Eslint Fix An Existing JavaScript Project

Need some syntax sanity after creating a mess or inheriting one? Quickly format an entire project (or select files) with eslint:

Add your preferred eslint config (mine is Airbnb's) as a development dependency:

npx install-peerdeps --dev eslint-config-airbnb 

an .eslintrc file to your project root:

{ "extends": "airbnb" } 

a couple commands to your project's package.json:

 "scripts": { ... "lint": "eslint . --ext .js", "lint-fix": "eslint . --ext .js --fix" }, 

Note: the above entries look at your entire project!

Run npm run lint for a report and npm run lint-fix to format all .js files.