Open
Document that compiler.extends can be an array
DocsHelp Wanted
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Repository Issues
Microsoft/TypeScript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
Issues
Open
Using declarations like a statement leads to strange bugs.
BugDomain: check: Control FlowFix AvailableHelp Wanted
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7 comments0 reactions0 assignees
Open
ES `ClassDecoratorContext.name` has incorrect value with static `name`
BugDomain: DecoratorsHelp Wanted
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Open
Why recommendedNo assignee yet · Has a beginner-friendly label
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Open
`silentNeverType` leak through return type inference
BugDomain: check: Type InferenceHelp Wanted
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Open
Spread operator fails to distribute over union when recursive type call is inlined instead of aliased
BugDomain: Conditional TypesHelp Wanted
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Open
Conditional type eagerly calculated to be invariant breaks referential transparency
BugCursed?Domain: check: Variance RelationshipsHelp Wanted
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4 comments0 reactions0 assignees
Open
Type parameter leak caused by `this` and reverse mapped type
BugDomain: This-TypingHelp Wanted
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Open
"Lookup" Type Broken When Using Generics
Domain: Mapped TypesHelp WantedPossible Improvement
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Open
Access base class protected methods in static block
BugDomain: classesHelp Wanted
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Open
Show incompatible union members in discriminated union discriminator errors
Experimentation NeededHelp WantedSuggestion
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3 comments1 reaction0 assignees
Open
Inconsistencies in assignability rules around top-level-like signatures
Cursed?Domain: check: Variance RelationshipsHelp WantedPossible Improvement
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Open
Recursive tuple cannot be computed through generic, but valid in a declarative form
BugDomain: check: Type CircularityHelp Wanted
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Open
Private constructor in mixin causes "Cannot read properties of undefined (reading 'declarations')"
BugDomain: classesHelp Wanted
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Open
TS2742 “The inferred type of 'default' cannot be named” with ESLint `defineConfig`
Domain: Declaration EmitHelp WantedPossible Improvement
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11 comments3 reactions0 assignees
Open
Incorrect report of self-referencing type for static fields
Domain: check: Type InferenceHelp WantedPossible Improvement
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Open
Inconsistencies in ESM-style imports of accessibility-modified properties from CJS-exported classes
BugDomain: ES ModulesHelp Wanted
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Open
Discriminated union with 11+ items does not handle nullability same as union with <10 items
BugDomain: check: Big UnionsHelp Wanted
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Open
Certain recursive types cause "Maximum call stack size exceeded" error in TS server
BugDomain: Indexed Access TypesHelp Wanted
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Open
Common fields of union not resolved for generic conditional with `any` branch
BugDomain: Conditional TypesHelp Wanted
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