為什么我不需要在node.js中表達

Question

我正在嘗試使最簡單的node.js腳本起作用。 這是JavaScript文件：

server.js

require("express");

我使用常規節點命令啟動腳本：

$ node server.js

但是我得到一個錯誤：

node.js:201
        throw e; // process.nextTick error, or 'error' event on first tick
              ^
Error: require.paths is removed. Use node_modules folders, or the NODE_PATH environment variable instead.
    at Function.<anonymous> (module.js:378:11)
    at Object.<anonymous> (/home/shawn/.node_libraries/express@2.5.9/index.js:4:21)
    at Module._compile (module.js:441:26)
    at Object..js (module.js:459:10)
    at Module.load (module.js:348:32)
    at Function._load (module.js:308:12)
    at Module.require (module.js:354:17)
    at require (module.js:370:17)
    at Object.<anonymous> (/home/shawn/Documents/Projets/passingData/server.js:3:15)
    at Module._compile (module.js:441:26)

這是怎么回事？

更新

有趣的是，使用npm install express輸出類似的結果：

node.js:201
        throw e; // process.nextTick error, or 'error' event on first tick
              ^
Error: require.paths is removed. Use node_modules folders, or the NODE_PATH environment variable instead.
    at Function.<anonymous> (module.js:378:11)
    at Object.<anonymous> (/home/shawn/.node_libraries/mkdirp@0.3.0/index.js:4:21)
    at Module._compile (module.js:441:26)
    at Object..js (module.js:459:10)
    at Module.load (module.js:348:32)
    at Function._load (module.js:308:12)
    at Module.require (module.js:354:17)
    at require (module.js:370:17)
    at Object.<anonymous> (/usr/lib/nodejs/fstream/lib/dir-reader.js:11:13)
    at Module._compile (module.js:441:26)

Answer 1

您需要像這樣在全局安裝（如果您不將其作為軟件包構建）

npm install express -g

或者，如果您將其包含在package.json ，則必須在本地安裝npm install -l ，它將正常工作。