strict';
var greet = require('./hello');
var s = 'Michael';
greet(s);
https://www.liaoxuefeng.com/wiki/001434446689867b27157e896e74d51a89c25cc8b43bdb3000/001434502419592fd80bbb0613a42118ccab9435af408fd000
