node.js 本地模塊：在子文件夾中找不到模塊錯誤

Question

這是我的應用程序的文件夾結構

我將app_modules/bar和app_modules/foo稱為本地模塊

package.json根文件夾

 "dependencies": {
    "body-parser": "~1.18.2",
    "cookie-parser": "~1.4.3",
    "debug": "~2.6.9",
    "express": "~4.15.5",
    "jade": "~1.11.0",
    "morgan": "~1.9.0",
    "serve-favicon": "~2.4.5",
    "foo": "file:app_modules/foo",
    "bar": "file:app_modules/bar",
    "hello": "file:hello"
  }

當我需要模塊時

var fooModule = require('app_modules/foo'); 我有模塊未找到錯誤

foo模塊的package.json

{
  "name": "foo",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC"
}

Answer 1

默認情況下， require在node_modules文件夾中查找模塊。 要包含來自自定義位置的模塊，您需要使用./或../作為路徑前綴，具體取決於模塊來自您需要它的文件的級別。

所以，如果你想從app.js要求app_modules/foo ，你必須這樣做：

var fooModule = require('./app_modules/foo');