cssdb

cssdb

cssdb is a list of CSS features and their positions in the process of becoming implemented web standards.

Did you come here to update the status of a CSS feature or add a new one? Quick, read CONTRIBUTING.md.

Did you come here to learn about the stages? Quick, read STAGES.md.

cssdb ranks CSS features by stages that reflect the real-life stability of new CSS features.

You can read an inside view of the CSSWG to learn about the official (and unofficial) development stages of CSS specifications. In reality, specifications and browser implementations happen out of sync. For example, there are stable CSS features missing in all browsers, while other CSS features developed outside the CSSWG have appeared in browsers behind flags. This is too ambiguous for the web development community, and a more accountable process is desired.

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postcss

PostCSS is a tool for transforming CSS with JavaScript plugins. While cssdb provides a database of CSS features, PostCSS allows developers to write plugins that can transform CSS by adding fallbacks for future CSS features, linting CSS, and more. PostCSS can be extended with plugins that utilize the data from cssdb to polyfill future CSS features.

caniuse-api

The caniuse-api provides access to browser support tables for modern web technologies from the Can I Use website. Unlike cssdb, which focuses on the standardization stages of CSS features, caniuse-api offers detailed information about the support and compatibility of web technologies across various browsers and versions. It's more focused on browser support data rather than the standardization process.