A simple way to run eslint on staged changes.
npm install --save-dev eslint-staged
Pairs great with husky. Install husky, and add a precommit script to your package.json:
{
"scripts": {
"precommit": "eslint-staged"
}
}
This lets you make sure you always lint the changes you're actually
committing, not just your working tree. Run it any time with
npm run -s precommit.