Browserslist Lint

Check your Browserslist config with target browsers for popular mistakes.

npx browserslist-lint

Or try online: browsersl.ist

Rules:

• missedNotDead: lack of no dead with queries like last 2 versions.
• countryWasIgnored: bad coverage in some country with >10M Internet users.
• limitedBrowsers: ignoring browsers diversity by calling only a few browsers directly in config.
• alreadyDead: browser with not is already in not dead or defaults.

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  Browserslist Lint is built by Evil Martians, an American design and engineering consultancy for developer tools, AI, and cybersecurity startups.

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Pre-Commit Hook

This project is also available as a pre-commit hook. Please add the following to your pre-commit configuration.

repos:
  - repo: https://github.com/browserslist/lint
    id: browserslist-lint

JS API

import { lint } from 'browserslist-lint'

lint('defaults, not ie 11') // => [{
//      id: 'alreadyDead',
//      message: '`not ie 11` already in `defaults`'
//      fixed: 'defaults'
//    }]

// Without option with find Browserslist automatically
lint() // => [{ id, message, fixed }]