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microsoft/TypeScript

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

109.7K stars 13.6K forks 109.7K watchers TypeScript Apache License 2.0
javascript language typechecker typescript
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100 Open Issues Need Help Last updated: Jul 10, 2026

Open Issues Need Help

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The `options` arg of `Temporal.ZonedDateTime.prototype.toLocaleString()` currently accepts "illegal" option `timeZone` about 6 hours ago
Bug Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Add type definition for Math.sumPrecise (ES2025 / TC39 proposal) about 7 hours ago
Bug Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Intellisense keeps crashing about 7 hours ago
Bug Needs More Info Help Wanted Domain: LS: TSServer Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Certain recursive types cause "Maximum call stack size exceeded" error in TS server about 7 hours ago
Bug Help Wanted Domain: Indexed Access Types Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Ghost error appearing after signature help in inferred signatures with rest parameter about 7 hours ago
Bug Help Wanted Domain: check: Error Instability Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
HTMLElement inherits onerror and addListener("error" definitions that are unique to Window about 7 hours ago
Bug Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Intl.Collator#compare method type does not match spec about 7 hours ago
Bug Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
strange interaction with `resolveJsonModule`, `createRequire`, naming it `require`, and requiring JSON about 8 hours ago
Bug Needs More Info Help Wanted Domain: Node ESM Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Inconsistent types between Document scrollingElement and documentElement about 8 hours ago
Bug Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
MIDIMessageEvent data is incorrectly typed about 8 hours ago
Bug Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Error when accessing CSS property value using kebab case in `CSSStyleDeclaration` object about 9 hours ago
Bug Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Consider making `WritableStreamDefaultWriter.write()` contravariant about 9 hours ago
Bug Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
texSubImage2D missing WebGL2 syntax about 9 hours ago
Bug Needs More Info Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
TS 5.4.5: Return type for performance.getEntriesByType is inaccurate about 9 hours ago
Bug Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Auto-closing of tags within curly braces `{}` does not work when parent element is same tag in JSX about 9 hours ago
Bug Needs More Info Help Wanted Domain: JSX/TSX Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Change type of `File` constructor parameter `fileBits` to `Iterable<BlobPart>` about 9 hours ago
Bug Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Intl.NumberFormat does not model required properties when `style` is set to `currency` about 9 hours ago
Bug Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Typings for navigator.connection gone since TS 4.8 about 9 hours ago
Bug Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
MediaStream API should support pan, zoom and tilt about 9 hours ago
Bug Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Update lib.dom.d.ts: `MutationObserverInit.attributeFilter` can accept an iterator about 10 hours ago
Bug Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Mirror cursor for JSX stops working in some case about 10 hours ago
Bug Help Wanted Domain: JSX/TSX Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Unexpected "used before its declaration" error when implementing a exported type of a merged namespace about 10 hours ago
Bug Needs More Info Help Wanted Domain: Binder Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Notes about `String.replace` about 10 hours ago
Bug Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
`autocapitalize` type is incorrect according to MDN about 10 hours ago
Bug Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Comment referencing an undefined `ClassDecoratorFunction` type about 10 hours ago
Bug Help Wanted Docs Domain: Decorators Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Unknown interface "ClassMethodDecoratorFunction" in documentation for 5.0.4 lib.decorators.d.ts about 10 hours ago
Bug Help Wanted Docs Domain: Decorators Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Please Allow Mixins to function properly with new-able types about 10 hours ago
Bug Needs More Info Help Wanted Domain: JSDoc Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
`Date.getVarDate()` function seems incorrectly defined about 11 hours ago
Bug Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Type-asserting function call on variable initialized using `this` causes false implicit-any in VSCode about 11 hours ago
Bug Needs More Info Help Wanted Domain: This-Typing Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Spread operator with wrong optional property raises error on incorrect source line about 11 hours ago
Bug Needs More Info Help Wanted Domain: Related Error Spans Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Repeated single line comment after variable declaration in if/for block when targeting ES5 about 11 hours ago
Bug Help Wanted Domain: Comment Emit Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Confusing missing property error in a circular situation about 17 hours ago
Help Wanted Domain: Mapped Types Possible Improvement
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Type is not referred correctly in the while loop 3 days ago
Bug Help Wanted Domain: check: Control Flow
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Document that compiler.extends can be an array 5 days ago
Help Wanted Docs
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Confusing error message for labels used before definition 5 days ago
Suggestion Help Wanted Good First Issue Effort: Moderate Domain: Error Messages Experience Enhancement
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Regression: Generic function returning union of tuples is not assignable to identical type since v4.2 6 days ago
Help Wanted Domain: check: Type Inference Possible Improvement
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Support source phase imports 7 days ago
Suggestion Help Wanted Committed
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Improve inference in the presence of context-sensitive expressions 8 days ago
Suggestion Help Wanted Experimentation Needed
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
JsDoc with overloads and different generics results in wrong dts output 9 days ago
Bug Help Wanted Domain: JSDoc
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Bad parsing behaviour for generic arrow type arguments in class heritage / JSX open element 10 days ago
Bug Help Wanted Domain: Parser
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Combination of intersection type, mapped type and generic type seem to break type checks for nested properties 10 days ago
Bug Help Wanted Domain: Mapped Types Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Document the Iterator, Iterable, IterableIterator types 10 days ago
Bug Help Wanted Domain: lib.d.ts Docs Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Docs of `charCodeAt` and `codePointAt` are flipped 10 days ago
Bug Help Wanted Domain: lib.d.ts Docs Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
window.opener should not be typed as any 10 days ago
Bug Help Wanted Domain: lib.d.ts Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Conflicting declaration merging doesn't fail in .d.ts files 11 days ago
Bug Help Wanted Domain: Binder Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Missing Intl.Locale.prototype.getWeekInfo() 12 days ago
Bug Help Wanted Domain: lib.d.ts
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Parsing issue for call expression with type arguments following left-shift 15 days ago
Bug Help Wanted Domain: Parser
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Confusing error message (2322), should use (2741) and (2322) error message when this["XXX"] = {...} has a missing (or mispelled) key or an incompatible value. 18 days ago
Bug Help Wanted Domain: Error Messages
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
`lib.dom.d.ts`: Keyframe interface should allow CSS Typed Object Model objects like CSSTransformValue, etc 18 days ago
Bug Help Wanted Domain: lib.d.ts
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Corsa differences in `export=` module augmentation 18 days ago
Help Wanted
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Scope of this is lost when passing a member function to setInterval 18 days ago
Suggestion Help Wanted Domain: lib.d.ts Good First Issue
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Flag boolean in comparison operator operands as errors 18 days ago
Suggestion Help Wanted Good First Issue
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Dangerous "name" (and potentially others) global 18 days ago
Suggestion Help Wanted Committed Domain: lib.d.ts Good First Issue
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Sort jsdoc parameter suggestions by argument position 18 days ago
Suggestion Help Wanted Good First Issue Domain: LS: Completion Lists VS Code Tracked
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Cannot Load Custom Definition File in Repository 18 days ago
Suggestion Help Wanted Good First Issue Domain: Error Messages
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Enum keys not accepted as computed properties if their name is not a valid identifier 18 days ago
Bug Good First Issue Domain: enum
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
TS2367: This condition will always return 'false' since the types 'Constructor<T>' and 'typeof Child' have no overlap. 18 days ago
Suggestion Help Wanted Good First Issue Domain: Error Messages Experience Enhancement
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
TS is overly picky when declaring a class constructor type 18 days ago
Bug Help Wanted Good First Issue Domain: classes
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
'declare method' quick fix for adding a private method 18 days ago
Suggestion Help Wanted Good First Issue
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
DOM: `Element#matches()` incorrectly narrows types 18 days ago
Help Wanted Domain: lib.d.ts
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Should not allow `import.defer?.('x')` 18 days ago
Bug Help Wanted Domain: Parser
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
TS1518 depends on operand order in negated v-mode class unions 18 days ago
Bug Help Wanted Domain: Parser
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
`Array.prototype.at` docs use "code unit" instead of "item" 18 days ago
Help Wanted Domain: lib.d.ts
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Type narrowing not working correctly with Uppercase<string> & Lowercase<string> 18 days ago
Bug Help Wanted Domain: check: Control Flow
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
`importHelpers` incorrectly requires `tslib` for native `#private` class members at every dated `target` (ES2022–ES2025), even though no helper is ever emitted 18 days ago
Bug Help Wanted Domain: tslib and Helper Functions
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
No error for undeclared #private property in `.js` files 24 days ago
Bug Help Wanted Effort: Moderate Domain: JavaScript Needs Human Review
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Give a better error message when an import isn't found but a namespace of the same name exists 25 days ago
Bug Help Wanted Effort: Moderate Domain: Error Messages
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Narrow subtype-reduction-prone unions to their narrowest constituent 26 days ago
Bug Help Wanted Domain: check: Control Flow
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Suggestion: a built-in TypedArray interface 30 days ago
Suggestion Help Wanted Domain: lib.d.ts
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
'Omit' should alias a distinct mapped type (for display purposes) 30 days ago
Suggestion Help Wanted Effort: Moderate Experience Enhancement
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Document --incremental and composite project APIs 30 days ago
Help Wanted Domain: API Docs
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Specialize JSX error messages for missing properties 30 days ago
Help Wanted Effort: Moderate Domain: JSX/TSX Domain: Error Messages Experience Enhancement Rescheduled
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Update `TypedArray` constructors to disallow invalid `(typedArray, byteOffset, byteLength)` 30 days ago
Bug Help Wanted Domain: lib.d.ts
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Inlay hints look awkward for callback parameters with a single parameter 30 days ago
Suggestion Help Wanted Experience Enhancement Rescheduled Domain: LS: Inlay Hints
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Inverted `Promise` should warn like it does without inverting 30 days ago
Suggestion Help Wanted Experience Enhancement
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Enum value `1 / 0` incorrectly transformed if there is `Infinity` declared in scope 30 days ago
Bug Help Wanted Domain: enum
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Indexing/element access on `super` avoids instance property checks 30 days ago
Bug Help Wanted Rescheduled Effort: Casual Domain: classes
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Crashes on transform and parse (from assertion/debug failures) 30 days ago
Bug Help Wanted Domain: API: Transforms Crash Effort: Casual
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Unexpected "'Type' is declared but its value is never read." error with jsdoc @import syntax 30 days ago
Bug Help Wanted Domain: JSDoc
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Intellisense: deprioritise native function methods 30 days ago
Suggestion Help Wanted Experience Enhancement
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Add types for `String.{matchAll,replaceAll}` with a well known symbol 30 days ago
Help Wanted Domain: lib.d.ts Possible Improvement
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Error: Debug Failure. No error for last overload signature 30 days ago
Bug Help Wanted Domain: check: Variance Relationships
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
`using` transform throws when a for body binding shadows the for head binding 30 days ago
Bug Help Wanted Domain: API: Transforms
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Namespaces: use before declaration is not reported 30 days ago
Bug Help Wanted Domain: check: Control Flow
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Incorrect type declarations for a constant inside a namespace merged with an enum 30 days ago
Bug Help Wanted Domain: Declaration Emit
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Diagnostic code `69010` may be typo of `6910`? 30 days ago
Bug Help Wanted Domain: Error Messages
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
JSDoc `@import` causes `getCompletionEntryDetails` to crash 30 days ago
Bug Help Wanted Domain: JSDoc
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
"await x as any" - Node PartiallyEmittedExpression did not pass test 'isLeftHandSideExpression' assert triggered 30 days ago
Bug Help Wanted Domain: API: Transforms
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
[isolatedDeclarations] function expressions as an argument to a function call that is exported are reported as needing an annotation 30 days ago
Help Wanted Possible Improvement Domain: flag: isolatedDeclarations
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
JSX Fragments are in-properly typed with `<></>` syntax, when using `react-jsx` JSX option 30 days ago
Bug Help Wanted Domain: JSX/TSX
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Using declarations like a statement leads to strange bugs. 30 days ago
Bug Help Wanted Domain: check: Control Flow
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Crash: RangeError: Maximum call stack size exceeded in addTypesToUnion when using incomplete keyof type annotation on object destructuring 30 days ago
Bug Help Wanted Domain: Crashes
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Double error message when referencing variable of type union of string literals from ambient declaration 30 days ago
Help Wanted Domain: Error Messages Possible Improvement
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Crash: RangeError: Maximum call stack size exceeded in isReachableFlowNodeWorker with complex for loop headers about 1 month ago
Bug Help Wanted Domain: check: Control Flow
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
ES2025 regex syntax (duplicate named groups, pattern modifiers) is not gated by `target` about 1 month ago
Bug Help Wanted Domain: Parser
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
False positive on destructured `require` is `verbatimModuleSyntax` and `module` is `preserve` about 1 month ago
Bug Help Wanted Domain: ES Modules
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Certain conditional types allow unsound assignments about 2 months ago
Bug Help Wanted Domain: Conditional Types Cursed?
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
Incorrect inference/autocompletion on generic arrays, when values can be inferred from a defined object. about 2 months ago
Suggestion Help Wanted Effort: Moderate Domain: LS: Completion Lists Experience Enhancement Experimentation Needed
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
JSDoc for properties of intersected types is no longer merged 2 months ago
Bug Help Wanted Domain: LS: Quick Info
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript
TS2742 “The inferred type of 'default' cannot be named” with ESLint `defineConfig` 3 months ago
Help Wanted Domain: Declaration Emit Possible Improvement
microsoft/TypeScript
109.7K

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

TypeScript
#javascript#language#typechecker#typescript