node.js 错误：找不到模块“cors”
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Error: Cannot find module 'cors'
提问by erickimme
I keep getting this error message below: I tried to find other stackoverflow post and articles but couldn't really sovle it. do any of you guys know what the problem is it?
我一直在下面收到此错误消息：我试图找到其他 stackoverflow 帖子和文章，但无法真正解决它。你们中有人知道是什么问题吗？
`kimeric@pal-nat186-87-17 ~/Desktop/cs390/Assignment9/backEnd 鉳aster ? ● ? node server9.js
module.js:472
throw err;
^
Error: Cannot find module 'cors'
at Function.Module._resolveFilename (module.js:470:15)
at Function.Module._load (module.js:418:25)
at Module.require (module.js:498:17)
at require (internal/module.js:20:19)
at Object.<anonymous> (/Users/kimeric/Desktop/cs390/Assignment9/backEnd/server9.js:11:12)
at Module._compile (module.js:571:32)
at Object.Module._extensions..js (module.js:580:10)
at Module.load (module.js:488:32)
at tryModuleLoad (module.js:447:12)
at Function.Module._load (module.js:439:3)`
回答by Ido.Co
Run npm install cors --savefrom the command line in the main project directory to install it and add it to your package.json
npm install cors --save从主项目目录中的命令行运行以安装它并将其添加到您的 package.json
It is possible that the cors module was separated from the main express package a long time ago, and the code you are using was written before that. (Or never was a part of it, to begin with)
可能cors模块很久以前就和主快递包分离了，你用的代码是在这之前写的。（或者从来没有参与其中，一开始）
回答by rohit13807
Need to install cors library. Use terminal and run "npm install cors" then use below in server.js file:
需要安装cors库。使用终端并运行“ npm install cors”，然后在 server.js 文件中使用以下内容：
var express = require('express')
var cors = require('cors')
var app = express()
app.use(cors())
Or, refer link: https://www.npmjs.com/package/cors
或者，参考链接：https: //www.npmjs.com/package/cors
Thanks,
谢谢，
回答by Pugmark
Try running npm link corsand then run npm install
尝试运行npm link cors然后运行npm install
回答by Basil Victor
You can simply open the package.json file in any text editor and add cors under dependencies like this:
"cors": "2.8.5"
你可以简单地在任何文本编辑器中打开 package.json 文件并在依赖项下添加 cors 如下：
"cors": "2.8.5"
Since the latest version of cors is 2.8.5
由于cors的最新版本是2.8.5
