Top TypeScript issues

Insufficient type narrowing of object with a union property

Duplicate
KevinWuWon picture KevinWuWon·17 Sep 2019·11 Comments

Use any instead of unknown for AsyncGenerator optional .next parameter

Needs Investigation
Jamesernator picture Jamesernator·17 Sep 2019·1 Comments
👍2 👀1

map.().filter() should not error on undefined values

nickofthyme picture nickofthyme·12 Sep 2019·7 Comments

Automated Migration for Breaking Changes to the Type System

Needs Proposal Suggestion
mheiber picture mheiber·10 Sep 2019·7 Comments
❤11

Unexpected behavior of conditional types on generics

Duplicate
nscarcella picture nscarcella·7 Sep 2019·5 Comments

Generics are not propagated in higher order function with constraint

Bug Fix Available
OliverJAsh picture OliverJAsh·4 Sep 2019·2 Comments

variance of subtyping

Design Limitation
xiaoxiangmoe picture xiaoxiangmoe·4 Sep 2019·5 Comments
👍2

Narrow object by property

Duplicate
MicahZoltu picture MicahZoltu·3 Sep 2019·16 Comments
👍1

Resolving hoisted `typeRoots` paths

Needs Proposal Suggestion
harrysolovay picture harrysolovay·1 Sep 2019·5 Comments
👍14

Inconsistency with boolean negation as `void` type guards with `--strictNullChecks`

Bug
timhwang21 picture timhwang21·1 Sep 2019·11 Comments
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