2 Releases published by 1 person

• v5.8-rc TypeScript 5.8 RC

  published Feb 28, 2025

• v5.8.2 TypeScript 5.8

  published Feb 28, 2025

15 Pull requests merged by 8 people

• Fix lib.includes('dom') check in containerSeemsToBeEmptyDomElement

  #61481 merged Mar 25, 2025

• Bump the github-actions group with 4 updates

  #61474 merged Mar 24, 2025

• Fix errors on type assertions in erasableSyntaxOnly

  #61452 merged Mar 19, 2025

• 🤖 Pick PR #61452 (Fix errors on type assertions in er...) into release-5.8

  #61453 merged Mar 19, 2025

• 🤖 Pick PR #61261 (Fixed accidentally reused comments ...) into release-5.8

  #61290 merged Mar 19, 2025

• 🤖 Pick PR #61342 (Rename type parameters when they ar...) into release-5.8

  #61345 merged Mar 19, 2025

• 🤖 Pick PR #61244 (Ban old-style type assertions under...) into release-5.8

  #61320 merged Mar 19, 2025

• 🤖 Pick PR #61392 (Fix serialization of accessor types...) into release-5.8

  #61423 merged Mar 19, 2025

• fix(60908): Unexpected "'Type' is declared but its value is never read." error with jsdoc @import syntax

  #60921 merged Mar 17, 2025

• Fix serialization of accessor types in declaration files.

  #61392 merged Mar 14, 2025

• Bump github/codeql-action from 3.28.10 to 3.28.11 in the github-actions group

  #61387 merged Mar 10, 2025

• LEGO: Pull request from lego/hb_5378966c-b857-470a-8675-daebef4a6da1_20250306202248269 to main

  #61368 merged Mar 6, 2025

• Rename type parameters when they are shadowed.

  #61342 merged Mar 4, 2025

• Bump the github-actions group with 2 updates

  #61333 merged Mar 3, 2025

• Ban old-style type assertions under erasableSyntaxOnly

  #61244 merged Feb 28, 2025

25 Pull requests opened by 12 people

• Handle `silentNeverType` in iteration-related functions

  #61317 opened Feb 28, 2025

• Update deps, TS 5.8, others

  #61340 opened Mar 3, 2025

• Fixed `isReadonlySymbol` check for intersection properties with `.valueDeclaration`

  #61346 opened Mar 4, 2025

• typeToString multiline

  #61349 opened Mar 4, 2025

• Properly discriminate by pattern literal types in `isTypeInvalidDueToUnionDiscriminant`

  #61350 opened Mar 4, 2025

• Fixed crash in `hasVisibleDeclarations` related to binding elements

  #61352 opened Mar 4, 2025

• fix(57026): Renaming on declaration whose name is a String Literal

  #61353 opened Mar 5, 2025

• fix: diagnostic message for class name 'Object' when targeting different ECMAScript versions

  #61358 opened Mar 5, 2025

• Bring back return type narrowing + fixes

  #61359 opened Mar 5, 2025

• Improve union origin preservation in filtering-unionizing binary expressions

  #61362 opened Mar 6, 2025

• Fixed nullish coalesce operator's precedence

  #61372 opened Mar 7, 2025

• Fixed an issue causing spurious "used before being assigned" errors in for of/in loops

  #61376 opened Mar 7, 2025

• Fixed references search for dynamic imports of indirect default exports

  #61379 opened Mar 8, 2025

• Improve references search and quick info on properties with type errors within nullable contextual types

  #61383 opened Mar 9, 2025

• Improve narrowing by `in` operator under `noUncheckedIndexedAccess` for variable properties

  #61393 opened Mar 11, 2025

• Sort unions without using type IDs

  #61399 opened Mar 11, 2025

• Implement erasable Enum Annotations

  #61414 opened Mar 13, 2025

• Sort symbol members

  #61420 opened Mar 14, 2025

• Fix to aggressive indentation for ternary operator #3676

  #61430 opened Mar 15, 2025

• Add types for `String.{matchAll,replaceAll}` with a well known symbol

  #61449 opened Mar 19, 2025

• Ban non-ambient namespaces written with `module` keyword

  #61450 opened Mar 19, 2025

• Add new release publisher yaml

  #61491 opened Mar 26, 2025

• Expandable hover

  #61492 opened Mar 27, 2025

• Support trailing commas in `typeof import()`

  #61495 opened Mar 27, 2025

• Fix IsolatedDeclarations annotations can duplicate comments

  #61497 opened Mar 28, 2025

89 Issues closed by 36 people

• Many HTML entities are not turned to Unicode by JSX

  #61494 closed Mar 27, 2025

• `T extends unknown` is observably-different from an unconstrained `T`

  #61242 closed Mar 27, 2025

• Regression in the way optional properties behave when there's an error in the property value

  #61382 closed Mar 27, 2025

• TS complains about assignability instead of narrowing

  #61465 closed Mar 27, 2025

• Can't index an object literal despite 'in'

  #61471 closed Mar 27, 2025

• Infer "stringable" or "numerable" objects without explicit declaration

  #61477 closed Mar 27, 2025

• [Feedback needed] Collaboration analysis for TypeScript

  #61487 closed Mar 26, 2025

• Enum reverse mapping is not generated

  #61488 closed Mar 26, 2025

• Should erasableSyntaxOnly prevent `const enum`s?

  #61490 closed Mar 26, 2025

• `containerSeemsToBeEmptyDomElement` does not check correctly for lib.dom.d.ts

  #61466 closed Mar 25, 2025

• Official archived version of the TypeScript Language Specification?

  #61485 closed Mar 25, 2025

• Inconsistent type inference in Promise chains between `await` and `.then()`

  #61475 closed Mar 25, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250323 vs 5.8.2

  #61473 closed Mar 24, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250323 vs 5.8.2

  #61472 closed Mar 24, 2025

• [NewErrors] 5.9.0-dev.20250323 vs 5.8.2

  #61470 closed Mar 24, 2025

• [NewErrors] 5.9.0-dev.20250316 vs 5.8.2

  #61432 closed Mar 24, 2025

• auto-import with `package.json#imports` does not take `moduleResolution` into account

  #60405 closed Mar 24, 2025

• require("path") does not have types for exports in .ts files

  #61468 closed Mar 24, 2025

• RegExMatchArray.groups does not allow an undefined value

  #61476 closed Mar 24, 2025

• Narrowing with `in` keyword and `const` identifier

  #61463 closed Mar 24, 2025

• Generic function constraints degrade in conditionas but work in higher order functions

  #61364 closed Mar 23, 2025

• TypeScript 5.5+ declaration of AbortSignal conflicts with Node.js v14 types

  #61447 closed Mar 23, 2025

• Class satisfies type

  #61324 closed Mar 23, 2025

• Records should not be assignable to Partial Records of incompatible types

  #61456 closed Mar 23, 2025

• Inconsistent behavior of the never return type between function and class method

  #61464 closed Mar 22, 2025

• Union type on object's property behaves different than having a union of the whole object with all possible values for this field

  #61202 closed Mar 22, 2025

• get property return type inferred incorrectly from 'this' type, when other methods exist

  #61361 closed Mar 22, 2025

• `T?` shortcut for `T | undefined`

  #61434 closed Mar 21, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250309 vs 5.8.2

  #61386 closed Mar 20, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250309 vs 5.8.2

  #61385 closed Mar 20, 2025

• [NewErrors] 5.9.0-dev.20250309 vs 5.8.2

  #61384 closed Mar 20, 2025

• Adding the focusVisible attribute to the FocusOptions

  #61458 closed Mar 20, 2025

• tsserver go to definition doesn't work as expected when `disableSourceOfProjectReferenceRedirect` is enabled

  #61451 closed Mar 20, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250316 vs 5.8.2

  #61435 closed Mar 20, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250316 vs 5.8.2

  #61437 closed Mar 20, 2025

• Module resolution: the `moduleResolution` compiler option seems set to be `bundler` when the `module` compiler option is set to `ES6`, `ES2015`, `ES2020`, `ES2022`, or `ESNext`.

  #61454 closed Mar 20, 2025

• git clone https://github.com/panntod/Whatsapp-Mentioned-All.git

  #61455 closed Mar 20, 2025

• Automatically Assign Constructor Parameters as Class Properties in TypeScript

  #61457 closed Mar 20, 2025

• Provide a core types Type (result of typeof)

  #61427 closed Mar 20, 2025

• Iteration Plan for 5.9?

  #61428 closed Mar 20, 2025

• ts will try to compile import files from a folder without reference or include

  #61440 closed Mar 20, 2025

• Strange error message when accessing undefined property of an enum

  #61431 closed Mar 20, 2025

• Class implementing interface implicit types

  #61425 closed Mar 20, 2025

• Incorrect narrowing of boolean type when variable is mutated in a timer

  #61445 closed Mar 18, 2025

• TS2551: Property XXX does not exist on type

  #61442 closed Mar 18, 2025

• Cannot find namespace 'config' or File '.../types.ts' is not a module.

  #61444 closed Mar 18, 2025

• JSDoc @import not detecting use in @callback

  #58368 closed Mar 17, 2025

• Unexpected "'Type' is declared but its value is never read." error with jsdoc @import syntax

  #60908 closed Mar 17, 2025

• dynamic import from module=none of an module=es2022 via barrel reemits it as commonjs

  #61316 closed Mar 17, 2025

• Omit Type

  #61408 closed Mar 17, 2025

• Array.isArray( ) with readonly []

  #61381 closed Mar 17, 2025

• CFA does not consider pass-by-reference to invalidate assumptions

  #61416 closed Mar 16, 2025

• TC39 Accessor Decorators unable to use `declare`

  #61418 closed Mar 14, 2025

• Still only the last overloaded signature is picked when passing an overloaded function to Array.map

  #61398 closed Mar 14, 2025

• Unbound type parameter in declaration files for accessors with divergent types.

  #61391 closed Mar 14, 2025

• Unresolved generic type arguments end up in type declarations since 5.7.2

  #61338 closed Mar 14, 2025

• Unreachable code breaks subsequent CFA

  #61419 closed Mar 14, 2025

• Inferred types for named capture groups in RegExp

  #61413 closed Mar 13, 2025

• `ReadableStreamGenericReader` is incompatible with @types/node

  #61390 closed Mar 13, 2025

• Api to Copilot

  #61412 closed Mar 13, 2025

• Array access possibly undefined with noUncheckedIndexedAccess despite findIndex

  #61388 closed Mar 13, 2025

• Unexpected "property is not assignable to type 'undefined'" on dynamic assignment

  #61409 closed Mar 12, 2025

• Mistake in the docs

  #57005 closed Mar 12, 2025

• Refactor `getTypeOfSymbol` for Improved Readability and Maintainability

  #61401 closed Mar 12, 2025

• When subclassing incorrectly, the compiler error suggests changing base class rather than the derived one

  #61407 closed Mar 12, 2025

• How should we interpret the compatibility between optional-never objects and normal objects?

  #61396 closed Mar 11, 2025

• A minimal custom transformer plugin proposal

  #54276 closed Mar 11, 2025

• Incorrect Type Inference for Array Properties in Recursive Type Definitions

  #61394 closed Mar 11, 2025

• Allow Type Extraction and/or Access from `#` Private Fields and Methods in TypeScript Classes

  #61397 closed Mar 11, 2025

• Unable to do module augmentation

  #61367 closed Mar 9, 2025

• Class incorrectly implements interface containing methods with optional parameters

  #61380 closed Mar 8, 2025

• Improper computed object key strictness inside loop

  #61377 closed Mar 8, 2025

• TypeScript not enforcing interface implementation when the interface and class share the same name

  #61370 closed Mar 8, 2025

• TS1166 reported for imported symbol as computed property name in generated d.ts

  #61360 closed Mar 7, 2025

• Refinement in async function

  #61365 closed Mar 6, 2025

• TS 5.8 JSX.ElementChildrenAttribute break

  #61354 closed Mar 6, 2025

• TS 5.8: False positives for conditional expression in return type check

  #61337 closed Mar 6, 2025

• JSDoc type is not narrowing a union (but typescript does)

  #61339 closed Mar 6, 2025

• Incorrect type narrowing for tuples

  #61332 closed Mar 6, 2025

• Type order is random in hover highlight dialog

  #61336 closed Mar 6, 2025

• Auto import does not work if installed as `devDependencies`

  #61319 closed Mar 5, 2025

• 5.8.2 generates incorrect d.ts for generics in static method

  #61334 closed Mar 4, 2025

• The typescript language service does not interpret "this" in object literals correctly.

  #61222 closed Mar 4, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250302 vs 5.8.2

  #61331 closed Mar 3, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250302 vs 5.8.2

  #61328 closed Mar 3, 2025

• [NewErrors] 5.9.0-dev.20250302 vs 5.8.2

  #61327 closed Mar 3, 2025

• JSX types should automatically pick setter types instead of getter types.

  #61329 closed Mar 3, 2025

• Object Spread { ...array } Incorrectly Assignable to number[]

  #61295 closed Mar 2, 2025

• #61082 breaks @uswds/uswds deep module resolution in DT

  #61322 closed Feb 28, 2025

59 Issues opened by 57 people

• Type inference for for..in loop as keyof object

  #61498 opened Mar 28, 2025

• Never-initialized variable type is not narrowed to undefined

  #61496 opened Mar 27, 2025

• Compiler crash with RangeError: Map maximum size exceeded

  #61493 opened Mar 27, 2025

• Trailing comma in dynamic import should be allowed also when used in a `typeof` type

  #61489 opened Mar 26, 2025

• TS has no way to import native modules with ESM syntax

  #61486 opened Mar 25, 2025

• "Find All References" shows all interface implementations instead of specific class method references

  #61484 opened Mar 25, 2025

• The type in Ternary Operator give a wrong value

  #61483 opened Mar 25, 2025

• Union of classes with same structure collapsed, leading to missing type errors

  #61482 opened Mar 25, 2025

• AllowSharedBufferSource definition is incorrect

  #61480 opened Mar 24, 2025

• RFC: `brand` Keyword for Structural Branded Types

  #61479 opened Mar 24, 2025

• RFC: Enhancing Type Aliases with `mut type` to Unify Type Definitions in TypeScript

  #61478 opened Mar 24, 2025

• Wrong import attribute typed as any, but should be typed as string

  #61469 opened Mar 23, 2025

• Explicit target type breaks generic parameter inference for function call with intersection return type

  #61467 opened Mar 23, 2025

• Local function variables are suggested within its default arguments

  #61461 opened Mar 21, 2025

• `InstanceType` and constructor return type inference doesn’t work for built‑in subtypes of `ErrorConstructor`

  #61460 opened Mar 21, 2025

• TypeScript code suggestions include inaccessible private fields from base classes

  #61462 opened Mar 21, 2025

• Add types for `String.{matchAll,replaceAll}` with a well known symbol

  #61448 opened Mar 19, 2025

• `T` is not assignable to `SomeType | Exclude<T, SomeType>` where `T` is a generic union type

  #61446 opened Mar 19, 2025

• Type alias circularly references itself

  #61443 opened Mar 18, 2025

• Allow `import.meta.url` when `module` is `node16` or `node18`

  #61441 opened Mar 17, 2025

• I triggered the Debug assertion `Revert #54442 and add a testcase with whatever triggered this` when running with `--diagnostics`

  #61438 opened Mar 17, 2025

• Type Conversion Error with Empty and Non-Empty Generic Types in Record Mapping

  #61436 opened Mar 16, 2025

• Support fuzzy search for "Go to Symbol in Workspace" for Javascript/Typescript

  #61439 opened Mar 16, 2025

• `{@link Class.name}` resolves wrongly to `Function.name`

  #61433 opened Mar 16, 2025

• Arithmetic operations on type-parameters subtyping `bigint` are incorrectly inferred to have type `number`

  #61429 opened Mar 15, 2025

• Intellisense: deprioritise native function methods

  #61426 opened Mar 15, 2025

• Potentially-`undefined` value not flagged when destructuring union of empty tuple and array

  #61424 opened Mar 14, 2025

• Typescript compiler hangs indefinitely

  #61422 opened Mar 14, 2025

• Using intersection types breaks type inference for function types

  #61417 opened Mar 13, 2025

• Allow tuple labels passed to `satisfies` to participate in type inference

  #61415 opened Mar 13, 2025

• Missing compiler error (or emit bug) in another isolatedModules + emitDecoratorMetadata use case

  #61411 opened Mar 13, 2025

• A flag to replace removed syntax with blank space

  #61410 opened Mar 12, 2025

• `transformTime` performance regression since 5.6.x

  #61406 opened Mar 12, 2025

• Unreliably report for unused local variable in the editor

  #61403 opened Mar 12, 2025

• require() is generated in JS although there's no runtime code

  #61395 opened Mar 11, 2025

• TS Perf degradation since last version upgrade

  #61400 opened Mar 10, 2025

• 'in' does not remove undefined from indexed value (with noUncheckedIndexedAccess)

  #61389 opened Mar 10, 2025

• `for`-`let` + inner function incorrectly says variable is used before being assigned

  #61375 opened Mar 7, 2025

• Add initializer property to JSDocParameterTag node

  #61373 opened Mar 7, 2025

• Add allowImportingJsExtensions option to prevent incorrect .js imports

  #61371 opened Mar 7, 2025

• The terms in the Refactor menu are not internationalized.

  #61374 opened Mar 7, 2025

• Manually constructed nullish coalescing AST is missing parentheses when printed

  #61369 opened Mar 7, 2025

• References from dynamic imports not recognized when indirectly exporting variable

  #61366 opened Mar 6, 2025

• Introduce `strictCustomConditions` option for custom `exports` / `imports` conditions with no fallback to other conditions if the file does not exist

  #61363 opened Mar 6, 2025

• Module resolution: `"node"` condition does not work when using `moduleResolution=bundler`

  #61357 opened Mar 5, 2025

• Module resolution: Full Node.js 23+ TS support

  #61355 opened Mar 5, 2025

• TS 5.8 TypeError: Cannot read properties of undefined (reading 'kind')

  #61351 opened Mar 4, 2025

• typeToString doesn't respect TypeFormatFlags.MultilineObjectLiterals

  #61348 opened Mar 4, 2025

• Intellisense doesn't narrow properly when discriminator is a template literal

  #61347 opened Mar 4, 2025

• Intersection for same key read-only property maybe wrong

  #61344 opened Mar 4, 2025

• BUG: TypeScript: `this.constructor` inside instance method (not `static`) inside `class` doesnt work in autocomplete

  #61356 opened Mar 4, 2025

• JSX types should automatically pick setter types instead of getter types.

  #61341 opened Mar 3, 2025

• Assigning window.location after 5.8.2 upgrade fails

  #61335 opened Mar 3, 2025

• Support for `JSON.rawJSON()`

  #61330 opened Mar 2, 2025

• `export import` of types is not allowed in namespaces when using `erasableSyntaxOnly`

  #61326 opened Mar 1, 2025

• Support for Import Maps

  #61325 opened Mar 1, 2025

• Suggestion: Support readonly interfaces in `getSuggestedLibFor...`

  #61323 opened Mar 1, 2025

• Add types for RegExp.escape

  #61321 opened Feb 28, 2025

• Spurious missing `Symbol.iterator` on `never` when `yield*`ing generic call within a generic call

  #61318 opened Feb 28, 2025

146 Unresolved conversations

Sometimes conversations happen on old items that aren’t yet closed. Here is a list of all the Issues and Pull Requests with unresolved conversations.

• fix(61258): Renaming namespace with const enum doesn't update enum references

  #61263 commented on Mar 18, 2025 • 6 new comments

• Fix for Issue 61081

  #61221 commented on Mar 7, 2025 • 4 new comments

• Fix the issue where modifying `extraFileExtensions` through `ProjectService.setHostConfiguration` in the plugin has no effect.

  #61303 commented on Mar 10, 2025 • 2 new comments

• support quick info and go to definition on mapped keys

  #61061 commented on Mar 12, 2025 • 1 new comment

• Add the type of Intl.DurationFormat to the lib.

  #60646 commented on Mar 9, 2025 • 1 new comment

• Show unused public properties and methods

  #29293 commented on Mar 23, 2025 • 0 new comments

• Find All References fails for CommonJS named exports in checkJs Mode

  #60094 commented on Mar 23, 2025 • 0 new comments

• Add option to include default typeRoots when overriding typeRoots

  #30855 commented on Mar 24, 2025 • 0 new comments

• Proposal: Partial Type Argument Inference

  #26242 commented on Mar 24, 2025 • 0 new comments

• Narrow object property indexed by bracket notation when the key is a known literal type, regardless of where the key comes from

  #61176 commented on Mar 24, 2025 • 0 new comments

• Poor type inference for `reduce`

  #25454 commented on Mar 24, 2025 • 0 new comments

• Error: Debug Failure. False expression.

  #52952 commented on Mar 24, 2025 • 0 new comments

• Template Literal Type JSX children prop issue

  #58799 commented on Mar 25, 2025 • 0 new comments

• Accept de-structured elements in type predicates

  #41173 commented on Mar 25, 2025 • 0 new comments

• Date.prototype.toJSON has incorrect return type

  #43639 commented on Mar 25, 2025 • 0 new comments

• Support Expandable Quick Info/Hover Verbosity

  #59029 commented on Mar 27, 2025 • 0 new comments

• disallow comparing to null and undefined unless they are valid cases in strict null mode

  #11920 commented on Mar 27, 2025 • 0 new comments

• Support @class in JSDoc

  #12681 commented on Mar 27, 2025 • 0 new comments

• Error inferring types of promise function

  #17873 commented on Mar 27, 2025 • 0 new comments

• this any typed in some JS object literals

  #22058 commented on Mar 27, 2025 • 0 new comments

• Suggestion: Type annotations and interfaces for function declarations

  #22063 commented on Mar 27, 2025 • 0 new comments

• Allow extending types referenced through interfaces

  #31843 commented on Mar 27, 2025 • 0 new comments

• Support source phase imports

  #61216 commented on Mar 19, 2025 • 0 new comments

• Talk about Exceptions Here

  #56365 commented on Mar 19, 2025 • 0 new comments

• CSS module support

  #46689 commented on Mar 19, 2025 • 0 new comments

• Auto-import priority rules

  #51155 commented on Mar 20, 2025 • 0 new comments

• Strict null checks for Map members

  #9619 commented on Mar 20, 2025 • 0 new comments

• export access modifiers

  #41316 commented on Mar 20, 2025 • 0 new comments

• tsc --init-basic

  #46150 commented on Mar 20, 2025 • 0 new comments

• Instantiable types from return types of contextual signatures don't provide contextual type information for return expressions

  #61197 commented on Mar 20, 2025 • 0 new comments

• Negated types

  #4196 commented on Mar 20, 2025 • 0 new comments

• Type annotation for all exports in the module

  #38511 commented on Mar 21, 2025 • 0 new comments

• tsserver should implement the Language Server Protocol

  #39459 commented on Mar 21, 2025 • 0 new comments

• Sourcemap - names array empty for all files

  #9627 commented on Mar 21, 2025 • 0 new comments

• 6.0 Deprecation Candidates

  #54500 commented on Mar 21, 2025 • 0 new comments

• SUGGESTION: add support for writeonly properties on interfaces

  #21759 commented on Mar 21, 2025 • 0 new comments

• Allow specifying exclude as a command line option

  #46005 commented on Mar 22, 2025 • 0 new comments

• Conditional type evaluation of type aliases produces different result than their equivalent substitution

  #48070 commented on Mar 22, 2025 • 0 new comments

• Allow wrapped values to be used in place of primitives.

  #2361 commented on Mar 23, 2025 • 0 new comments

• Error not issued when global type is an alias of an object type literal

  #57564 commented on Mar 27, 2025 • 0 new comments

• Inconsistent typechecking with require() in JS and TS

  #60032 commented on Mar 27, 2025 • 0 new comments

• Type safety with `TemplateStringsArray` and tag functions

  #33304 commented on Mar 27, 2025 • 0 new comments

• Spread operator should not have worse ergonomics than `apply` - unexpected error spreading a union-of-tuples

  #49802 commented on Mar 27, 2025 • 0 new comments

• Implicitly typed parameters of function properties of generic parameters break autocompletion

  #46916 commented on Mar 27, 2025 • 0 new comments

• Add math intrinsic types

  #48198 commented on Mar 12, 2025 • 0 new comments

• More specific TemplateStringsArray type for tagged templates

  #49552 commented on Mar 26, 2025 • 0 new comments

• Use iterators to avoid calculating all properties of UnionOrIntersectionType

  #53346 commented on Mar 1, 2025 • 0 new comments

• New `--enforceReadonly` compiler option to enforce read-only semantics in type relations

  #58296 commented on Mar 13, 2025 • 0 new comments

• Make TypeScript itself ESM-only, made possible by require(ESM)

  #58419 commented on Mar 19, 2025 • 0 new comments

• fix(59769): remapped properties ObjectLiteralMethodSnippet completion fixup

  #59770 commented on Mar 26, 2025 • 0 new comments

• Fixed single signature type instantiations leaking between calls with different mappers

  #59972 commented on Mar 2, 2025 • 0 new comments

• Fix #61098

  #61113 commented on Mar 19, 2025 • 0 new comments

• Implement(60881): Added detailed diagnostic for parent to child assignment

  #61145 commented on Mar 6, 2025 • 0 new comments

• Use comparability for discriminant properties when narrowing types for a default switch clause

  #61211 commented on Mar 12, 2025 • 0 new comments

• [WIP] Disallow merging of `enum` declarations

  #61262 commented on Mar 20, 2025 • 0 new comments

• Restrict indexed accesses on nonpublic fields of concrete types the same way we do generic ones

  #61291 commented on Feb 28, 2025 • 0 new comments

• Implicit Symbol.iterator call in for..of loops / spread destructuring doesn't infer `this` generic type parameter

  #38388 commented on Mar 27, 2025 • 0 new comments

• Support Intellisense for string/number literals in a widened union

  #33471 commented on Mar 27, 2025 • 0 new comments

• improper declared type cause narrow type not work when its computed type is not union.

  #39114 commented on Mar 27, 2025 • 0 new comments

• In JSDoc @type is not a type declaration, which it is much more like type conversion.

  #39650 commented on Mar 27, 2025 • 0 new comments

• Compile error if I named last array destructuring element.

  #41548 commented on Mar 27, 2025 • 0 new comments

• Error when trying to assign a subclass of a base class with generics to `typeof` of that base class

  #41770 commented on Mar 27, 2025 • 0 new comments

• Correctly handle generic functions (e.g.: `Object.freeze`) passed as callbacks to generic functions (e.g.: `Array.prototype.map`)

  #42862 commented on Mar 27, 2025 • 0 new comments

• Broken emit when `Infinity` or `‑Infinity` ends up in a type position

  #42905 commented on Mar 27, 2025 • 0 new comments

• Typescript 4.2.x - incorrectly infered generic return type of a record union (extra undefined)

  #43943 commented on Mar 27, 2025 • 0 new comments

• Support inferring `never` as the return type in JavaScript when overriding a class method that returns `never`

  #46791 commented on Mar 27, 2025 • 0 new comments

• Intersection causes incorrect type compatability

  #48720 commented on Mar 27, 2025 • 0 new comments

• Regression in 4.8 where string union type widens to string

  #50635 commented on Mar 27, 2025 • 0 new comments

• Order of ReadonlySet/ReadonlyMap in union causes differing key inference

  #52313 commented on Mar 27, 2025 • 0 new comments

• Expression produces a union type that is too complex to represent

  #53234 commented on Mar 27, 2025 • 0 new comments

• Crash when defining `Array` type via `[]` syntax

  #57009 commented on Mar 27, 2025 • 0 new comments

• mapped type with remapped keys unexpectedly widens type

  #57265 commented on Mar 27, 2025 • 0 new comments

• Inconsistent type inference on overloaded function types

  #57351 commented on Mar 27, 2025 • 0 new comments

• using `projectService.setHostConfiguration` in a plugin is invalid

  #61302 commented on Feb 28, 2025 • 0 new comments

• `Intl.DurationFormat` missing from library definitions

  #60608 commented on Mar 4, 2025 • 0 new comments

• Computing buildInfoTime even when !isIncremental

  #60500 commented on Mar 5, 2025 • 0 new comments

• Add caching to improve performance of rebuilds in --build mode

  #60701 commented on Mar 5, 2025 • 0 new comments

• Inaccurate error or buggy behavior for JSDoc @typedef tags

  #30155 commented on Mar 5, 2025 • 0 new comments

• rewriteRelativeImportExtensions & enforce consistent extensions

  #61021 commented on Mar 5, 2025 • 0 new comments

• List @deprecated strikethroughs in Problems tab

  #40604 commented on Mar 7, 2025 • 0 new comments

• Javascript: Object.assign to assign property values for classes is not respected

  #26792 commented on Mar 8, 2025 • 0 new comments

• `as enum` assertion for object literals

  #60790 commented on Mar 8, 2025 • 0 new comments

• TypeScripts Type System is Turing Complete

  #14833 commented on Mar 8, 2025 • 0 new comments

• Define 'tagName' values in Element interfaces to prevent misleading type acceptance.

  #45218 commented on Mar 9, 2025 • 0 new comments

• Decouple jsx element type from jsx factory return type and sfc return type

  #21699 commented on Mar 9, 2025 • 0 new comments

• Inferring a generic should put the type variable in the inner scope when possible

  #49505 commented on Mar 9, 2025 • 0 new comments

• Typescript Watch - Cleaning Target Files on Source Deletion

  #16057 commented on Mar 10, 2025 • 0 new comments

• Define a global context in a function signature, to enforce typing.

  #43434 commented on Mar 10, 2025 • 0 new comments

• TS:1379 An import alias cannot reference a declaration that was exported using 'export type'

  #54855 commented on Mar 10, 2025 • 0 new comments

• Allow to add a call signature to the Mapped Type OR to remove all `Function.prototype` methods

  #27575 commented on Mar 10, 2025 • 0 new comments

• Allow for optional index signatures (for the sake of `exactOptionalPropertyTypes`)

  #46969 commented on Mar 10, 2025 • 0 new comments

• Huge jump in tsc memory usage from 5.5.4 -> 5.6.2

  #60166 commented on Mar 10, 2025 • 0 new comments

• A mixin class must have a constructor with a single rest parameter of type 'any[]'.

  #37142 commented on Feb 28, 2025 • 0 new comments

• Computed property type is invalid in type emitted if it is a unique symbol coming from a property that has a space in the name

  #60823 commented on Feb 28, 2025 • 0 new comments

• Relate control flow to conditional types in return types

  #33912 commented on Feb 28, 2025 • 0 new comments

• Suggestion for Dependent-Type-Like Functions: Conservative Narrowing of Generic Indexed Access Result Type

  #33014 commented on Feb 28, 2025 • 0 new comments

• strange interaction with `resolveJsonModule`, `createRequire`, naming it `require`, and requiring JSON

  #61292 commented on Mar 1, 2025 • 0 new comments

• TS hangs up entire computer, type of variables stuck at "Loading..."

  #58373 commented on Mar 1, 2025 • 0 new comments

• Provide way to link to other files from JSDoc comments

  #47718 commented on Mar 1, 2025 • 0 new comments

• Feature Request: allow exclusion of node_modules when skipLibCheck is false

  #30511 commented on Mar 1, 2025 • 0 new comments

• Seeking Guidance: Significant performance regression within editor when upgrading typescript versions in large monorepo

  #60311 commented on Mar 3, 2025 • 0 new comments

• Regression performance compiling types in version 5.4.2

  #57710 commented on Mar 3, 2025 • 0 new comments

• [Feature Request] Allow Class Index Signatures to be mapped

  #49509 commented on Mar 3, 2025 • 0 new comments

• Allow --build with Intermediate Errors - shouldn't happen on tsconfig errors

  #59867 commented on Mar 3, 2025 • 0 new comments

• Type containing templated, branded string is not assignable to itself

  #61098 commented on Mar 3, 2025 • 0 new comments

• Ability to pick setter types (instead of getter types) in a mapped type

  #60162 commented on Mar 3, 2025 • 0 new comments

• Inherited typing for class property initializers

  #10570 commented on Mar 3, 2025 • 0 new comments

• `// @ts-mutate` decorator/directive

  #61179 commented on Mar 3, 2025 • 0 new comments

• Discriminated union parameter destructuring doesn't work if the fields have defaults

  #50139 commented on Mar 4, 2025 • 0 new comments

• New flag `--noImplicitAbstractOverride` which mandates the use of `override` when implementing an abstract method

  #47250 commented on Mar 4, 2025 • 0 new comments

• allow decorators for functions

  #7318 commented on Mar 13, 2025 • 0 new comments

• @ts-ignore for the block scope and imports

  #19573 commented on Mar 13, 2025 • 0 new comments

• Exact Types

  #12936 commented on Mar 13, 2025 • 0 new comments

• Feature request: allow user to merge extended arrays in tsconfig files

  #20110 commented on Mar 13, 2025 • 0 new comments

• Order member intellisense by inheritance

  #37362 commented on Mar 14, 2025 • 0 new comments

• Higher order type inference doesn't work with overloads

  #33594 commented on Mar 14, 2025 • 0 new comments

• Inconsistent errors reported between tsc and VSCode (Unions across objects with method overload definitions)

  #53614 commented on Mar 14, 2025 • 0 new comments

• "Debug Failure. False expression." when using default export from js file

  #60692 commented on Mar 14, 2025 • 0 new comments

• Polymorphic "this" for static members

  #5863 commented on Mar 14, 2025 • 0 new comments

• Allow "T extends enum" generic constraint

  #30611 commented on Mar 16, 2025 • 0 new comments

• Suggestion: Reopen static and instance side of classes

  #2957 commented on Mar 16, 2025 • 0 new comments

• JSDoc unexpected leading whitespace behaviour with `@example` and `<caption>`

  #43955 commented on Mar 16, 2025 • 0 new comments

• TypeScript 5.8 Iteration Plan

  #61023 commented on Mar 17, 2025 • 0 new comments

• Request: Class Decorator Mutation

  #4881 commented on Mar 17, 2025 • 0 new comments

• Disable type checking for node_modules entirely

  #40426 commented on Mar 19, 2025 • 0 new comments

• Module "..." cannot be named without a reference to "..." error when decl emitting references to nested modules

  #48212 commented on Mar 19, 2025 • 0 new comments

• Missing controlsList property in HTMLMediaElement

  #31532 commented on Mar 19, 2025 • 0 new comments

• refactor: New file generates import from wrong module specifier

  #58897 commented on Mar 19, 2025 • 0 new comments

• FEATURE REQUEST: For TypeScript / JS add new refactor feature: if class method can be static add tooltip "make method static"

  #58588 commented on Mar 10, 2025 • 0 new comments

• Different 'find all references' results on export default depending on trigger position

  #48676 commented on Mar 11, 2025 • 0 new comments

• Combining destructuring with parameter properties

  #5326 commented on Mar 11, 2025 • 0 new comments

• "Referenced projects must have the new composite setting enabled" does not hold true

  #60465 commented on Mar 11, 2025 • 0 new comments

• Option in TSConfig to include hidden/dot files

  #49555 commented on Mar 11, 2025 • 0 new comments

• Add override / noImplicitOverride support for interfaces

  #45136 commented on Mar 11, 2025 • 0 new comments

• 'identity' modifier to indicate a function's parameter-less returns should be narrowed like a value

  #60948 commented on Mar 11, 2025 • 0 new comments

• Allow mapped type to declare functions

  #48125 commented on Mar 11, 2025 • 0 new comments

• Alternative to rewriteRelativeImportExtensions & allowImportingTsExtensions

  #61050 commented on Mar 11, 2025 • 0 new comments

• Accessors should be allowed to be optional

  #54240 commented on Mar 12, 2025 • 0 new comments

• Typescript type hint problem

  #60725 commented on Mar 12, 2025 • 0 new comments

• Consider property access a form of type guards

  #1260 commented on Mar 12, 2025 • 0 new comments

• Computed import types

  #44636 commented on Mar 12, 2025 • 0 new comments

• Support for declaring index signatures using JSDoc

  #48096 commented on Mar 12, 2025 • 0 new comments

• Enable type parameter lower-bound syntax

  #14520 commented on Mar 12, 2025 • 0 new comments

• Add `--strictObjectIterables` (bikeshed): exclude primitive (`string`) from `Iterable` types

  #59676 commented on Mar 12, 2025 • 0 new comments

• “Type instantiation is excessively deep and possibly infinite” but only in a large codebase

  #34933 commented on Mar 13, 2025 • 0 new comments

• TypeScript 5.6 Iteration Plan

  #59250 commented on Mar 13, 2025 • 0 new comments