Repository Issues
Microsoft/TypeScript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
Issues
Open
Destructuring into an empty object vs an object with existing properties yields different results
BugDomain: check: Excess Property CheckingHelp Wanted
No assignee yetHas a beginner-friendly labelContributing guide available
3 comments1 reaction0 assignees
Open
Using JSX syntax in a namespace may incorrectly use the exported members of the current namespace as intrinsic elements (starting with a lowercase letter)
BugDomain: JSX/TSXHelp Wanted
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available
0 comments0 reactions0 assignees
Open
Invalid import path rewrite in declaration file
BugDomain: Declaration EmitHelp Wanted
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available
0 comments3 reactions0 assignees
Open
Mixin with abstract class infers wrong type for super
BugDomain: classesHelp Wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
1 comment2 reactions0 assignees
Open
Mapped type with enum keys emits string keys in d.ts type, but uses enum keys in .ts type
BugDomain: Declaration EmitHelp Wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
3 comments0 reactions0 assignees
Open
Incorrect static method overload inheritance between TypeScript and JavaScript with JSDoc
BugDomain: JSDocHelp Wanted
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available
0 comments0 reactions0 assignees
Open
Infinite type instantiation around recursive conditional types
BugDomain: check: Type CircularityHelp Wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
1 comment1 reaction0 assignees
Open
Certain homomorphic mappings break assignability with exactOptionalPropertyTypes
Domain: flag: exactOptionalPropertyTypesHelp WantedPossible Improvement
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
2 comments0 reactions0 assignees
Open
Regression: incorrect return type when disabled strictNullChecks
Domain: check: Type InferenceHelp WantedPossible Improvement
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available
0 comments0 reactions0 assignees
Open
Destructuring a possibly `undefined` object not caught, throws an error at runtime
BugDomain: check: Control FlowHelp Wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
3 comments1 reaction0 assignees
Open
Assertion signature on generics doesn't narrow
BugDomain: check: Control FlowHelp Wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
13 comments0 reactions0 assignees
Open
Destructuring object with generic key should reject undefined
BugDomain: check: Control FlowHelp Wanted
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available
0 comments2 reactions0 assignees
Open
JSDoc with @extends, type parameter and member expression gives wrong dts output
BugDomain: JSDocHelp Wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
1 comment0 reactions0 assignees
Open
[Control flow] Array filter with typeguard works differently following array initial value
Domain: check: Control FlowHelp WantedPossible Improvement
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
1 comment0 reactions0 assignees
Open
undefined is narrowed away incorrectly
BugDomain: check: Control FlowHelp Wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
3 comments0 reactions0 assignees
Open
Bug: null can be excluded by !== null in flow before typeof === 'object', but not excluded by predicate function.
Domain: check: Control FlowHelp WantedPossible Improvement
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available
0 comments0 reactions0 assignees
Open
Predicates break arbitrarily when intersected with some types. (Probably when the predicate is generic).
BugDomain: IntersectionHelp Wanted
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available
0 comments0 reactions0 assignees
Open
Function expression or method is not inferable when we have mapped type with a conditional type
Domain: check: Type InferenceHelp WantedPossible Improvement
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
2 comments0 reactions0 assignees
Open
Interface that extends another no longer constrains types like the original
BugDomain: check: Type InferenceHelp Wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available
1 comment0 reactions0 assignees
Open
Source mappings are missing for serialized properties
BugDomain: Declaration EmitHelp Wanted
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available
0 comments2 reactions0 assignees