@gossi/config-eslint

Add eslint to your packages. Based on NullVoxPopuli/eslint-config.

This lint config meta package is setup to lazily detect which plugins and configurations you have installed and automatically add them to your lint config.

This has the following benefits:

• No need to install dependencies you don't use (typescript, for example)
• Progressive enhancement as you decide you want more behaviors / lints
• Minimal impact to node_modules so that local dev and C.I. are not unnecessarily hit with extra dependencies

Installation

1) Install these packages

pnpm add -D @gossi/config-eslint eslint

2) Create Config

Create a .eslintrc.js file with your desired config (see below)

3) Add scripts to execute linting

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

4) Add packages to describe your project

Describe your project:

• Basic:
  • @babel/core (bring your version)
• Javascript:
  • @babel/eslint-parser
• Typescript:
  • @typescript-eslint/eslint-plugin
  • @typescript-eslint/parser

Zero config for these plugins, installing them is enough:

• Ember:
  • eslint-plugin-ember
  • eslint-plugin-qunit
• Storybook:
  • eslint-plugin-storybook

Configs

Ember

Accommodates: JS, TS, App, and Addon

// .eslintrc.js
'use strict';
const { configs } = require('@gossi/config-eslint');

// accommodates: JS, TS, App, Addon, and V2 Addon
module.exports = configs.ember();

overriding:

// .eslintrc.js
'use strict';
const { configs } = require('@gossi/config-eslint');

const config = configs.ember();

module.exports = {
  ...config,
  overrides: [
    ...config.overrides,
    // your modifications here
    // see: https://eslint.org/docs/user-guide/configuring/configuration-files#how-do-overrides-work
  ]
}

Cross Platform

This config is ESM, as ESM is the most widely supported module format across different distributions (browser, node, etc).

// .eslintrc.cjs
'use strict';

const { configs } = require('@gossi/config-eslint');

// accommodates: JS, TS, ESM, and CJS
module.exports = configs.crossPlatform();

Node

This config looks at your package.json to determine if your project is CommonJS or ES Modules.

// .eslintrc.js
'use strict';
const { configs } = require('@gossi/config-eslint');

// accommodates: JS, TS, ESM, and CJS
module.exports = configs.node();

overriding:

// .eslintrc.js
'use strict';

const { configs } = require('@gossi/config-eslint');
const config = configs.node();

module.exports = {
  ...config,
  overrides: [
    ...config.overrides,
    // your modifications here
    // see: https://eslint.org/docs/user-guide/configuring/configuration-files#how-do-overrides-work
  ]
}

Node (CJS)

This config is for when *.js is CommonJS, and ES Modules are used via the *.mjs extension.

// .eslintrc.js
'use strict';
const { configs } = require('@gossi/config-eslint');

// accommodates: JS, TS, and CJS
module.exports = configs.nodeCJS();

Node (ESM)

This config is for when *.js is ES Modules, and CommonJS are used via the *.cjs extension.

// .eslintrc.js
'use strict';
const { configs } = require('@gossi/config-eslint');

// accommodates: JS, TS, and ESM
module.exports = configs.nodeESM();

Debugging

To see what the resolved config looks like for a file

node_modules/.bin/eslint --print-config path/to/file