Chris Tate 2b6f15c7fa Answer undefined for missing Record and index-signature keys ...

A keyed or dot read of an index signature that misses now answers
undefined, as in Node, instead of aborting with "record has no key".
The read carries an explicit optional value through the same analysis
that already widens bindings, parameters, returns and fields for missing
array elements; TypeScript's static types are unchanged. Numeric reads
whose consumers treat undefined like NaN lower to plain doubles, and
nested reads and writes through a missing entry throw Node's TypeError.

Fixes #964
Co-authored-by: Quim T. <26749475+espetro@users.noreply.github.com>

2026-10-17 19:35:34 -05:00

..

docs

Compile JavaScript classes like TypeScript classes when their layout or JSDoc types allow it

2026-10-17 18:44:30 -05:00

limitations

Answer undefined for missing Record and index-signature keys

2026-10-17 19:35:34 -05:00