@appleute/eslint-config v3.0.3

Appleute ESLint Config

Shared ESLint configs for appleute projects.

TODO

• Config for next.js, waiting for support to be added. See https://github.com/vercel/next.js/issues/64453
• Config for expo, waiting for support to be added. See https://github.com/expo/expo/blob/main/packages/eslint-config-expo/package.json
• Sort imports using eslint sort-imports or eslint-plugin-import

Usage

Configuration

New project

Install this package and peer dependencies

yarn add -D eslint prettier @appleute/eslint-config

Existing project

Install this package and update peer dependencies

yarn add -D eslint@latest prettier@latest @appleute/eslint-config

This package already inclues eslint plugins and configs, so you can remove them if you have any installed.

Configure ESLint

Create a eslint.config.js in your project root and import the desired config.

const nodeConfig = require("@appleute/eslint-config/node");

/** @type import("eslint").Linter.Config[] */
module.exports = [...nodeConfig];

Configure Prettier

Create a .prettierrc.js in your project root and import the prettier config.

.prettierrc.js

const prettierRc = require("@appleute/eslint-config/.prettierrc.js");

/** @type import("prettier").Config */
module.exports = {
  ...prettierRc,
};

.prettierignore

You can copy the .prettierignore file as is from the package.

cp node_modules/@appleute/eslint-config/.prettierignore .

Commit hooks

Setup a pre-commit hook using husky and lint-staged to automatically lint and prettify before commit.

1. Install husky and lint staged

yarn add -D husky lint-staged
# Add pinst ONLY if your package is not private
yarn add -D pinst

2. Configure package.json

{
  ...
  "scripts": {
    // Yarn doesn't support prepare script
    "postinstall": "husky",
    // Include this if publishing to npmjs.com
    "prepack": "pinst --disable",
    "postpack": "pinst --enable"
  },
  "husky": {
    "hooks": {
      "pre-commit": "lint-staged"
    }
  },
  "lint-staged": {
    "**/*": "prettier --write --ignore-unknown",
    "**/*.{js,ts,jsx,tsx}": "eslint --fix"
  },
}

3. Add pre-commit hook

yarn husky
echo "npx lint-staged" > .husky/pre-commit

VSCode Config

Configure your vscode to allow formatting on save, and use the typescript verison configured by the project instead of the vscode version.

Create .vscode/settings.json at the root of your repository.

{
  "editor.formatOnSave": true,
  "editor.codeActionsOnSave": {
    "source.fixAll.eslint": "always"
  },
  "typescript.tsdk": "node_modules/typescript/lib"
}

TSConfig

Ensure strict is turned on:

{
  "compilerOptions": {
    "strict": true,
    "strictPropertyInitialization": false
  }
}

Develop

Publish

Use npm version to increment major, minor or patch version

Then publish using:

npm publish