Run Prettier and ESLint before committing code.

prettier-eslint-pre-commit.bash

#!/usr/bin/env bash

# short-circuit script for any non-zero exit
set -e

################################################################################
# This script will run ESLint over all staged files with js or jsx extensions.
# Author: William Carroll
################################################################################

# we want to exclude files that were deleted, since prettier cannot do anything
# with these
files=$(git diff --name-only --cached --diff-filter=d | grep -E '\.jsx?$')

# there will be problems if your ESLint configuration disagrees with your 
# Prettier configuration
npx prettier --write ${files} && git add ${files}
npx eslint ${files}

This is an MVP and only targets javascript files. This will need to be augmented if you intend on using Prettier to format any JSON or styles code, which it does quite well!