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Cannot extract base type from branded intersection

Status: Open.

#62985 In microsoft/TypeScript;

· shkumbinhasani opened on Jan 13, 2026

<code>disallowClassExpressions</code>

Out of ScopeThis idea sits outside of the TypeScript language design constraints This idea sits outside of the TypeScript language design constraints

SuggestionAn idea for TypeScript An idea for TypeScript

Status: Open.

#62977 In microsoft/TypeScript;

· valler opened on Jan 12, 2026

Nested Branded type does not error

DuplicateAn existing issue was already created An existing issue was already created

Status: Open.

#62976 In microsoft/TypeScript;

· nitzcard opened on Jan 11, 2026

SkipLibCheck isn't working on erasableSyntaxCheck

Working as IntendedThe behavior described is the intended behavior; this is not a bug The behavior described is the intended behavior; this is not a bug

Status: Open.

#62975 In microsoft/TypeScript;

· wparad opened on Jan 11, 2026

Crash: TypeError: Cannot read properties of undefined (reading 'flags') in isFreshLiteralType during recursive tuple expansion with unresolved identifiers

BugA bug in TypeScript A bug in TypeScript

Help WantedYou can do this You can do this

Status: Open.

#62974 In microsoft/TypeScript;

· na7ure-a opened on Jan 11, 2026

·

Backlog

<code>errorType</code> does not propagate with non-distributive conditional types

Not a DefectThis behavior is one of several equally-correct options This behavior is one of several equally-correct options

Status: Open.

#62972 In microsoft/TypeScript;

· mizdra opened on Jan 10, 2026

<code>Intl.CollatorOptions['collation']</code> is missing value <code>'default'</code>

BugA bug in TypeScript A bug in TypeScript

Domain: lib.d.tsThe issue relates to the different libraries shipped with TypeScript The issue relates to the different libraries shipped with TypeScript

Status: Open.

#62970 In microsoft/TypeScript;

· quisido opened on Jan 10, 2026

·

Backlog

JSDoc comments for async_hooks are confusing/misleading

Experience EnhancementNoncontroversial enhancements Noncontroversial enhancements

Help WantedYou can do this You can do this

SuggestionAn idea for TypeScript An idea for TypeScript

Status: Open.

#62967 In microsoft/TypeScript;

· a-non-a-mouse opened on Jan 9, 2026

·

Backlog

Regression: RangeError: Maximum call stack size exceeded in type instantiation with recursive types and intersections

BugA bug in TypeScript A bug in TypeScript

Help WantedYou can do this You can do this

Status: Open.

#62966 In microsoft/TypeScript;

· na7ure-a opened on Jan 8, 2026

·

Backlog

<code>@deprecated</code> on property getter and setters.

BugA bug in TypeScript A bug in TypeScript

Domain: LS: Type DisplayBugs relating to showing types in Quick Info/Tooltips, Signature Help, or Completion Info Bugs relating to showing types in Quick Info/Tooltips, Signature Help, or Completion Info

Status: Open.

#62965 In microsoft/TypeScript;

· Danielku15 opened on Jan 8, 2026

·

Backlog

Transition to 6.0 Maintenance Mode

Meta-IssueAn issue about the team, or the direction of TypeScript An issue about the team, or the direction of TypeScript

Status: Open.

#62963 In microsoft/TypeScript;

· RyanCavanaugh opened on Jan 8, 2026

Initializing tsconfig.json hangs

Needs More InfoThe issue still hasn't been fully clarified The issue still hasn't been fully clarified

Status: Open.

#62960 In microsoft/TypeScript;

· uli-a opened on Jan 7, 2026