nodejs文件调用-

类的调用：

Mail.js

function Mail(user_name,password){
    this.user_name = user_name;
    this.password = password;
}
Mail.prototype.autoRun = function() {
    console.log(this.user_name+this.password);
};
module.exports = Mail;

main.js

const Mail = require('./Mail');
let mail = new Mail("123","abc");
mail.autoRun();

函数的调用：

Mail.js

var m= require('./formula');
var f = require('./function');

m.add(1,2);
f();

formula.js

      function reduce(a,b){
          console.log(a-b);
      },
      function add(a,b){
          console.log(a+b);
      }
      module.exports = {
       reduce,
       add
      }

function.js

module.exports = function  print(){
     console.log("我是fun3的方法");
}