How to fix npm ERR! Missing script: in npm | DevErrors

How to fix "npm ERR! Missing script:"

1List available scripts

See what scripts are defined:

bash

npm run

# Or view directly
cat package.json | jq .scripts

2Check script name spelling

Common typos:

bash

# These are different!
npm run dev    # vs
npm run start  # vs
npm run serve

npm test    # vs
npm run test

Note: npm test, npm start are shortcuts.

3Verify correct directory

Make sure you're in the right place:

bash

pwd
ls package.json

# Check it's the right project
cat package.json | grep name

4Add the missing script

Define the script:

json

{
  "scripts": {
    "start": "node index.js",
    "dev": "nodemon index.js",
    "build": "webpack",
    "test": "jest"
  }
}

5Use npx for one-off commands

Run package binaries directly:

bash

# Instead of npm run script
npx webpack
npx jest
npx eslint .

Doesn't require script in package.json.

6Check project documentation

Find correct commands:

1. Read README.md
2. Check CONTRIBUTING.md
3. Look at other scripts for clues
4. Search project issues/discussions

How to fix npm ERR! Missing script: in npm