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

..

content

Answer undefined for missing Record and index-signature keys

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

public

init

2026-07-22 18:08:04 -05:00

scripts

Split the Limitations page into partials

2026-10-15 04:31:49 -05:00

src

Match Node 24 in events and timers/promises

2026-10-17 17:48:42 -05:00

test

Add InternTable, a shared append-only table of published values

2026-10-15 19:59:56 -05:00

.gitignore

docs: migrate to Geistdocs (#611)

2026-10-02 00:58:25 -05:00

next.config.mjs

docs: migrate to Geistdocs (#611)

2026-10-02 00:58:25 -05:00

package.json

docs: migrate to Geistdocs (#611)

2026-10-02 00:58:25 -05:00

pnpm-lock.yaml

docs: migrate to Geistdocs (#611)

2026-10-02 00:58:25 -05:00

pnpm-workspace.yaml

init

2026-07-22 18:08:04 -05:00

postcss.config.mjs

init

2026-07-22 18:08:04 -05:00

source.config.ts

Split the Limitations page into partials

2026-10-15 04:31:49 -05:00

tsconfig.json

docs: migrate to Geistdocs (#611)

2026-10-02 00:58:25 -05:00