Frontend Engineering Tools
Browser Compatibility Reference
Search browser compatibility concepts. Covers Baseline 2024 widely available features, browserslist configuration, @supports progressive enhancement, and module/nomodule patterns.
No data is transmitted — everything runs locallyTool
About this tool
Browser Compatibility Reference
The Browser Compatibility Reference covers Baseline 2024 features, browserslist configuration, @supports progressive enhancement, and module/nomodule dual-bundle patterns.
• Check if CSS nesting is safe to use without a polyfill
• Reference browserslist config before setting Babel and PostCSS targets
• Look up :has() selector support before using it in production CSS
• Find module/nomodule pattern for dual-bundle serving to modern and legacy browsers
Next step
Accessibility Color Contrast Checker — Calculate WCAG 2.1 color contrast ratio and check AA/AAA compliance.
Open Accessibility Color Contrast Checker →
FAQ
What does this tool tell you?
The Browser Compatibility Reference covers Baseline 2024 features, browserslist configuration, @supports progressive enhancement, and module/nomodule dual-bundle patterns.
What affects the result most?
Baseline 2024: CSS nesting, :has(), Container Queries, View Transitions — widely available. Baseline widely available: feature available 30+ months across all major browsers — safe to use. Can I Use: caniuse.com data — use @supports for progressive enhancement, not user agent detection.
How should I use the result?
Use this tool to orient quickly to the concepts, field names, or values you are about to look up in a full specification or vendor documentation. It summarizes the common cases; the authoritative source remains whichever standard or vendor doc defines the values themselves.