eslint-config-base

These are my preferred code style linting rules. You'll probably hate them.

Idea behind these

No tricks, no magic, no useless code, no complicated code. Very opinionated about all these spaces, quotes, parentheses. A bit of sanity applied, but not too much.

ES-which?

Rules are prepared for ES6+ code. Parser is set to ecmaVersion 9. Some rules may require ES6+ code so you'd better update your transpiler.

Installation

npm i eslint @dzek69/eslint-config-base --save-dev

Put .eslintrc.json in your root directory and fill it with:

{
  "extends": [
    "@dzek69/eslint-config-base"
  ]
}

Make sure to set your other config, like env, see eslint config guide.

Then to lint src and test directories with subdirectories run:

npx eslint src/**/*.js src/*.js test/**/*.js test/*.js

Test files issues

Some of these rules may be annoying in tests files (like max lines number limit or not allowing global describe or other test runner methods). Use overrides in your config:

{
  "overrides": [
    {
      "files": ["test/*.js", "test/**/*.js"],
      "env": {
        "mocha": true
      },
      "rules": {
        "max-lines": "off"
      }
    }
  ]
}

See eslint config guide for more details about env options.

Full config example

This is full config that I am using in one of my projects, feel free to take inspiration:

{
  "extends": [
    "@dzek69/eslint-config-base"
  ],
  "env": {
    "node": true
  },
  "overrides": [
    {
      "files": ["src/*.spec.js", "src/**/*.spec.js"],
      "env": {
        "mocha": true
      },
      "rules": {
        "global-require": "off",
        "max-lines": "off",
        "max-lines-per-function": "off",
        "max-statements": "off",
        "no-magic-numbers": "off"
      }
    }
  ]
}

Suggested CLI config

Add:

• --no-error-on-unmatched-pattern - to prevent errors while you start working on your lib and not all patterns matches yet

License

MIT