Question 1

How do I check if a Rust feature is stable using caniuse.rs?

Accepted Answer

Visit caniuse.rs and search by feature name or flag. The result will show the stabilization version if stable, or indicate it's unstable with links to tracking issues and documentation paths.

Question 2

How to add a missing feature to caniuse.rs?

Accepted Answer

Follow the contributing guidelines: run the site locally with cargo xtask serve, then add feature data by specifying fields like title, flag, and RFC ID in the project's data files, as detailed in the README.

Question 3

Is caniuse.rs data accurate and up-to-date?

Accepted Answer

Data is community-sourced from official Rust resources like RFCs and PRs, but users should verify critical info against the official Rust documentation, as updates depend on contributions.

Question 4

caniuse.rs vs rust-lang.org documentation for feature lookup?

Accepted Answer

caniuse.rs offers a centralized, searchable interface for quick stability checks, while rust-lang.org provides comprehensive API details but requires more navigation. Use caniuse.rs for version planning and rust-lang.org for in-depth usage.

Question 5

What tools do I need to run caniuse.rs locally?

Accepted Answer

You need cargo, wasm-pack, rollup, and npm installed. Then execute cargo xtask serve to build and serve the site at http://localhost:8000 for testing or contributions.

Question 6

Are there command-line alternatives to caniuse.rs?

Accepted Answer

Yes, tools like rustc itself with feature flags or manual checks in the Unstable Book exist, but caniuse.rs provides a user-friendly web interface focused on feature stability across versions.

caniuse.rs

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