eslint-plugin-baseline-guard

ESLint plugin that warns when code uses web platform features that aren’t part of the Baseline by your chosen year.

Install

• npm i -D eslint eslint-plugin-baseline-guard

Configure

• .eslintrc.js:
  • module.exports = {
    • plugins: ["baseline-guard"],
    • rules: {
      • "baseline-guard/no-non-baseline": ["warn", { baseline: 2025 }]
    • }
  • }

Examples

• Warn when using pre-Baseline features:
  • document.body.style.has
  • :has(
  • inert
• Adjust the year to match your target support: { baseline: 2024 }

How it works

• Uses web-features data to map identifiers/members/tags/attrs to features
• Compares Baseline status to your configured year

Related packages

• baseline-guard-core: shared logic and APIs
• baseline-guard-cli: command-line scanner for CI and local

Author

• Raiyan Siddique

Repository

• https://github.com/raiyansiddz/baseline-guard

License

• MIT