JS pre-commit hook (Prettier, linting). Noticeably faster than lint-staged.

fast-js-pre-commit

#!/usr/bin/env sh
. "$(dirname "$0")/_/husky.sh"
set -e
bin_dir="node_modules/.bin"
echo "running pre-commit script..."

# --diff-filter used to exclude deleted files
prettier_staged_files=$(git diff --cached --name-only --diff-filter="ACMRTUXB")
eslint_staged_files=$(git diff --cached --name-only --diff-filter="ACMRTUXB" -- *.{tsx,ts,js,jsx})

prettier_length=${#prettier_staged_files} 
eslint_length=${#eslint_staged_files}

if [ $eslint_length -gt 0 ]
then
    $bin_dir/eslint --no-error-on-unmatched-pattern --ignore-path .gitignore --fix --ext .jsx,.js,.ts,.tsx --cache  $eslint_staged_files
    git add $eslint_staged_files
fi

if [ $prettier_length -gt 0 ]
then
    $bin_dir/prettier --ignore-unknown --no-error-on-unmatched-pattern --ignore-path .gitignore --cache --write $prettier_staged_files
    git add $prettier_staged_files
fi

One-liner to install in a repo. Prereqs: Husky, Prettier, ESLint.

npx husky add .husky/pre-commit "" &&\ 
curl -s https://gist.githubusercontent.com/leothorp/85f8bbe6d9f4a117c\
40165e99a656598/raw/1516ddaeebaa56ee42331e16b42bf00eab66b4\
d8/fast-js-pre-commit | sed -e 1,2d >> .husky/pre-commit &&\
npx husky install