创建两个JavaScript文件。例如import_functions.js和main.js

1.) import_functions.js

// Declaration --------------------------------------

 module.exports =
   {
     add,
     subtract
     // ...
   }


// Implementation ----------------------------------

 function add(x, y)
 {
   return x + y;
 }

 function subtract(x, y)
 {
   return x - y;
 }
    

// ...

2.) main.js

// include ---------------------------------------

const sf= require("./import_functions.js")

// use -------------------------------------------

var x = sf.add(4,2);
console.log(x);

var y = sf.subtract(4,2);
console.log(y);

    

输出

6
2

创建两个文件，例如app.js和tools.js

app.js

const tools= require("./tools.js")


var x = tools.add(4,2) ;

var y = tools.subtract(4,2);


console.log(x);
console.log(y);

tools.js

 const add = function(x, y){
        return x+y;
    }
 const subtract = function(x, y){
            return x-y;
    }
    
    module.exports ={
        add,subtract
    }

输出

6
2

下面是一个简单明了的解释:

Server.js内容:

// Include the public functions from 'helpers.js'
var helpers = require('./helpers');

// Let's assume this is the data which comes from the database or somewhere else
var databaseName = 'Walter';
var databaseSurname = 'Heisenberg';

// Use the function from 'helpers.js' in the main file, which is server.js
var fullname = helpers.concatenateNames(databaseName, databaseSurname);

Helpers.js内容:

// 'module.exports' is a node.JS specific feature, it does not work with regular JavaScript
module.exports = 
{
  // This is the function which will be called in the main file, which is server.js
  // The parameters 'name' and 'surname' will be provided inside the function
  // when the function is called in the main file.
  // Example: concatenameNames('John,'Doe');
  concatenateNames: function (name, surname) 
  {
     var wholeName = name + " " + surname;

     return wholeName;
  },

  sampleFunctionTwo: function () 
  {

  }
};

// Private variables and functions which will not be accessible outside this file
var privateFunction = function () 
{
};

我也在寻找一个选项，包括代码而不编写模块，respp。为Node.js服务使用来自不同项目的相同测试独立源- jmparattes回答为我做了这件事。

这样做的好处是，您不会污染名称空间，我不会遇到“使用严格”的问题;而且效果很好。

以下是完整的样本:

加载脚本- /lib/foo.js

"use strict";

(function(){

    var Foo = function(e){
        this.foo = e;
    }

    Foo.prototype.x = 1;

    return Foo;

}())

SampleModule - index.js

"use strict";

const fs = require('fs');
const path = require('path');

var SampleModule = module.exports = {

    instAFoo: function(){
        var Foo = eval.apply(
            this, [fs.readFileSync(path.join(__dirname, '/lib/foo.js')).toString()]
        );
        var instance = new Foo('bar');
        console.log(instance.foo); // 'bar'
        console.log(instance.x); // '1'
    }

}

希望这对你有所帮助。

这是迄今为止我所创造的最好的方法。

var fs = require('fs'),
    includedFiles_ = {};

global.include = function (fileName) {
  var sys = require('sys');
  sys.puts('Loading file: ' + fileName);
  var ev = require(fileName);
  for (var prop in ev) {
    global[prop] = ev[prop];
  }
  includedFiles_[fileName] = true;
};

global.includeOnce = function (fileName) {
  if (!includedFiles_[fileName]) {
    include(fileName);
  }
};

global.includeFolderOnce = function (folder) {
  var file, fileName,
      sys = require('sys'),
      files = fs.readdirSync(folder);

  var getFileName = function(str) {
        var splited = str.split('.');
        splited.pop();
        return splited.join('.');
      },
      getExtension = function(str) {
        var splited = str.split('.');
        return splited[splited.length - 1];
      };

  for (var i = 0; i < files.length; i++) {
    file = files[i];
    if (getExtension(file) === 'js') {
      fileName = getFileName(file);
      try {
        includeOnce(folder + '/' + file);
      } catch (err) {
        // if (ext.vars) {
        //   console.log(ext.vars.dump(err));
        // } else {
        sys.puts(err);
        // }
      }
    }
  }
};

includeFolderOnce('./extensions');
includeOnce('./bin/Lara.js');

var lara = new Lara();

您仍然需要告知您想要导出的内容

includeOnce('./bin/WebServer.js');

function Lara() {
  this.webServer = new WebServer();
  this.webServer.start();
}

Lara.prototype.webServer = null;

module.exports.Lara = Lara;

创建两个js文件

// File cal.js
module.exports = {
    sum: function(a,b) {
        return a+b
    },
    multiply: function(a,b) {
        return a*b
    }
};

js主文件

// File app.js
var tools = require("./cal.js");
var value = tools.sum(10,20);
console.log("Value: "+value);

控制台输出

Value: 30