June 5, 2026
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- 3 contributors have changed 39 files with 1,176 additions and 27 deletions in 4 commits (
next...v8.0.2) - 19,806 total features
- 1,254 total contributors
- 5,681 total stargazers
May 29, 2026
- 2 contributors have changed 1 file with 89 additions and 0 deletions in 1 commit (
next...v8.0.1) - 19,752 total features
- 1,251 total contributors
- 5,679 total stargazers
May 22, 2026
This release introduces two breaking changes in the TypeScript definitions. The shape of the published data.json has not changed.
Summary: The published TypeScript definitions (types.d.ts) now fully match the actual shape of the published data.json. Two existing types are now stricter.
1. source_file is now required on CompatStatement (#29041)
Previously, the CompatStatement.source_file property was optional in the TypeScript definitions, even though it is always present in published data.json releases (it is generated at build time).
Now, source_file is typed as required, matching the actual shape of the data.
Impact: You may need to remove checks for a missing source_file (e.g. if (compat.source_file)).
2. BrowserStatement.upstream is narrowed to UpstreamBrowserName (#29041)
Previously, the BrowserStatement.upstream property was typed as BrowserName, allowing any of the 17 known browser keys.
Now, upstream is typed as the new UpstreamBrowserName, a subset of BrowserName containing only the browsers that other browsers actually derive from: "chrome" | "chrome_android" | "firefox" | "safari" | "safari_ios".
Impact: You may need to widen the type when passing upstream into functions expecting a full BrowserName, or switch on the narrower set.
- 2 contributors have changed 91 files with 1,681 additions and 784 deletions in 1 commit (
v7.3.17...v8.0.0) - 19,752 total features
- 1,250 total contributors
- 5,671 total stargazers