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tsc --build false negative through export star facade project

Status: Open.

#63579 In microsoft/TypeScript;

· jasonkuhrt opened on Jun 23, 2026

Unexpectedly narrow implicit generator type

Status: Open.

#63578 In microsoft/TypeScript;

· badeball opened on Jun 23, 2026

Hover documentation for parameters documented with jsdoc renders improperly

Experience EnhancementNoncontroversial enhancementsNoncontroversial enhancements

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#63573 In microsoft/TypeScript;

· SirzBenjie opened on Jun 22, 2026

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Backlog

Regression: 7.0.1-RC Unable to Satisfy Recursive Mapped Type Constraint

Status: Open.

#63568 In microsoft/TypeScript;

· sinclairzx81 opened on Jun 20, 2026

TypeScript doesn't consider contravariance in member functions even with strictFunctionTypes

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

Status: Open.

#63566 In microsoft/TypeScript;

· alecov opened on Jun 19, 2026

export modifier on enum disables This condition will always return * ts2845

BugA bug in TypeScriptA bug in TypeScript

Status: Open.

#63565 In microsoft/TypeScript;

· eps1lon opened on Jun 18, 2026

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Backlog

Generator functions may not return IteratorObject

Status: Open.

#63561 In microsoft/TypeScript;

· laverdet opened on Jun 16, 2026

Quadratic duplicate declaration accumulation in intersection constructor properties can crash with RangeError

Domain: PerformanceReports of unusually slow behaviorReports of unusually slow behavior

Possible ImprovementThe current behavior isn't wrong, but it's possible to see that it might be better in some casesThe current behavior isn't wrong, but it's possible to see that it might be better in some cases

Status: Open.

#63560 In microsoft/TypeScript;

· canonic-epicure opened on Jun 16, 2026

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Backlog

Incorrect type resolution with nested constructors

BugA bug in TypeScriptA bug in TypeScript

Fix AvailableA PR has been opened for this issueA PR has been opened for this issue

Status: Open.

#63559 In microsoft/TypeScript;

· Mudloop opened on Jun 16, 2026

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Dormant

Partial generic types get resolved completely incorrectly

Status: Open.

#63558 In microsoft/TypeScript;

· Mudloop opened on Jun 15, 2026

Overload missing from createElementNS

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

Possible ImprovementThe current behavior isn't wrong, but it's possible to see that it might be better in some casesThe current behavior isn't wrong, but it's possible to see that it might be better in some cases

Status: Open.

#63556 In microsoft/TypeScript;

· mozesstumpf opened on Jun 15, 2026

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Backlog

Quadratic check time for diamond-shaped interface inheritance graphs

Domain: PerformanceReports of unusually slow behaviorReports of unusually slow behavior

Possible ImprovementThe current behavior isn't wrong, but it's possible to see that it might be better in some casesThe current behavior isn't wrong, but it's possible to see that it might be better in some cases

Status: Open.

#63555 In microsoft/TypeScript;

· canonic-epicure opened on Jun 15, 2026

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Backlog