node.js 如何在不全局安装的情况下在 Node REPL 中要求 Node 模块？
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How To Require Node Module In Node REPL Without Installing Globally?
提问by user2316667
As per the node js instruction manual, it is highly discouraged to install any node module globally.
根据 node js 说明手册，强烈建议不要全局安装任何 node 模块。
I tried a variety of things. I executed the following commands in my home directory, in my git file (with the node_modules) folder, and the actual node_modules folder.
我尝试了各种各样的东西。我在我的主目录、我的 git 文件（带有 node_modules）文件夹和实际的 node_modules 文件夹中执行了以下命令。
> var express=require('express');
undefined
> var express=require('node_modules/express');
Error: Cannot find module 'node_modules/express'
at Function.Module._resolveFilename (module.js:338:15)
at Function.Module._load (module.js:280:25)
at Module.require (module.js:364:17)
at require (module.js:380:17)
at repl:1:13
at REPLServer.self.eval (repl.js:110:21)
at repl.js:249:20
at REPLServer.self.eval (repl.js:122:7)
at Interface.<anonymous> (repl.js:239:12)
at Interface.EventEmitter.emit (events.js:95:17)
Note that in the above, I expected them in my git folder (with node_modules). I found it curious that the line
请注意，在上面，我希望它们在我的 git 文件夹中（带有 node_modules）。我觉得奇怪的是这条线
> var express=require('express');
yielded
屈服了
undefined
In the home directory, I just get the same "cannot find module" error.
在主目录中，我只是收到相同的“找不到模块”错误。
采纳答案by Peter Lyons
Your requirestatement is working fine. Ignore the undefined, that's just the node REPL. The undefinedis explained here, and see the comments below for links to additional material about that.
你的require陈述工作正常。忽略undefined，那只是节点 REPL。在这里undefined进行了解释，有关其他材料的链接，请参阅下面的评论。
You can verify with:
您可以通过以下方式验证：
mkdir /tmp/test-repl
cd /tmp/test-repl
npm install express
node
> var express = require('express');
undefined
> express
//long object which is the express module gets printed
回答by user3738936
Depending on the terminal/shell it may want you to specify the current directory. I am using gitbash at the moment.
根据终端/外壳，它可能希望您指定当前目录。我目前正在使用 gitbash。
_u = require('./node_modules/underscore/underscore');
When I do this the object is returned.
当我这样做时，对象被返回。
I am curious if this works for others, it worked for me.
我很好奇这对其他人是否有效，对我有效。
回答by dc5
Printing undefinedis normal behavior for both the browser console and the node repl.
打印undefined是浏览器控制台和节点 repl 的正常行为。
Try typing: express. (tab key) - you should get something like this:
尝试输入：express。(tab 键) - 你应该得到这样的东西：
> var express = require('express');
undefined
> express.
express.__defineGetter__ express.__defineSetter__ express.__lookupGetter__ express.__lookupSetter__ express.constructor express.hasOwnProperty
express.isPrototypeOf express.propertyIsEnumerable express.toLocaleString express.toString express.valueOf
express.apply express.arguments express.bind express.call express.caller express.constructor
express.length express.name express.toString
express.Route express.Router express.application express.arguments express.basicAuth express.bodyParser
express.caller express.compress express.cookieParser express.cookieSession express.createServer express.csrf
express.directory express.errorHandler express.favicon express.json express.length express.limit
express.logger express.methodOverride express.mime express.multipart express.name express.prototype
express.query express.request express.response express.responseTime express.session express.static
express.staticCache express.timeout express.urlencoded express.version express.vhost
