[solved] firebase Cannot find module 'express'

1. problem

Error : Cannot find module 'express' 

2. solution

I modified the package.json

You should enter the express information in dependencies.

the package.json is located in functions(folder).

your firebase project name > functions > package.json

package.json

{
  "name": "functions",
  "description": "Cloud Functions for Firebase",
  "scripts": {
    "lint": "eslint .",
    "serve": "firebase serve --only functions",
    "shell": "firebase functions:shell",
    "start": "npm run shell",
    "deploy": "firebase deploy --only functions",
    "logs": "firebase functions:log"
  },
  "dependencies": {
    "express": "^4.16.3",
    "firebase-admin": "~6.0.0",
    "firebase-functions": "^2.0.3"
  },
  "devDependencies": {
    "eslint": "^4.12.0",
    "eslint-plugin-promise": "^3.6.0"
  },
  "private": true
}

good luck!

#firebase #module #express