javascript - 在Node.js中，如何从其他文件中“包含”函数？(In Node.js, how do I “include” functions from my other files?)

Question

Let's say I have a file called app.js.(假设我有一个名为app.js的文件。)

Pretty simple:(很简单：) var express = require('express'); var app = express.createServer(); app.set('views', __dirname + '/views'); app.set('view engine', 'ejs'); app.get('/', function(req, res){ res.render('index', {locals: { title: 'NowJS + Express Example' }}); }); app.listen(8080); What if I have a functions inside "tools.js".(如果我在“ tools.js”中有一个函数，该怎么办。) How would I import them to use in apps.js?(如何导入它们以在apps.js中使用？) Or...am I supposed to turn "tools" into a module, and then require it?(或者...我应该把“工具”变成一个模块，然后需要它吗？) << seems hard, I rather do the basic import of the tools.js file.(<<似乎很难，我宁愿对tools.js文件进行基本导入。)   ask by TIMEX translate from so

Answer 1

You can require any js file, you just need to declare what you want to expose.(您可以要求任何js文件，只需声明要公开的内容即可。)

// tools.js // ======== module.exports = { foo: function () { // whatever }, bar: function () { // whatever } }; var zemba = function () { } And in your app file:(在您的应用文件中：) // app.js // ====== var tools = require('./tools'); console.log(typeof tools.foo); // => 'function' console.log(typeof tools.bar); // => 'function' console.log(typeof tools.zemba); // => undefined