Rare find
Type Fest. A collection of useful TypeScript type definitions you can reuse in your projects.
github.com/sindresorhus/type-fest
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Updates
July 2026
- `Writable`: Fix behavior with index signatures (#1470)
- `Jsonify`: Fix optional properties leaking `undefined` into the key s…
- `IsLiteral*`: Fix behavior with unions (#1482)
- Add TS 7 to CI (#1488)
- Fix typo (#1487)
- Release —
- 5.8.0
June 2026
- `LastArrayElement`: Fix handling of tuples with optional elements (#1…
- `Schema`: Fix it to correctly replace `any` and `unknown` fields (#1…
- `IfNotAnyOrNever`: Lazily evaluate different conditional branches (#1…
- Add `StringToArray` and `StringLength` types (#1457)
- Migrate to snapshot testing for `lint-processors/jsdoc-codeblocks.tes…
- Split lint into a separate job (#1454)
- `StringRepeat`: Fix behavior with extremely large/small counts (#1455)
- Add `StringToNumber` type (#1446)
- Allow adding `-Infinity` as a twoslash type in JSDoc codeblocks (#1453)
- `StringRepeat`: Add support for generating really long strings (#1447)
- Add `ExtractExactly` type (#1445)
May 2026
- Release —
- 5.7.0
- Add `RemoveSuffix` type (#1439)
- Add `UnwrapRequired` type (#1410)
- `RemovePrefix`: Remove incorrect optimization and always fallback to …
- `TupleOf`: Improve implementation (#1441)
- `DelimiterCase`: Fix behavior with non-single character delimiters (#…
- `RemovePrefix`: Fix `any` prefix behavior in non-strict mode (#1423)
- `DelimiterCase`: Fix behavior with union delimiters (#1422)
April 2026
- `ApplyDefaultOptions`: Fix behavior with generic instantiations & `an…
- Release —
March 2026
- Release —