Question

在我的本地计算机上，运行Node.js项目非常正常。但是，当我将应用程序部署到Heroku时，出现H10错误，并显示以下消息：

Error: Cannot find module './lib/websocket'

下面是我的package.json文件：

{
  "name": "mazebattles",
  "version": "1.0.0",
  "description": "multiplayer maze competition",
  "main": "server.js",
  "scripts": {
    "test": "node server.js"
  },
  "keywords": [
    "mazes",
    "multiplayer",
    "game",
    "race"
  ],
  "author": "henryzhu",
  "license": "ISC",
  "dependencies": {
    "easytimer.js": "^2.4.0",
    "express": "^4.16.4",
    "socket.io": "^2.2.0",
    "socketio": "^1.0.0",
    "uniqid": "^5.0.3"
  },
  "devDependencies": {
    "@babel/preset-env": "^7.4.2",
    "babel-cli": "^6.26.0",
    "babel-preset-env": "^1.7.0",
    "babel-preset-es2015": "^6.24.1"
  }, 
  "engines": {
    "node": "10.13.0"
  }
}

Answer 1

当依赖项存在于devDependencies中时，我就遇到了这个问题。您的堆栈跟踪应该会有所帮助，并且您可以找出要查看的模块。

Answer 2

我通过不部署node_modules解决了该错误。显然，Heroku会自动为您部署node_modules。

Heroku + Node.js部署：H10崩溃-找不到模块./lib/websocket

2 个答案: