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

33 Pull requests merged by 13 people

• 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

• LEGO: Pull request from lego/hb_5378966c-b857-470a-8675-daebef4a6da1_20250227204102665 to main

  #61315 merged Feb 27, 2025

• lib.es2017: Move SharedArrayBuffer[Symbol.species] onto constructor interface

  #61271 merged Feb 26, 2025

• Fixed accidentally reused comments between files in the emitter

  #61261 merged Feb 26, 2025

• 🤖 Pick PR #61210 (Fix mistakenly disallowed default e...) into release-5.8

  #61237 merged Feb 26, 2025

• LEGO: Pull request from lego/hb_5378966c-b857-470a-8675-daebef4a6da1_20250225202237529 to main

  #61269 merged Feb 25, 2025

• Don't widen unique symbols annotated by effective type nodes in JS files

  #61180 merged Feb 24, 2025

• fix(60887): Incorrect Formatting on if (a) try {} finally {}

  #60898 merged Feb 24, 2025

• Fix to use string literal type in ArrayBuffer's Symbol.toStringTag

  #60150 merged Feb 24, 2025

• make exported destructured discriminated union narrowing work

  #59673 merged Feb 24, 2025

• Bump the github-actions group with 4 updates

  #61257 merged Feb 24, 2025

• fix(61167): Incorrect "Import may be converted to a default import" autofix for import export

  #61171 merged Feb 21, 2025

• Account for right operands & fix a weird error message for leftmost nullish literals in checkNullishCoalesceOperands

  #59569 merged Feb 21, 2025

• Find method references through base abstract classes implementing an interface

  #61234 merged Feb 21, 2025

• Provide string completions for in keyword checks

  #60272 merged Feb 20, 2025

• 🤖 Pick PR #61175 (Ban import=require and export= unde...) into release-5.8

  #61178 merged Feb 20, 2025

• Infer from annotated return type nodes before assigning contextual parameter types

  #60964 merged Feb 20, 2025

• Fix of #58996

  #59155 merged Feb 20, 2025

• Fixed JSDoc checking on enum members

  #61184 merged Feb 20, 2025

• Remove redundant getStringLiteralType call

  #59803 merged Feb 20, 2025

• Fix quick fix for isolatedDeclarations to keep trailing unknown in generics

  #61227 merged Feb 20, 2025

• Treat contextually typed functions in JS files as typed

  #56907 merged Feb 20, 2025

• Update deps, a few majors

  #60967 merged Feb 20, 2025

• Bump version to 5.9

  #61218 merged Feb 18, 2025

• Fix mistakenly disallowed default export under erasableSyntaxOnly

  #61210 merged Feb 18, 2025

• Ban import=require and export= under erasableSyntaxOnly

  #61175 merged Feb 14, 2025

• Bump esbuild from 0.24.0 to 0.25.0

  #61166 merged Feb 12, 2025

• Fixed rewriteRelativeImportExtensions for import() within call expressions

  #61154 merged Feb 10, 2025

• Bump github/codeql-action from 3.28.8 to 3.28.9 in the github-actions group

  #61156 merged Feb 10, 2025

• Pass ignoreErrors=true to more resolveEntityName callers

  #61144 merged Feb 10, 2025

33 Pull requests opened by 15 people

• Create export declaration in `Import_may_be_converted_to_a_default_import` codefix when the original node has export modifier

  #61173 opened Feb 13, 2025

• Assignable TemplateLiteral of Intersection Type of Primitive and {} to Primitive String

  #61174 opened Feb 13, 2025

• Treat functions with `@type` tags on parameters as typed in JS files

  #61177 opened Feb 14, 2025

• Contextual typing for return expressions of functions with contextual signatures based on instantiated types

  #61185 opened Feb 15, 2025

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

  #61211 opened Feb 18, 2025

• CodeFix and Diagnostic for Unnecessary Named Import

  #61219 opened Feb 18, 2025

• Fix for Issue 61081

  #61221 opened Feb 19, 2025

• Revise behavior of mapped types with `any`/`keyof any` constraints

  #61224 opened Feb 19, 2025

• Avoid circularity error caused by requesting contextual type for late bound expando members

  #61232 opened Feb 20, 2025

• Fixed accidental `undefined` omissions in union props sourced from index types under `noUncheckedIndexedAccess`

  #61233 opened Feb 20, 2025

• fix `Intl.Segments#containing` return value type

  #61236 opened Feb 20, 2025

• [WIP] feat(43950): support import types in jsdoc links

  #61248 opened Feb 22, 2025

• [WIP] Disallow merging of `enum` declarations

  #61262 opened Feb 24, 2025

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

  #61263 opened Feb 24, 2025

• Fixed an issue with `ReduceLabel` flows spoiling node reachability cache

  #61265 opened Feb 25, 2025

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

  #61290 opened Feb 26, 2025

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

  #61291 opened Feb 26, 2025

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

  #61303 opened Feb 27, 2025

• Handle `silentNeverType` in iteration-related functions

  #61317 opened Feb 28, 2025

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

  #61320 opened Feb 28, 2025

• Update deps, TS 5.8, others

  #61340 opened Mar 3, 2025

• feat(47595): allow using private fields in type queries

  #61343 opened Mar 3, 2025

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

  #61345 opened Mar 4, 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

87 Issues closed by 31 people

• 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

• Allow using types defined inside function body in the function's signature

  #61245 closed Feb 28, 2025

• Output JSON AST directly from tsc

  #61260 closed Feb 28, 2025

• tsserver plugin initialization race? typescript-plugin-css-modules and typescript-plugin-yaml don't work together

  #61231 closed Feb 28, 2025

• Sometimes, `keyof any` is `string`

  #61203 closed Feb 28, 2025

• Allow `allowImportingTsExtensions`: without either '--noEmit' or '--emitDeclarationOnly'

  #61213 closed Feb 28, 2025

• Wrong local variable type when assigned in lambda.

  #61313 closed Feb 27, 2025

• Extends in typescript get unexpect result

  #61293 closed Feb 27, 2025

• Warn when tsconfig.json extends a file that contains `references`

  #61223 closed Feb 27, 2025

• Inconsistent inferred type predicate for filter

  #61182 closed Feb 27, 2025

• Potentially misleading documentation for the `types` TSConfig option

  #61256 closed Feb 27, 2025

• About the typeof ES6 import expression

  #61241 closed Feb 27, 2025

• Tuple inference widening when function literals are included in tuple literals

  #61228 closed Feb 27, 2025

• Array.prototype.find does not narrow return type

  #61238 closed Feb 27, 2025

• Unexpected Auto-Completion Behavior in Type Inference

  #61247 closed Feb 27, 2025

• A solution to `Property of exported anonymous class type may not be private or protected.`

  #61249 closed Feb 27, 2025

• `nodenext` module resolution should turn off extension substitution

  #61251 closed Feb 27, 2025

• Reused nodes leak comment ranges for other files, leading to bad declaration emit

  #61239 closed Feb 26, 2025

• InstanceType<BigIntConstructor> fails with a compilation error and doesn't result in a bigint, as it's supposed to

  #61272 closed Feb 26, 2025

• TypeScript incorrectly detects nullable when using Required operator

  #61275 closed Feb 26, 2025

• TSC generates type definition files it considers itself as containing an error.

  #60207 closed Feb 25, 2025

• Suporte opcional a blocos baseados em identação

  #61240 closed Feb 24, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250223 vs 5.7.3

  #61254 closed Feb 24, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250223 vs 5.7.3

  #61253 closed Feb 24, 2025

• [NewErrors] 5.9.0-dev.20250223 vs 5.7.3

  #61252 closed Feb 24, 2025

• [ServerErrors][TypeScript] 5.8.0-dev.20250216 vs 5.7.3

  #61199 closed Feb 24, 2025

• [ServerErrors][JavaScript] 5.8.0-dev.20250216 vs 5.7.3

  #61198 closed Feb 24, 2025

• [NewErrors] 5.8.0-dev.20250216 vs 5.7.3

  #61195 closed Feb 24, 2025

• [ServerErrors][JavaScript] 5.4.0-dev.20240107

  #56975 closed Feb 24, 2025

• `typeof` unique symbol is treated as `symbol` in JSDoc

  #61170 closed Feb 24, 2025

• Incorrect Formatting on `if (a) try {} finally {}`

  #60887 closed Feb 24, 2025

• Use string literal type in `ArrayBuffer`'s `Symbol.toStringTag`

  #60149 closed Feb 24, 2025

• Variables (extracted from a discriminated union object) lose narrowed types after being exported

  #59652 closed Feb 24, 2025

• question: typing a function's argument based on the object it is called in

  #61220 closed Feb 24, 2025

• Failure to clean files after build

  #61250 closed Feb 23, 2025

• String.prototype.replace* can have better types for the replacer capturing group instead of any.

  #61243 closed Feb 22, 2025

• Incorrect "Import may be converted to a default import" autofix for `import export`

  #61167 closed Feb 21, 2025

• v4.7 and above stopped supporting a type pattern that used to work in v4.6 (Key Remapping in Mapped Type)

  #51141 closed Feb 21, 2025

• "This binary expression is never nullish" errors due to the way I format my code

  #59546 closed Feb 21, 2025

• Go-to-references on optional method does not work if class has parent class

  #61215 closed Feb 21, 2025

• `in` keyword completions

  #52736 closed Feb 20, 2025

• Filter with "something is smallerType" don't work as negative

  #58996 closed Feb 20, 2025

• Warning 6133 ignores @link tags on enum members

  #61183 closed Feb 20, 2025

• [isolatedDecalaration] Quick fix for isolatedDeclarations drops trailing `unknown` in generics instantiation

  #61208 closed Feb 20, 2025

• Using `@satisfies` tag in JSDoc has strange effects on arrow function parameters

  #56900 closed Feb 20, 2025

• Error TS2729 should occur inside arrow function

  #61212 closed Feb 19, 2025

• Instances of generic interfaces are incompatible because their generic arguments are incompatible; even when two instances in question are structurally identical

  #61100 closed Feb 18, 2025

• type alternatives in arguments become function alternatives and are then inferred to a never argument.

  #61186 closed Feb 17, 2025

• Declaration merging can break equality tests for named tuples

  #61162 closed Feb 15, 2025

• Array.flatMap incorrectly narrows types.

  #61168 closed Feb 15, 2025

• Add option to require interface implementations to strictly conform to the declarations.

  #61164 closed Feb 14, 2025

• TypeScript LSP Cannot Resolve `lib.dom.d.ts` Despite File Existing

  #61157 closed Feb 14, 2025

• Distributive type on generic has surprising results

  #61169 closed Feb 12, 2025

• [ServerErrors][TypeScript] 5.8.0-dev.20250209 vs 5.7.3

  #61155 closed Feb 12, 2025

• [ServerErrors][JavaScript] 5.8.0-dev.20250209 vs 5.7.3

  #61153 closed Feb 12, 2025

• [NewErrors] 5.8.0-dev.20250209 vs 5.7.3

  #61152 closed Feb 12, 2025

• Provide a specialized error on top-level await and --module node12

  #46149 closed Feb 12, 2025

• Rename symbol to not proceed if a naming conflict would occur

  #61163 closed Feb 11, 2025

• TS Intellisense Performance: Unusable on versions 1.94+

  #61135 closed Feb 10, 2025

• rewriteRelativeImportExtensions does not rewrite extension if import expression has .then attached

  #61151 closed Feb 10, 2025

• Typescript 5.5 does not infer event handler types in MUI

  #59474 closed Feb 10, 2025

• Unwanted Template string product when same union is used multiple times.

  #61160 closed Feb 10, 2025

• Memory leakage occurs in the getTypeAtLocation method in the latest version.

  #61008 closed Feb 10, 2025

• Double (exclusion) inference doesn't narrow union object

  #61075 closed Feb 10, 2025

• Incorrect type in Unreachable code

  #61146 closed Feb 10, 2025

• type assertion should support additional return type

  #61142 closed Feb 8, 2025

• "Error: Debug Failure" at `getTypeOfVariableOrParameterOrPropertyWorker` effecting `@types/node` due to self-referential namespace

  #61149 closed Feb 8, 2025

• Private field (#) initialized before the constructor body

  #61148 closed Feb 8, 2025

• Type predicate silently ignored when used as non-statement expression

  #61105 closed Feb 8, 2025

• Help debuggers by not emitting loop bodies in new functions/classes?

  #61111 closed Feb 8, 2025

• Shouldn't `in` operator narrow away optional properties? or design limitation?

  #61124 closed Feb 8, 2025

• Narrowing interacts badly with mutation of properties of shared object

  #61125 closed Feb 8, 2025

64 Issues opened by 60 people

• `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

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

  #61370 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

• Unable to do module augmentation

  #61367 opened Mar 6, 2025

• References from dynamic imports not recognized when indirectly exporting variable

  #61366 opened Mar 6, 2025

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

  #61364 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

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

  #61361 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

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

  #61338 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

• Class satisfies type

  #61324 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

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

  #61316 opened Feb 28, 2025

• checker.getSuggestionDiagnostics fails with `TypeError: Cannot read properties of undefined (reading 'parent')`

  #61314 opened Feb 27, 2025

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

  #61302 opened Feb 27, 2025

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

  #61292 opened Feb 26, 2025

• Slow compilation with nested optional chaining

  #61273 opened Feb 26, 2025

• Error "Class name cannot be 'Object' when targeting ES5 with module CommonJS." when not targeting es5

  #61270 opened Feb 25, 2025

• Add a flag to error when an uninitialized function is called

  #61267 opened Feb 25, 2025

• `Element.getElementsByTagName` marked as deprecated

  #61264 opened Feb 25, 2025

• Exhaustive switch case with returns can mark a finally block as unreachable

  #61259 opened Feb 24, 2025

• Renaming namespace with const enum doesn't update enum references

  #61258 opened Feb 24, 2025

• Mixins created from `obj.constructor` cannot have members

  #61255 opened Feb 23, 2025

• Conditional type flow types missing in the template in mapped types with as clause

  #61246 opened Feb 22, 2025

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

  #61242 opened Feb 21, 2025

• Intl.Segments.prototype.containing should include undefined in return value

  #61235 opened Feb 20, 2025

• Path alias with trailing slash not resolving

  #61230 opened Feb 20, 2025

• Include results from `--extendedDiagnostics` when using the compiler API

  #61229 opened Feb 20, 2025

• Bloomberg feedback for 5.8

  #61226 opened Feb 19, 2025

• Unions seem to sidestep `--noUncheckedIndexedAccess` and lose the possibility of undefined

  #61225 opened Feb 19, 2025

• Support source phase imports

  #61216 opened Feb 18, 2025

• Support type inference for Symbol keys on function

  #61214 opened Feb 18, 2025

• `IDBObjectStore` `keyPath` missing `null` type.

  #61209 opened Feb 18, 2025

• Discriminated Union is not narrowed to never when all types are checked in default case if discriminator field is literal type

  #61207 opened Feb 17, 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 opened Feb 17, 2025

• Autocompletion of Template Literal Types with unresolved types.

  #61217 opened Feb 17, 2025

• Failed type check in monorepo project.

  #61200 opened Feb 17, 2025

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

  #61197 opened Feb 16, 2025

• Inconsistent enum literal types

  #61196 opened Feb 16, 2025

• Allow `accessor` properties in `.d.ts` even when targeting ES5

  #61181 opened Feb 15, 2025

• `// @ts-mutate` decorator/directive

  #61179 opened Feb 14, 2025

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

  #61176 opened Feb 14, 2025

• `Parameters` does not work in JS files unless a `@param` has been explicitly defined

  #61172 opened Feb 13, 2025

• Object.defineProperty(variable) does not error in `.js` files if `variable` does not exist

  #61165 opened Feb 12, 2025

• Enables `implements` on abstract classes with protected members (usefull for generic mixins)

  #61161 opened Feb 10, 2025

• When using a string value as export for reference, the .d.ts file created with dot notation instead of computed property which can break

  #61159 opened Feb 10, 2025

• Narrowed `const` variables are widened in block-scoped closures

  #61158 opened Feb 10, 2025

• Decorator helper `__esDecorate` refers to `Object`, which can be clobbered

  #61150 opened Feb 8, 2025

158 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 #55632 issue (No type inferrence of callback arguments inside a tuple union type)

  #60434 commented on Feb 15, 2025 • 8 new comments

• Walk all outer expression kinds before comitting to the return type of a symbol call

  #61071 commented on Feb 27, 2025 • 6 new comments

• Fixed a printer crash caused by empty parameter modifiers

  #60537 commented on Feb 24, 2025 • 5 new comments

• Always discriminate contextual types by existing discriminant property

  #61097 commented on Feb 22, 2025 • 2 new comments

• support quick info and go to definition on mapped keys

  #61061 commented on Feb 24, 2025 • 1 new comment

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

  #60646 commented on Mar 2, 2025 • 1 new comment

• 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

• 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

• `as enum` assertion for object literals

  #60790 commented on Mar 7, 2025 • 0 new comments

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

  #26792 commented on Mar 7, 2025 • 0 new comments

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

  #48676 commented on Mar 7, 2025 • 0 new comments

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

  #11920 commented on Mar 7, 2025 • 0 new comments

• Support @class in JSDoc

  #12681 commented on Mar 7, 2025 • 0 new comments

• Error inferring types of promise function

  #17873 commented on Mar 7, 2025 • 0 new comments

• this any typed in some JS object literals

  #22058 commented on Mar 7, 2025 • 0 new comments

• Suggestion: Type annotations and interfaces for function declarations

  #22063 commented on Mar 7, 2025 • 0 new comments

• Allow extending types referenced through interfaces

  #31843 commented on Mar 7, 2025 • 0 new comments

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

  #33471 commented on Mar 7, 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 7, 2025 • 0 new comments

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

  #39114 commented on Mar 7, 2025 • 0 new comments

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

  #39650 commented on Mar 7, 2025 • 0 new comments

• Compile error if I named last array destructuring element.

  #41548 commented on Mar 7, 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 7, 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

• 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

• TypeScripts Type System is Turing Complete

  #14833 commented on Mar 2, 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

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

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

• TypeScript 5.8 Iteration Plan

  #61023 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

• `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

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

  #60166 commented on Mar 7, 2025 • 0 new comments

• Fix 4628: add compiler option for non-check static member in inheritance

  #39699 commented on Feb 8, 2025 • 0 new comments

• feat(3792): Cannot 'export default' abstract, ambient class or interface

  #46120 commented on Feb 23, 2025 • 0 new comments

• Use iterators to avoid calculating all properties of UnionOrIntersectionType

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

• fix(55899): Indexing/element access on super avoids instance property checks

  #55903 commented on Feb 22, 2025 • 0 new comments

• Include source node inferences in string literal completions deeper in arguments

  #56182 commented on Feb 23, 2025 • 0 new comments

• Infer from annotated parameters of context sensitive functions in the first inference pass

  #56460 commented on Feb 22, 2025 • 0 new comments

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

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

• Support const assertions and unit type const variable references in constant expressions

  #59475 commented on Feb 19, 2025 • 0 new comments

• Experiment: Always report `useDefineForClassFields`-related errors even when disabled

  #59623 commented on Feb 25, 2025 • 0 new comments

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

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

• [WIP] Support condition always true in prefix unary expression

  #60068 commented on Feb 11, 2025 • 0 new comments

• fix(55308) convertTypedefToType does not get's the type outside of th…

  #60301 commented on Feb 22, 2025 • 0 new comments

• Disallow confusing combinations of !in and !instanceof

  #60628 commented on Feb 22, 2025 • 0 new comments

• Add support for `import defer` proposal

  #60757 commented on Feb 23, 2025 • 0 new comments

• Filter #private static members from js declaration emit

  #60977 commented on Feb 19, 2025 • 0 new comments

• Fix types for Object.entries/Object.fromEntries

  #61074 commented on Feb 22, 2025 • 0 new comments

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

  #61145 commented on Mar 6, 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 7, 2025 • 0 new comments

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

  #42905 commented on Mar 7, 2025 • 0 new comments

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

  #43943 commented on Mar 7, 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 7, 2025 • 0 new comments

• Intersection causes incorrect type compatability

  #48720 commented on Mar 7, 2025 • 0 new comments

• Regression in 4.8 where string union type widens to string

  #50635 commented on Mar 7, 2025 • 0 new comments

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

  #52313 commented on Mar 7, 2025 • 0 new comments

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

  #53234 commented on Mar 7, 2025 • 0 new comments

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

  #57009 commented on Mar 7, 2025 • 0 new comments

• mapped type with remapped keys unexpectedly widens type

  #57265 commented on Mar 7, 2025 • 0 new comments

• Inconsistent type inference on overloaded function types

  #57351 commented on Mar 7, 2025 • 0 new comments

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

  #57564 commented on Mar 7, 2025 • 0 new comments

• Inconsistent typechecking with require() in JS and TS

  #60032 commented on Mar 7, 2025 • 0 new comments

• Allow specifying exclude as a command line option

  #46005 commented on Mar 7, 2025 • 0 new comments

• Auto-import priority rules

  #51155 commented on Mar 7, 2025 • 0 new comments

• Talk about Exceptions Here

  #56365 commented on Mar 7, 2025 • 0 new comments

• List @deprecated strikethroughs in Problems tab

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

• Exact Types

  #12936 commented on Mar 7, 2025 • 0 new comments

• Static method on abstract class with generic this parameter causes "excessively deep" error when called on concrete class

  #60992 commented on Feb 13, 2025 • 0 new comments

• Allow interface merging for DecoratorMetadataObject and parameterization by This

  #60997 commented on Feb 13, 2025 • 0 new comments

• unique symbol + interface + mixin causes TS4058 ("but cannot be named")

  #57165 commented on Feb 14, 2025 • 0 new comments

• Bug: Circular references not allowed for template literal types

  #44792 commented on Feb 14, 2025 • 0 new comments

• Cannot export both types and values from CJS

  #60852 commented on Feb 15, 2025 • 0 new comments

• Allow `... | undefined` in comparisons (`<`, `>`, etc)

  #61141 commented on Feb 15, 2025 • 0 new comments

• Branded string literals revert to `string` in some cases

  #60990 commented on Feb 15, 2025 • 0 new comments

• Type safety with `TemplateStringsArray` and tag functions

  #33304 commented on Feb 16, 2025 • 0 new comments

• import ConstJson from './config.json' as const;

  #32063 commented on Feb 16, 2025 • 0 new comments

• Separate type application from function application

  #29043 commented on Feb 17, 2025 • 0 new comments

• Enable type parameter lower-bound syntax

  #14520 commented on Feb 18, 2025 • 0 new comments

• tsconfig.json "lib": "dom" should include "dom.iterable"(?)

  #60959 commented on Feb 18, 2025 • 0 new comments

• Incorrect narrowing of Union type after discrimination when one type is assignable to the other (even when explicit type annotation is present)

  #56106 commented on Feb 19, 2025 • 0 new comments

• Organize Import removes React import on React JS files

  #60775 commented on Feb 19, 2025 • 0 new comments

• Accept de-structured elements in type predicates

  #41173 commented on Feb 19, 2025 • 0 new comments

• Type predicate for an optional property is not inferred

  #59494 commented on Feb 19, 2025 • 0 new comments

• [proposal] Non widened string values should be valid enum values, like widened string values

  #59346 commented on Feb 19, 2025 • 0 new comments

• Type is not referred correctly in the while loop

  #59715 commented on Feb 20, 2025 • 0 new comments

• Object.defineProperty doesn't define properties on 'this'

  #28694 commented on Feb 20, 2025 • 0 new comments

• New Feature Requesting for `const` Parameter

  #18497 commented on Feb 24, 2025 • 0 new comments

• Add the strictMathChecks option to allow for less complex code with math operations

  #45543 commented on Feb 8, 2025 • 0 new comments

• Incorrect class #private fields initialization order with target ES2022 and useDefineForClassFields set to false

  #54206 commented on Feb 8, 2025 • 0 new comments

• Error: Debug Failure when importing `AssertionError` from `node:assert/strict`

  #58534 commented on Feb 8, 2025 • 0 new comments

• Infer constrained generic parameters after instanceof check

  #17473 commented on Feb 9, 2025 • 0 new comments

• Properties of instances of anonymous classes have type <any> after an instanceof guard.

  #17253 commented on Feb 9, 2025 • 0 new comments

• Control flow analysis should "work" in unreachable code

  #26914 commented on Feb 10, 2025 • 0 new comments

• `keyof FilteringMappedType` can't compute its constraint

  #56239 commented on Feb 11, 2025 • 0 new comments

• Cannot assign readonly statics in static blocks

  #56584 commented on Feb 11, 2025 • 0 new comments

• NuGet packages not available for pre-release versions of 5.7

  #60489 commented on Feb 11, 2025 • 0 new comments

• Object spreading produces wrong type with non-literal keys

  #56431 commented on Feb 12, 2025 • 0 new comments

• Option in TSConfig to include hidden/dot files

  #49555 commented on Feb 12, 2025 • 0 new comments

• rewriteRelativeImportExtensions: tsc doesn't rewrite extensions in emitted declaration files

  #61037 commented on Feb 12, 2025 • 0 new comments

• Wrong function parameters when refactoring code containing a destructuring assignment with new variable names

  #61006 commented on Feb 12, 2025 • 0 new comments

• Enum keys not accepted as computed properties if their name is not a valid identifier

  #25083 commented on Feb 12, 2025 • 0 new comments

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

  #60692 commented on Feb 12, 2025 • 0 new comments

• No information for Error: Debug Failure. No error for last overload signature

  #35186 commented on Feb 13, 2025 • 0 new comments

• Feature Request: Instantiate Generic Functions within Conditional Types

  #61133 commented on Feb 13, 2025 • 0 new comments

• Affine types / ownership system

  #16148 commented on Feb 13, 2025 • 0 new comments

• Type Inference Fails with Generic Types

  #60447 commented on Feb 13, 2025 • 0 new comments

• JSDoc recursive inference not working properly on generic array wrapping

  #60988 commented on Feb 13, 2025 • 0 new comments

• `@ts-nocheck` and `@ts-ignore` should also disable suggestions

  #47315 commented on Feb 25, 2025 • 0 new comments

• Go to definition through sub-packages

  #61001 commented on Feb 25, 2025 • 0 new comments

• Type annotations for default export

  #13626 commented on Feb 25, 2025 • 0 new comments

• Pick<T, Exclude<keyof T, K>> & Pick<T, Extract<keyof T, K>> should be assignable to T

  #28884 commented on Feb 25, 2025 • 0 new comments

• SUGGESTION: add support for writeonly properties on interfaces

  #21759 commented on Feb 25, 2025 • 0 new comments

• Typescript Watch - Cleaning Target Files on Source Deletion

  #16057 commented on Feb 26, 2025 • 0 new comments

• Force Override Declarations Types

  #36146 commented on Feb 26, 2025 • 0 new comments

• Proposal for merging array or object options in tsconfig file

  #57486 commented on Feb 26, 2025 • 0 new comments

• Types `number` and explicitly constrained `T extends unknown` shouldn't be comparable

  #32814 commented on Feb 26, 2025 • 0 new comments

• Resolve deferred conditional types to their `true` branch when instantiated with a type parameter constrained to the tested type

  #52144 commented on Feb 26, 2025 • 0 new comments

• Inline *_base declaration in d.ts files

  #59550 commented on Feb 26, 2025 • 0 new comments

• VSCode auto-import ignores typescript.preferences.importModuleSpecifierEnding when using a path from the package.json imports

  #60423 commented on Feb 26, 2025 • 0 new comments

• Reverse mapped types don't use their constraint types when no candidates are present unlike the regular type parameters

  #56241 commented on Feb 27, 2025 • 0 new comments

• "The inferred type of X cannot be named without a reference to Y" (TS2742) still happens, when working with npm link to link packages manually

  #58914 commented on Feb 27, 2025 • 0 new comments

• Allow leading underscore for types to bypass noUnusedLocals warning

  #58561 commented on Feb 27, 2025 • 0 new comments

• Feature: Analyze @throws tags

  #31329 commented on Feb 27, 2025 • 0 new comments

• Trade-offs in Control Flow Analysis

  #9998 commented on Feb 27, 2025 • 0 new comments

• HTMLImageElement#crossOrigin should use literal union type from allowable values

  #39829 commented on Feb 27, 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

• Find All References does not work with module.exports in JavaScript

  #44832 commented on Feb 20, 2025 • 0 new comments

• Ambient Module Declarations for Import Attributes (formerly known as Import Assertions)

  #46135 commented on Feb 21, 2025 • 0 new comments

• Type detection for dynamic imports with template strings

  #51726 commented on Feb 21, 2025 • 0 new comments

• Set as executable files that are intended to be binaries

  #37583 commented on Feb 21, 2025 • 0 new comments

• `references` are not inherited in `tsconfig.json`

  #27098 commented on Feb 21, 2025 • 0 new comments

• Rename refactor fails when renaming an object key to a string with a space in it

  #42844 commented on Feb 21, 2025 • 0 new comments

• TypeScript does not detect a symlinked directory getting re-created

  #55313 commented on Feb 21, 2025 • 0 new comments

• Smart indentation on separated elements should reuse the prior element's starting base indentation

  #53548 commented on Feb 22, 2025 • 0 new comments

• Member-wise checks give incorrect errors for type assertions

  #55167 commented on Feb 22, 2025 • 0 new comments

• Misleading error message for `super.instanceProperty`

  #55883 commented on Feb 22, 2025 • 0 new comments

• Codefix `convertTypedefToType` creates types in a wrong place

  #55308 commented on Feb 22, 2025 • 0 new comments

• [ServerErrors][JavaScript] 5.2.0-dev.20230730

  #55209 commented on Feb 22, 2025 • 0 new comments

• New inlay hint implementation after v5.3 can appear too long

  #56541 commented on Feb 22, 2025 • 0 new comments

• jsDoc intellisense support for @augments/@extends

  #30943 commented on Feb 22, 2025 • 0 new comments

• TypeScript complains about overwriting .d.ts files that are potentially known outputs

  #16749 commented on Feb 22, 2025 • 0 new comments

• async/await: nowait keyword?

  #13376 commented on Feb 22, 2025 • 0 new comments

• Decorators not allowed classes expressions

  #7342 commented on Feb 23, 2025 • 0 new comments

• Add TS server command for removing all unused code in a file

  #40922 commented on Feb 24, 2025 • 0 new comments

• Add Temporal (Stage 3) types

  #60164 commented on Feb 24, 2025 • 0 new comments

• Ideas for faster cold compiler start-up

  #25658 commented on Feb 24, 2025 • 0 new comments