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modern.css
Modern CSS snippets compares older web development techniques with native replacements such as grid, nesting, and container queries.
About modern.css
modern.css is a website of side-by-side CSS comparisons. Each snippet shows an older technique, such as a JavaScript workaround or a hack, next to a native CSS replacement. The site reports 118 or more snippets across categories including Layout, Animation, Typography, Workflow, Selectors, HTML, Colors, Architecture, and Accessibility. Layout has the most, with 41 snippets.
Each snippet carries a browser compatibility label: All, Widely available, Newly available, or Limited. Several snippets are marked Limited, so some of the modern techniques may not be supported in every browser. The site also offers reference pages, a cheatsheet, and an RSS feed. Pricing is not stated.
Key features
- Side-by-side old and modern CSS code for each snippet
- 118 or more snippets across Layout, Animation, Typography, and other categories
- Browser compatibility label on each snippet: All, Widely available, Newly available, or Limited
- Examples of replacing JavaScript scroll handling with overflow-anchor and scroll-margin
- Examples of native features such as abs(), sign(), calc-size(), and font-palette
- Examples of device-posture media queries for foldable screen layouts
Best for: Web developers and students who want to replace older CSS workarounds with current native features and check how widely each feature is supported.
Good for
- Each comparison pairs an older technique with its native replacement
- Compatibility labels show how widely each feature is supported
- Covers more than 100 snippets across several areas of CSS
Watch out for
- Several snippets are marked Limited for browser availability
- Some examples, such as device-posture for foldable screens, are narrow in scope and marked Limited
modern.css at a glance
- Website
- modern-css.com
- Category
- Education & Learning › Learn to Code
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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modern.css FAQ
What do the browser compatibility labels mean?
Each snippet is labeled All, Widely available, Newly available, or Limited to indicate browser compatibility. Snippets marked Limited have restricted availability.
Does each snippet show both the older technique and the modern one?
Yes. Each snippet shows an old way and a modern way, so the two can be compared side by side.
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