microsoft / TypeScript

19 Pull requests merged by 11 people

• 🤖 Pick PR #44394 (Handle strict flag when writing tsb...) into release-4.3

  #44431 merged Jun 4, 2021

• Update the version in baseline with fake one

  #44447 merged Jun 4, 2021

• [release-4.3] Fix duplicate visit of param tag comments (#44443)

  #44444 merged Jun 4, 2021

• Fix duplicate visit of param tag comments

  #44443 merged Jun 4, 2021

• Do not incorrectly add line separators for non-synthetic nodes when emitting node list

  #44070 merged Jun 4, 2021

• fix: check if sysFormatDiagnosticsHost is defined

  #44344 merged Jun 4, 2021

• 🤖 Pick PR #44290 (fix(44273): preserves 'override' mo...) into release-4.3

  #44425 merged Jun 3, 2021

• Update LKG.

  #44423 merged Jun 3, 2021

• Handle strict flag when writing tsbuildinfo

  #44394 merged Jun 3, 2021

• fix(44273): preserves 'override' modifier in JavaScript output

  #44290 merged Jun 3, 2021

• Add flag to change `catch` variables' default types to `unknown`

  #41013 merged Jun 3, 2021

• Improve non-ambient class and function merge error

  #44352 merged Jun 3, 2021

• Rename TSConfig option categories

  #42514 merged Jun 3, 2021

• Tsserver tests can be baselined

  #44326 merged Jun 2, 2021

• Fixes subset of bugs (three tests fixed) listed in issue #41974

  #44367 merged Jun 2, 2021

• [release-4.3] Fix unintended 'as const' name lookup error (#44311)

  #44370 merged Jun 1, 2021

• Strict optional properties

  #43947 merged Jun 1, 2021

• Switch references to master to main in the codebase + validating infra post-main migration

  #44347 merged Jun 1, 2021

• Add a testcase that fails when someone tries to make an Object.keys PR

  #44368 merged Jun 1, 2021

12 Pull requests opened by 10 people

• fix: "Convert named imports to namespace import" adds redundant underscore suffix

  #44338 opened May 30, 2021

• Fix running bin script for es modules with node resolution

  #44345 opened May 31, 2021

• Add union of replacer function and string to lib d.ts

  #44348 opened May 31, 2021

• go-to-type-definition, and find-all-refs should work for import.meta

  #44364 opened Jun 1, 2021

• fix(44377): Compiler error : TypeError: Cannot read property 'kind' of undefined

  #44378 opened Jun 2, 2021

• Fix 'arguments' check in class field initializer or static initialization block

  #44393 opened Jun 2, 2021

• Improve "Convert to template string" with template-strings

  #44399 opened Jun 2, 2021

• Make export-module and reference maps invertible

  #44402 opened Jun 2, 2021

• Update descriptions for all compiler options

  #44409 opened Jun 3, 2021

• Re-name really long test file

  #44413 opened Jun 3, 2021

• Rename SyntaxKind.JSDocComment -> JSDoc

  #44416 opened Jun 3, 2021

• fix 44422

  #44430 opened Jun 4, 2021

279 Issues closed by 26 people

• Key Remapping not working in Typescript playground for TS version 4.1.5 and 4.2

  #44355 closed Jun 5, 2021

• Type narrowing as documented is broken

  #44450 closed Jun 5, 2021

• TypeScript 4.3 substantially slower compilation than 4.2

  #44283 closed Jun 4, 2021

• missing error for enum when used in an array property

  #44371 closed Jun 4, 2021

• ts.Node.getChildren() returns duplicate copies of the same AST nodes in TS 4.3

  #44422 closed Jun 4, 2021

• unintended never type after a null check

  #44380 closed Jun 4, 2021

• Indexed access type isn't taking information from conditional into account

  #44387 closed Jun 4, 2021

• `strictOptionalProperties` should not affect comparability

  #44420 closed Jun 4, 2021

• Default branch is now named `main`

  #44323 closed Jun 4, 2021

• Spread of optional properties can result in unexpected runtime errors

  #44432 closed Jun 4, 2021

• Printer incorrectly adding line break when emitting node list with non-synthesized nodes as of TS 4.3

  #44068 closed Jun 4, 2021

• Early binding to sys can cause undefined FormatDiagnosticHost

  #44343 closed Jun 4, 2021

• Incremental builds with .tsbuildinfo-files are not faster than non incremental builds

  #44305 closed Jun 3, 2021

• TypeScript preserves 'override' modifier on properties in JavaScript esnext output

  #44273 closed Jun 3, 2021

• Unable to assign a boolean argument to a parameter that accepts both true and false

  #44392 closed Jun 3, 2021

• Flag to type 'catch' variables as 'unknown'.

  #41016 closed Jun 3, 2021

• Convey discriminating union field information throughout function calls

  #44385 closed Jun 3, 2021

• Inconsistent assignment of function type with optional fields

  #44406 closed Jun 3, 2021

• Improve error on non-ambient class and function merge

  #32795 closed Jun 3, 2021

• extends `keyof` does not allow extended new keys on interfaces since 4.3.0

  #44295 closed Jun 3, 2021

• Cannot pass optional property _a_ to the other type's optional property _b_ if `--strictOptionalProperties=true`

  #44390 closed Jun 3, 2021

• Declaring as object or undefined has problems in ts4.3

  #44407 closed Jun 3, 2021

• What does using a `const` assertion after a `const` string declaration do?

  #44391 closed Jun 2, 2021

• keyof for tuple

  #44395 closed Jun 2, 2021

• What is the correct way to type a "Dictionary" (Record/Object does not work)

  #44361 closed Jun 2, 2021

• Object.keys unable to infer type of key

  #44376 closed Jun 2, 2021

• Array methods on union of tuples with empty tuple

  #44383 closed Jun 2, 2021

• Inference does not extend to generics of types, causing widened covariant types, and errors for contravariant types

  #44328 closed Jun 2, 2021

• Tagged type narrowing doesn't work when one of the tags is a union type

  #43026 closed Jun 1, 2021

• Can not infer deterministic type, when use intersection in generic

  #43074 closed Jun 1, 2021

• Explicit application gives different results with a function that returns a template literal type

  #42897 closed Jun 1, 2021

• ReturnType break the original funtion return type if function is method of a class

  #42706 closed Jun 1, 2021

• Spread does not infer type for [key: string] object

  #42665 closed Jun 1, 2021

• Generics derived from inheritance do not work properly!

  #42896 closed Jun 1, 2021

• Type 'Hello[S][string]' is not assignable to type '(...args: any) => any'

  #42576 closed Jun 1, 2021

• Null-Check is not fully recognized for `Partial<T>` generic mapped types

  #42537 closed Jun 1, 2021

• Incorrect TS7022 error in loop

  #42529 closed Jun 1, 2021

• Optional type not checked if used in only one branch of nested promises

  #42417 closed Jun 1, 2021

• ReturnType can not infer promise return type right

  #42493 closed Jun 1, 2021

• TSC failing to deduce this inside a method definition when calling an inherited method with a distributive parameter type

  #42413 closed Jun 1, 2021

• Wrong error : Object is possibly 'undefined'. (TS2532)

  #41542 closed Jun 1, 2021

• typeguard else statement is not working properly

  #42185 closed Jun 1, 2021

• Using recursive type aliases gives circular reference error

  #42308 closed Jun 1, 2021

• Type arguments used in return types of argument functions are not correctly inferred when wrapped in objects

  #42379 closed Jun 1, 2021

• Limit of 25 members when using union of mapped type

  #40803 closed Jun 1, 2021

• Can't get the type of the nth argument of an overloaded method / polymorphic method

  #40816 closed Jun 1, 2021

• Mapped type used with `keyof` not narrowing

  #36050 closed Jun 1, 2021

• Invalid "could be instantiated with a different subtype of constraint" error

  #35858 closed Jun 1, 2021

• Typeguard method not working for class members

  #36887 closed Jun 1, 2021

• JSON Module Type Resolution With Heterogeneous Arrays

  #37831 closed Jun 1, 2021

• Generic type infer in overloaded function

  #32418 closed Jun 1, 2021

• ReturnType support for assertions

  #34636 closed Jun 1, 2021

• Type inference issue when using generic function and generic constraint

  #24747 closed Jun 1, 2021

• Wrong branch of non-distributing conditional type inference near recursion limit for complex nested type

  #42223 closed Jun 1, 2021

• Error 2322 - Cannot init constant of generic type union of 2 optional index signatures

  #42200 closed Jun 1, 2021

• Function.prototype.bind typings do not work properly when supplied a function with variadic arguments.

  #42196 closed Jun 1, 2021

• tsc 2344 emitted when using Parameters, despite resolving the argument type.

  #42018 closed Jun 1, 2021

• type checker does not recognize MyType reassembled from MyType["foo"] when MyType is a union

  #42085 closed Jun 1, 2021

• Unable to assign functions with fewer parameters to functions that take more parameters in a generic form

  #41720 closed Jun 1, 2021

• Type Error

  #41990 closed Jun 1, 2021

• Compiler not automatically inferring not null of Object

  #41926 closed Jun 1, 2021

• Intellisense type detection doesn't handle recursive generator/async functions well

  #41988 closed Jun 1, 2021

• Boolean literal type preserved in reduce when used in filter

  #41702 closed Jun 1, 2021

• The type was lost in default function parameters

  #41668 closed Jun 1, 2021

• Object is possibly undefined` error in TypeScript 4.1.2

  #41612 closed Jun 1, 2021

• Return type not inferred from generic callback

  #40849 closed Jun 1, 2021

• Infer interdependencies in object literals

  #41396 closed Jun 1, 2021

• String literal in typeof import in typescript 4.1.0-beta.

  #41550 closed Jun 1, 2021

• `Reflect.deleteProperty` allows deletion of properties that aren't optional

  #41039 closed Jun 1, 2021

• Poor inference for variadic tuple rest element when other inference targets are not rest parameters

  #39244 closed Jun 1, 2021

• invariant and failing types infer

  #38990 closed Jun 1, 2021

• some comments are missing when using the compiler API

  #40074 closed Jun 1, 2021

• every does not respect typeguard

  #36892 closed Jun 1, 2021

• Destructuring array into an object is assignable to an array type

  #34780 closed Jun 1, 2021

• Omit properties from generic type which set by default and have extend

  #33484 closed Jun 1, 2021

• Can't exclude undefined from indexed Partial with simple guard

  #31908 closed Jun 1, 2021

• Higher order function inference breaks with multiple overloads

  #30369 closed Jun 1, 2021

• Using undefined as a property discriminated union doesn't work correctly with control flow narrowing

  #31404 closed Jun 1, 2021

• Failure to refine generic argument of type `extends boolean`

  #41333 closed Jun 1, 2021

• false negative on uninitialized reference (null pointer exception) in class method

  #41446 closed Jun 1, 2021

• Recursive conditional type infer unknown[] instead of string[]

  #41414 closed Jun 1, 2021

• Type string is assignable to interface with index signature from number to string

  #41228 closed Jun 1, 2021

• Cache specific utility types

  #41263 closed Jun 1, 2021

• CalableFunction interface can be assigned to variable with another 'call' method signature

  #41135 closed Jun 1, 2021

• Weird behavior of generic method parameter type

  #40903 closed Jun 1, 2021

• Method overloads are often frustrating for me

  #40827 closed Jun 1, 2021

• Array.prototype.some() doesn't cause type narrowing

  #40844 closed Jun 1, 2021

• Can't index object in generic function with property name extracted with Pick from derived type

  #40832 closed Jun 1, 2021

• Type guards in parenthesis throws syntax error

  #40655 closed Jun 1, 2021

• TS allows undefined properties on class instance to be called or assigned to variables that don't have undefined in their type

  #40644 closed Jun 1, 2021

• "readonly" interface property is not working when modifying instance property using Object.defineProperty

  #40719 closed Jun 1, 2021

• Assignment contextual typing doesn't work consistently for overloaded function interfaces versus function union types

  #40323 closed Jun 1, 2021

• Mapped discriminating union refinement

  #40559 closed Jun 1, 2021

• after x[ii] && ..., it should be clear that x[ii] is not falsy

  #39445 closed Jun 1, 2021

• Lose const array type after flating

  #40250 closed Jun 1, 2021

• Discriminated unions do not work with `never` / optional discriminant

  #38144 closed Jun 1, 2021

• "is assignable to the constraint of type but could be instantiated with a different subtype of constraint" error with assetion function

  #39036 closed Jun 1, 2021

• .d.ts files strip private property types, which can be used to distinguish instance types

  #38953 closed Jun 1, 2021

• Typescript incorrectly resolves discriminated unions of indexed types

  #37052 closed Jun 1, 2021

• Design:type metadata for cyclic dependencies throw at runtime

  #27519 closed Jun 1, 2021

• Assigning to a unwrapped type doesn't work on Generics but works with Interface

  #33942 closed Jun 1, 2021

• Interfaces and types that use conditional types and inheritance no longer assignable

  #32608 closed Jun 1, 2021

• Object is possibly 'null' due to slight difference in code with strictNullChecks

  #27431 closed Jun 1, 2021

• Unsafe assignment of Record into interface with optionals

  #40529 closed Jun 1, 2021

• Type error for unique symbol as optional property key of class

  #40465 closed Jun 1, 2021

• Project-references type check with --noEmit fails without built files

  #40431 closed Jun 1, 2021

• Methods that always throw aren't always recognized as a return from a function

  #39839 closed Jun 1, 2021

• False positive in "variable is never read" when using object.defineProperty

  #40440 closed Jun 1, 2021

• Infer generic function types from arg by way of mapped type

  #39838 closed Jun 1, 2021

• Functions union type or interface won't infer the correct argument types

  #39692 closed Jun 1, 2021

• Generic inference from return type

  #39688 closed Jun 1, 2021

• Incorrect type inference inside stateful loop

  #39183 closed Jun 1, 2021

• Generic keyof deduction does not use Interface

  #39612 closed Jun 1, 2021

• Type check doesn't work in generic class, but works in its derived class

  #39222 closed Jun 1, 2021

• Incorrect type inference with bracket accessor and return object type

  #39659 closed Jun 1, 2021

• Type parameter inference of function chained parameters and return values does not work.

  #38872 closed Jun 1, 2021

• The expression is not callable

  #39179 closed Jun 1, 2021

• Object.assign does not conclude correct type from second argumet in ternary operator

  #39002 closed Jun 1, 2021

• Promise.resolve() need type assertion for string literals

  #38861 closed Jun 1, 2021

• Functions with overloads don't automatically get types for their parameters

  #38625 closed Jun 1, 2021

• Possible to implement overloaded call signature with an arrow function?

  #38622 closed Jun 1, 2021

• Mapped type with function makes generic accessed function not callable

  #38843 closed Jun 1, 2021

• symbol type not match

  #38617 closed Jun 1, 2021

• Typescript ignores prototype of object literals assigned to index signatures

  #37963 closed Jun 1, 2021

• Type isn't narrowed if used after conditionally calling class method with never as return type

  #36753 closed Jun 1, 2021

• Function return type with array

  #33158 closed Jun 1, 2021

• Inference to generic overloaded construct signatures fails

  #35641 closed Jun 1, 2021

• Cannot use matching indexes across objects with similar types

  #31445 closed Jun 1, 2021

• Hover hint is invalid if there are multiple type aliases with same parameters

  #38829 closed Jun 1, 2021

• Type guard on conditional parameter type

  #38863 closed Jun 1, 2021

• Error property-will-be-overwritten-by-spread for non-enumerable properties

  #38589 closed Jun 1, 2021

• Possibly empty tuple confuses map and reduce methods

  #38514 closed Jun 1, 2021

• Type guards ignored in closure

  #38755 closed Jun 1, 2021

• Optional arguments due to multiple constructors are not considered when resolving rest parameters in generics

  #38211 closed Jun 1, 2021

• Parameter inference breaks type intersection

  #38183 closed Jun 1, 2021

• Exclude<string, "foo"> is not working

  #38254 closed Jun 1, 2021

• Type narrowing/guard together with nullish coalescing/optional chaining

  #38136 closed Jun 1, 2021

• `value: T` is not assignable to `Exclude<T, null>` after passing `value !== null` check

  #38140 closed Jun 1, 2021

• Generic rest parameters can't be combined with additional arguments

  #38134 closed Jun 1, 2021

• Destructuring assertions gives unexpected results

  #37818 closed Jun 1, 2021

• Flow-sensitive type narrowing does not extend into closures that are created after the narrowing is applied

  #37802 closed Jun 1, 2021

• Possibly undefined in filter

  #38053 closed Jun 1, 2021

• When using generic parameters, the actual type is not assignable to an InstanceType on a constructor in an interface

  #37705 closed Jun 1, 2021

• (Set | Array).forEach loses type inference for callback

  #37453 closed Jun 1, 2021

• Fails to infer the value at a given key for concrete types

  #37675 closed Jun 1, 2021

• Overloaded union type does not resolve overloads

  #37704 closed Jun 1, 2021

• Union type narrowing doesn't work on `object | OtherType`

  #37405 closed Jun 1, 2021

• Ternary operator with precondition does not compile: Object is possibly 'undefined'.

  #37452 closed Jun 1, 2021

• Discriminated union(?) not working when fields have same name?

  #37343 closed Jun 1, 2021

• Using "arguments" keyword with Function.prototype.apply causes TS2345

  #36470 closed Jun 1, 2021

• function with properties type interface is not type safe

  #37207 closed Jun 1, 2021

• No autocomplete when using something other than any on keyof extends generic

  #35682 closed Jun 1, 2021

• TS fails to understand guard for Array.prototype.pop()

  #30406 closed Jun 1, 2021

• Generic Type: return type from callback as T incorrect

  #37051 closed Jun 1, 2021

• Inferred generic type gets lost when trying to return value

  #36737 closed Jun 1, 2021

• Generic mapping returns union type

  #36349 closed Jun 1, 2021

• Type of class member functions does not contain this type

  #36803 closed Jun 1, 2021

• JavaScript intellisense does not support adding additional prototype properties to function call in other file

  #36609 closed Jun 1, 2021

• Type checking not work in circular reference

  #36070 closed Jun 1, 2021

• Indexed access operator issue with Omit type

  #36316 closed Jun 1, 2021

• No compiler warning/error that class B has no member function `formatString(number)`

  #36229 closed Jun 1, 2021

• Type inference fails for function accepting function with object argument

  #36020 closed Jun 1, 2021

• Recursive type declaration is expanded and contains errors

  #35980 closed Jun 1, 2021

• Strange "Object is possibly 'null'" assumption

  #35964 closed Jun 1, 2021

• Typeguard for union not working after adding a property to the superclass of one of the union members

  #35953 closed Jun 1, 2021

• Can't compare arrray length inside nested ifs

  #35795 closed Jun 1, 2021

• Type inference fails on instance method call that returns same type

  #35758 closed Jun 1, 2021

• [Typescript] References to methods/properties of class are not recognized inside a function which is bound to the class using .bind(this).

  #35673 closed Jun 1, 2021

• Conditional types incorrect for complex types

  #35533 closed Jun 1, 2021

• Type error when using generic function result as argument, but not when assigned to temp variable first

  #35339 closed Jun 1, 2021

• Type check does not work if it is done in a method call

  #35446 closed Jun 1, 2021

• Inference of “this” with higher order functions

  #35222 closed Jun 1, 2021

• Assignment to type alias containing `T[keyof T]` property does not respects variance

  #32311 closed Jun 1, 2021

• Cannot widen type in generics while retaining knowledge of assignability

  #35257 closed Jun 1, 2021

• Unstable type inference when generic is inferred from a return type

  #29771 closed Jun 1, 2021

• Type wrongly assumed to be undefined | number in this case

  #31603 closed Jun 1, 2021

• Improve Promise constructor return type

  #32254 closed Jun 1, 2021

• Narrowing to remove undefined from optional object properties

  #28882 closed Jun 1, 2021

• Type inference doesn't work in recursive reference situation.

  #34910 closed Jun 1, 2021

• Typescript is unable to correctly derive bind parameters for a discord.js function in strict mode

  #34613 closed Jun 1, 2021

• tuple inference in array vs rest

  #34865 closed Jun 1, 2021

• Assigning to common property (with different types) of a union type is incorrectly allowed

  #33911 closed Jun 1, 2021

• Issues working with Generic Constraints

  #34567 closed Jun 1, 2021

• Loose type info of union type after second 'if' condition

  #33546 closed Jun 1, 2021

• Logically equivalent functions return different Types when return is a `Promise | non Promise`

  #33499 closed Jun 1, 2021

• Wrong type on extend parent class object field

  #33899 closed Jun 1, 2021

• Type guard not working on object property

  #33391 closed Jun 1, 2021

• Wrong type inference on a mutated array

  #33443 closed Jun 1, 2021

• Mapped Type with generics display wrong type in IDE

  #32932 closed Jun 1, 2021

• Generic class's type param `T` errors if class contains a `keyof T` method

  #32907 closed Jun 1, 2021

• Inference from arrow function parameters with default initializers is broken when passed to generic function

  #33072 closed Jun 1, 2021

• Inconsistent enum type merging

  #32621 closed Jun 1, 2021

• Misplaced or partially removed comments in emitted code

  #32813 closed Jun 1, 2021

• Polymorphic this type does not work with conditional mapped types

  #32550 closed Jun 1, 2021

• User-defined type guard behaves differently inside `Array.filter`

  #30240 closed Jun 1, 2021

• Generic return type inferred only with explicitly typed (not inferred) parameter

  #31892 closed Jun 1, 2021

• TypeScript unable to infer correct type of thisArg in Array.prototype.forEach()

  #32512 closed Jun 1, 2021

• TypeScript compiler stucks with --incremental flag

  #31258 closed Jun 1, 2021

• Emiting instance member property in `.d.ts` instead of a function in Mixin contexts (when no override)

  #28799 closed Jun 1, 2021

• Infer generic type from ReturnType

  #28655 closed Jun 1, 2021

• Type inference breaks without currying but compiles with currying

  #12621 closed Jun 1, 2021

• Type narrowing not working as expected

  #11245 closed Jun 1, 2021

• type inference lost literal type

  #27704 closed Jun 1, 2021

• Type inference not strict enough

  #32715 closed Jun 1, 2021

• Second infer overwrites initally infered type defintion

  #32389 closed Jun 1, 2021

• Fails for simple type inference

  #32586 closed Jun 1, 2021

• When using a prototype function with `this` being `Array<keyof T>`, TS incorrectly says that an array with contents known at compile-time is not of that type. Same thing works with a regular function.

  #32535 closed Jun 1, 2021

• Cannot assign array containing string-type to union of Iterable and string.

  #32714 closed Jun 1, 2021

• Types not checked when computed property key has multiple possible values

  #32309 closed Jun 1, 2021

• Compose function can not deduce generic types of arguments if compose function is defined right to left

  #31738 closed Jun 1, 2021

• Can't assign result of function of type T to ReturnType<T>

  #31811 closed Jun 1, 2021

• Function argument Type-assertion does not work correctly

  #31716 closed Jun 1, 2021

• Exclude<keyof this , ... > not working

  #31669 closed Jun 1, 2021

• Missing import suggestions (in *.tsx) for some components from node_modules (npm)

  #30906 closed Jun 1, 2021

• Generics - Difference between instantiation (and change afterwards) and direct instantiation of Partial<T>

  #30989 closed Jun 1, 2021

• Argument of type 'T[T[K] extends T[] ? K : never]' is not assignable to parameter of type 'T[]'.

  #30728 closed Jun 1, 2021

• React, JSX and refs

  #30748 closed Jun 1, 2021

• Indexing a mapped type does not return the expected type.

  #30784 closed Jun 1, 2021

• output declaration type random change order

  #30328 closed Jun 1, 2021

• Array reduce callback (reducer) and default parameters

  #30686 closed Jun 1, 2021

• type dosen't infered correctly in loop when `strictNullChecks` turns on

  #30308 closed Jun 1, 2021

• Strict Null: unexpected complaint about type being possibly undefined when checked before

  #30224 closed Jun 1, 2021

• bug(generics): errors of inferring types for an array

  #30207 closed Jun 1, 2021

• Type inference not producing error

  #30175 closed Jun 1, 2021

• Function return type is not implied conditionally based on type of parameter

  #30262 closed Jun 1, 2021

• Inconsistency in types after type inference

  #24369 closed Jun 1, 2021

• Object literals with depth of ~10 (with arrays) stop reporting type inference

  #21771 closed Jun 1, 2021

• Function argument inference only handles one overload

  #26591 closed Jun 1, 2021

• Loss of type inference converting to named parameters object

  #29791 closed Jun 1, 2021

• Poor type inference for unique symbol

  #30196 closed Jun 1, 2021

• Type 'true' constants behave differently than 'true' literal

  #29323 closed Jun 1, 2021

• Cannot reference type of a different property in the same object literal

  #29586 closed Jun 1, 2021

• When is guards for incompatible types are assigned to each other, an error occurs (breaks Array filter)

  #29501 closed Jun 1, 2021

• Value matching union type rejected

  #28139 closed Jun 1, 2021

• Not null refinement does not work for type being null

  #28665 closed Jun 1, 2021

• Error,use decorator on ReactComponent ,ComponentClass can't assignable to type 'void | typeof Main'

  #29169 closed Jun 1, 2021

• Control Flow narrows X | undefined to never without checking arrow function

  #28038 closed Jun 1, 2021

• Global variable of non-null type, never assigned, no error if used in function

  #28013 closed Jun 1, 2021

• Using the switched variable in an if statement causes an error.

  #28016 closed Jun 1, 2021

• Extending wrapper objects (e.g. Number, String, etc.)

  #27602 closed Jun 1, 2021

• Incorrect type inference

  #27212 closed Jun 1, 2021

• unknown[] as rest params with generic parameter breaks generic inference

  #27439 closed Jun 1, 2021

• Mixin function incorrectly replacing generic type on an abstract function

  #27420 closed Jun 1, 2021

• Type Narrowing with logical OR doesn't work properly

  #27002 closed Jun 1, 2021

• keyof generic intersection

  #27094 closed Jun 1, 2021

• Type parameter is not inferred from method return type

  #26926 closed Jun 1, 2021

• Inferred index types on type parameters don't propagate through NonNullable<T>

  #26942 closed Jun 1, 2021

• 3.0.1 - Empty object in nested array breaks typing

  #26868 closed Jun 1, 2021

• Compiler is unable to resolve return type of function even though it is returning function with known return type

  #26623 closed Jun 1, 2021

• Unable to infer types correctly from generic on function

  #26418 closed Jun 1, 2021

• Intersection type of object types does not satisfy generic constraint.

  #26548 closed Jun 1, 2021

• Recursive types limit?

  #26001 closed Jun 1, 2021

• Inheritance nested class from interface contains rxjs reference, breaks constructor type checking

  #26056 closed Jun 1, 2021

• Distinguish missing and undefined

  #13195 closed Jun 1, 2021

• `noUncheckedIndexedAccess` error in 4.3 that wasn't in 4.2: accessing an object based on `keyof` itself.

  #44332 closed Jun 1, 2021

• Variable overwrite issue after upgrade to 4.3.2

  #44339 closed Jun 1, 2021

• add a gitignore command

  #44356 closed Jun 1, 2021

• Subclass can't explain this type

  #44349 closed Jun 1, 2021

• `readonly` fields should be `writable: false`

  #44357 closed Jun 1, 2021

• Returned inline functions property access privileges differ between methods and functions with contextual this

  #44365 closed Jun 1, 2021

• TypeScript as a language is fragmented into two languages

  #44360 closed Jun 1, 2021

• (dup #44281) false positive ts2310: Type '' recursively references itself as a base type. (regression 4.2.4 -> 4.3.2)

  #44359 closed Jun 1, 2021

• Computed generic argument type is not narrowed

  #44358 closed Jun 1, 2021

• transformer can't get import type details

  #44160 closed Jun 1, 2021

• React TSX File can not use JS file if JS is having some Props then in TSX getting error

  #44161 closed Jun 1, 2021

• Object spreed inference got broken with inlined conditional from 4.2

  #44247 closed May 31, 2021

• False positive for TS2729 (use before initialization) with target = ESNext

  #44298 closed May 31, 2021

• Return type can be inferenced, but can not narrow in function branch

  #44246 closed May 31, 2021

• Wrong type after await

  #44314 closed May 31, 2021

• [NewErrors] 4.4.0-dev.20210530 vs 4.3.2

  #44341 closed May 30, 2021

• Cannot assign an instance of the Intersection of a Record and a Partial of a Record

  #44196 closed May 30, 2021

• Promise<unknown> is not assignable to Promise<void>

  #44201 closed May 30, 2021

• Intellisense path suggestions hides file extension referencing .js/x and .ts/x files

  #44214 closed May 30, 2021

• No error thrown when function moved to new file

  #44331 closed May 30, 2021

• NewableFunction not working as intended

  #44337 closed May 30, 2021

• `declarationMap` causing incremental builds to crash on version 4+

  #44335 closed May 30, 2021

• Mixin base requires explicit type in TS 4.3 due to "recursively referencing itself" when it doesn't

  #44284 closed May 29, 2021

• Incorrect type check when passing record as "interface with optional field" argument

  #44135 closed May 29, 2021

• Class property expecting `null` becomes `any` on init when `strictNullChecks` isn't enabled

  #44300 closed May 29, 2021

61 Issues opened by 53 people

• https://github.com/DefinitelyTyped/DefinitelyTyped/pull/53633

  #44451 opened Jun 5, 2021

• Property decorator not working anymore

  #44449 opened Jun 4, 2021

• Non-optional but undefined `delete` under strictOptionalProperties

  #44448 opened Jun 4, 2021

• Type guards don’t always narrow generic types

  #44446 opened Jun 4, 2021

• Design Meeting Notes, 6/4/2021

  #44442 opened Jun 4, 2021

• Incorrect function parameters accepted for interface with overloads

  #44441 opened Jun 4, 2021

• Union of functions with same signature not seen as equivalent to a function with the same signature and union of return values

  #44440 opened Jun 4, 2021

• Override keyword should not be required on optional base type members, without implementations.

  #44439 opened Jun 4, 2021

• Object spread does not respect optional undefined union when strictOptionalProperties is on

  #44438 opened Jun 4, 2021

• TS should not allow assigning value with undefined union to non-nullable property when strictOptionalProperties

  #44437 opened Jun 4, 2021

• [Feature Request] Show resolved number literals on hover

  #44436 opened Jun 4, 2021

• Type narrowing does not work for unions which contain template literals.

  #44435 opened Jun 4, 2021

• [regression 4.2.4-4.3.2] TS 4.3 builds .d.ts using import statements referencing absolute project paths instead of relative paths

  #44434 opened Jun 4, 2021

• Function generic types will not be evaluated by conditional types

  #44433 opened Jun 4, 2021

• TS Server fatal error: Cannot read property 'length' of undefined

  #44445 opened Jun 4, 2021

• ESNext subclasses in 4.3 breaks assignments in super constructor

  #44429 opened Jun 4, 2021

• Probable bug: Intellisense doesn't work in case of circular type parameter constraints like `T extends M<T>`

  #44428 opened Jun 4, 2021

• [NewErrors] 4.4.0-dev.20210602 vs 4.3.2

  #44427 opened Jun 4, 2021

• Add performance coverage for builder/incremental/watch scenarios

  #44426 opened Jun 4, 2021

• `lib.d.ts` Updates for TypeScript 4.4

  #44424 opened Jun 3, 2021

• Discussion on `--strictOptionalProperties`

  #44421 opened Jun 3, 2021

• Provide upgrade tooling for `--strictOptionalProperties`

  #44419 opened Jun 3, 2021

• For almost every .tsx file in my project TS7026: JSX element implicitly has type 'any' because no interface 'JSX.IntrinsicElements' exists.

  #44418 opened Jun 3, 2021

• New error: Type 'Window & typeof globalThis' is not assignable to type 'Window'

  #44417 opened Jun 3, 2021

• Type inference worked in 4.2.3 but fails in 4.3.2

  #44412 opened Jun 3, 2021

• Renaming file doesn't update imports in other projects which reference this project

  #44411 opened Jun 3, 2021

• Compiler should catch the arguments type mismatch in generic functions

  #44410 opened Jun 3, 2021

• Trying to flatten an array with unknown depth causes a type error

  #44408 opened Jun 3, 2021

• Object.fromEntries: return type does not account for symbols

  #44405 opened Jun 3, 2021

• Union types are not being narrowed correctly in generic functions in 4.3

  #44404 opened Jun 3, 2021

• Issue a better error for strictOptionalProperties

  #44403 opened Jun 3, 2021

• Union types are not being narrowed down correctly in 4.3

  #44401 opened Jun 2, 2021

• Design Meeting Notes, 6/2/2021

  #44400 opened Jun 2, 2021

• Types for MediaRecorder

  #44398 opened Jun 2, 2021

• Bad template string refactor w/ existing template strings

  #44396 opened Jun 2, 2021

• Constrained generic types infer `never` on a function, even when the argument meets the constraints

  #44389 opened Jun 2, 2021

• Cannot narrow the optional properties to `T` properly through `(T | undefined) => T` if --strictOptionalProperties=true

  #44388 opened Jun 2, 2021

• JSDoc @type function with variable args is interpreted incorrectly

  #44386 opened Jun 2, 2021

• type inference breaks with composition function using extend on generic arguments

  #44384 opened Jun 2, 2021

• Type guard of union with conditional type not working since 4.3

  #44382 opened Jun 2, 2021

• Consecutive function declaration problems in JS files

  #44381 opened Jun 2, 2021

• Expose a function for constructing a new System based on a custom FS implementation

  #44379 opened Jun 2, 2021

• Compiler error : TypeError: Cannot read property 'kind' of undefined

  #44377 opened Jun 2, 2021

• Subclass can't explain this type inside itself

  #44375 opened Jun 2, 2021

• importModuleSpecifierEnding = js doesn't apply for autocomplete within import paths

  #44374 opened Jun 1, 2021

• .every() .find() .filter() methods fail with "This expression is not callable." error on union of array types

  #44373 opened Jun 1, 2021

• typeguards only narrow types when used with unary not

  #44366 opened Jun 1, 2021

• Typing `0n` results in attempting to autocomplete.

  #44363 opened Jun 1, 2021

• TypeScript should not use dependencies from an unrelated node_modules directory in a sibling directory

  #44362 opened Jun 1, 2021

• TS Server fatal error: Cannot read property 'forEach' of undefined

  #44372 opened May 31, 2021

• Error in 'collectAutoImports' during 'completionEntryDetails'

  #44354 opened May 31, 2021

• branded type generics regression - 4.3.2

  #44353 opened May 31, 2021

• Element implicitly has an 'any' type because expression of type 'string' can't be used to index type

  #44351 opened May 31, 2021

• [Compiler API] Reuse default compiler host when customizing module resolution

  #44350 opened May 31, 2021

• TS Server fatal error: Cannot read property 'length' of undefined

  #44414 opened May 31, 2021

• TS Server fatal error: Cannot read property 'length' of undefined

  #44415 opened May 31, 2021

• Use explicit extensions in TypeScript's package.json for Node ES resolution compatibility

  #44342 opened May 30, 2021

• Provide autocomplete features for plugin configuration options in tsconfig.json

  #44340 opened May 30, 2021

• SVGGeometryElement is missing methods: isPointInStroke, isPointInFill

  #44336 opened May 29, 2021

• Breaking change 4.3 RC: TS2488: Build:Type 'SomeArrayType' must have a '[Symbol.iterator]()' method that returns an iterator.

  #44334 opened May 29, 2021

• Symbol in object not treated as a narrowing type guard

  #44333 opened May 29, 2021

350 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.

• Always issue cannot find name did-you-mean error

  #44271 commented on Jun 3, 2021 • 17 new comments

• [Experiment] feat(7342): Decorators not allowed classes expressions

  #42198 commented on Jun 4, 2021 • 10 new comments

• Regex-validated string types (feedback reset)

  #41160 commented on Jun 5, 2021 • 9 new comments

• JavaScript heap out of memory after upgrading to 4.3

  #44299 commented on Jun 3, 2021 • 8 new comments

• tsserver should implement the Language Server Protocol

  #39459 commented on Jun 5, 2021 • 7 new comments

• refactor help command line output.

  #44157 commented on Jun 5, 2021 • 7 new comments

• Include actual generated module specifiers in module specifier cache

  #44176 commented on Jun 4, 2021 • 7 new comments

• Always allow code before super call when it does not use "this"

  #8277 commented on May 31, 2021 • 6 new comments

• Fix parser regression for bad related diagnostic on missing matching brackets

  #44158 commented on Jun 2, 2021 • 6 new comments

• Add support for F#-style Pipeline Operator

  #38305 commented on Jun 2, 2021 • 5 new comments

• Add inlay hints support

  #42089 commented on Jun 4, 2021 • 5 new comments

• Proposal: Do expression and async do expression

  #42437 commented on Jun 5, 2021 • 5 new comments

• Getting recursive type errors with TS 4.3.2 when they don't happen with TS 4.2.4

  #44281 commented on Jun 1, 2021 • 4 new comments

• Support for all type features in declaration files.

  #35822 commented on Jun 2, 2021 • 4 new comments

• TypeScript 4.4 Iteration Plan

  #44237 commented on Jun 3, 2021 • 4 new comments

• TypeScripts Type System is Turing Complete

  #14833 commented on Jun 1, 2021 • 3 new comments

• The current type in the union types of Promise.allSettled aren't narrowed down properly

  #42012 commented on Jun 3, 2021 • 3 new comments

• Suggestion: treat `in` operator as type guard which asserts property existence

  #21732 commented on Jun 3, 2021 • 3 new comments

• Suggestion: Type annotations and interfaces for function declarations

  #22063 commented on Jun 3, 2021 • 3 new comments

• fix: add es2016.intl.d.ts

  #39662 commented on Jun 1, 2021 • 3 new comments

• allow `this` in typeQuery

  #43898 commented on Jun 4, 2021 • 3 new comments

• Make handleDtsMayChangeOf void-returning

  #44322 commented on Jun 1, 2021 • 3 new comments

• Figure out how to deal with annoying `node:` prefix in auto-imports from @types/node

  #43842 commented on May 30, 2021 • 2 new comments

• Add Inline value provider api for debugging

  #43449 commented on May 31, 2021 • 2 new comments

• 💡 Yield Overrides

  #43632 commented on May 31, 2021 • 2 new comments

• Decorators not allowed classes expressions

  #7342 commented on Jun 1, 2021 • 2 new comments

• Support `@callback` nested parameter types for JSDoc

  #36101 commented on Jun 1, 2021 • 2 new comments

• Generic function does not accept argument of type with union and intersection

  #44315 commented on Jun 2, 2021 • 2 new comments

• rootDirs should merge outputs

  #44321 commented on Jun 3, 2021 • 2 new comments

• When using numbers keyof lost the keys of objects

  #44231 commented on Jun 4, 2021 • 2 new comments

• Proposal: The internal modifier for classes

  #5228 commented on Jun 4, 2021 • 2 new comments

• Proposal: covariance and contravariance generic type arguments annotations

  #10717 commented on Jun 4, 2021 • 2 new comments

• Allow any key type as an index signature parameter type

  #26797 commented on Jun 4, 2021 • 2 new comments

• 4.0: Cannot use variadic tuples in Promise.all

  #39788 commented on May 29, 2021 • 1 new comment

• Consider allowing packages to define multiple canonical names for their modules

  #42764 commented on May 30, 2021 • 1 new comment

• feature: ability to extract union of valid index numbers for tuple

  #32917 commented on May 30, 2021 • 1 new comment

• JSX import fixes do not support new React JSX Transform (without react import)

  #41762 commented on May 31, 2021 • 1 new comment

• Error: Debug Failure. False expression: Expected line to be non-zero in 'failIfInvalidLocation' during 'navtree'

  #36977 commented on May 31, 2021 • 1 new comment

• Error: Debug Failure. False expression. in 'doChange' during 'getCodeFixes'

  #32856 commented on May 31, 2021 • 1 new comment

• Error: No Project. in 'Object.ThrowNoProject' during 'getApplicableRefactors'

  #33186 commented on May 31, 2021 • 1 new comment

• Error: Debug Failure. Did not expect JsxClosingFragment to have an Identifier in its trivia in 'addSyntheticNodes' during 'documentHighlights'

  #32857 commented on May 31, 2021 • 1 new comment

• Error in 'getImportFixForSymbol' during 'completionEntryDetails'

  #39766 commented on May 31, 2021 • 1 new comment

• Error: Debug Failure. Invalid cast. The supplied value [object Object] did not pass the test 'isParameter'. in 'Object.cast' during 'getCodeFixes'

  #32852 commented on May 31, 2021 • 1 new comment

• Error: Debug Failure. Did not expect JsxClosingFragment to have an Identifier in its trivia in 'addSyntheticNodes' during 'jsxClosingTag'

  #32850 commented on May 31, 2021 • 1 new comment

• Error in 'getImportFixForSymbol' during 'getCodeFixes'

  #39877 commented on May 31, 2021 • 1 new comment

• Error: Debug Failure. Did not expect JsxClosingFragment to have an Identifier in its trivia in 'addSyntheticNodes' during 'signatureHelp'

  #32861 commented on May 31, 2021 • 1 new comment

• Error in 'getSymbolExportInfoForSymbol' during 'completionEntryDetails'

  #43018 commented on May 31, 2021 • 1 new comment

• TypeError: Cannot read property 'tagName' of undefined in 'isUnclosedTag' during 'jsxClosingTag'

  #36451 commented on May 31, 2021 • 1 new comment

• Error in 'getImportFixForSymbol' during 'getCodeFixes'

  #43019 commented on May 31, 2021 • 1 new comment

• Indirect type narrowing via `const`

  #12184 commented on Jun 1, 2021 • 1 new comment

• Type named capture groups better

  #32098 commented on Jun 1, 2021 • 1 new comment

• Force Override Declarations Types

  #36146 commented on Jun 1, 2021 • 1 new comment

• Type checking/VS Code slow when using MUI

  #34801 commented on Jun 1, 2021 • 1 new comment

• URL interface is not part of the Window object

  #44245 commented on Jun 1, 2021 • 1 new comment

• Assume arity of tuples when declared as literal

  #24350 commented on Jun 1, 2021 • 1 new comment

• Suggestion: Const contexts for generic type inference

  #30680 commented on Jun 1, 2021 • 1 new comment

• Intentionally widen generics

  #44312 commented on Jun 1, 2021 • 1 new comment

• Array.reduce doesn't work

  #44063 commented on Jun 1, 2021 • 1 new comment

• Easier destructuring with type annotations on binding patterns

  #29526 commented on Jun 2, 2021 • 1 new comment

• @ts-ignore for the block scope and imports

  #19573 commented on Jun 2, 2021 • 1 new comment

• Automatically inserting JSX closing element in TypeScript JSX file

  #5997 commented on Jun 2, 2021 • 1 new comment

• Review the project setup experience

  #41580 commented on Jun 2, 2021 • 1 new comment

• Function using Generics with destructuring args and defaults, casts the wrong types

  #40438 commented on Jun 2, 2021 • 1 new comment

• tsc not respecting types/typeRoots config for imported modules

  #43094 commented on Jun 2, 2021 • 1 new comment

• Allow "T extends enum" generic constraint

  #30611 commented on Jun 2, 2021 • 1 new comment

• null checked variables in getter's closure

  #18243 commented on Jun 2, 2021 • 1 new comment

• Include Default Parameter Values in Signature Help

  #16665 commented on Jun 2, 2021 • 1 new comment

• Octal escape sequences should be a lexical/syntactic error in strict mode and ES5

  #396 commented on Jun 3, 2021 • 1 new comment

• Allow classes to be parametric in other parametric classes

  #1213 commented on Jun 3, 2021 • 1 new comment

• Optional chaining, proper infer in type guard

  #34974 commented on Jun 3, 2021 • 1 new comment

• "Convert parameters to destructured object": enable for functions with just one parameter

  #41753 commented on Jun 3, 2021 • 1 new comment

• Distinguish between plain object types and class types

  #29063 commented on Jun 3, 2021 • 1 new comment

• Wishlist: support for correlated union types

  #30581 commented on Jun 3, 2021 • 1 new comment

• Enable type parameter lower-bound syntax

  #14520 commented on Jun 3, 2021 • 1 new comment

• disable certain global types for specific files, or specify type roots for specific files.

  #37053 commented on Jun 3, 2021 • 1 new comment

• Suggestion: check narrowed type in user-defined type guards

  #29980 commented on Jun 3, 2021 • 1 new comment

• New error: This spread always overwrites this property

  #37559 commented on Jun 3, 2021 • 1 new comment

• Variant accessors for index signatures and mapped types

  #43826 commented on Jun 3, 2021 • 1 new comment

• USVString type definition

  #28775 commented on Jun 3, 2021 • 1 new comment

• The results of the 'Mapped Types' distribution have changed.

  #44325 commented on Jun 3, 2021 • 1 new comment

• Covariant quantifiers are specialized to widest possible type in conditional types, should be narrowest

  #42491 commented on Jun 4, 2021 • 1 new comment

• Feature Request: F# style Type Provider support?

  #3136 commented on Jun 4, 2021 • 1 new comment

• Asserts on `this` from a member function does not narrow `this`

  #44212 commented on Jun 4, 2021 • 1 new comment

• Remote declaration file

  #28985 commented on Jun 4, 2021 • 1 new comment

• Proposal: Interval Types

  #43505 commented on Jun 4, 2021 • 1 new comment

• Optional discriminated union's callback parameter type is not inferred

  #35769 commented on Jun 4, 2021 • 1 new comment

• "sufficiently overlaps" on class instance depends on class statics

  #43754 commented on Jun 4, 2021 • 1 new comment

• Organize imports: add an option to put all absolute paths after node_modules ones

  #30456 commented on Jun 4, 2021 • 1 new comment

• `\u` in String.raw

  #42887 commented on Jun 5, 2021 • 1 new comment

• Allowed non-this, non-super code before super call in derived classes with property initializers

  #29374 commented on Jun 1, 2021 • 1 new comment

• expose getOptionalType and getNonOptionalType

  #33876 commented on Jun 1, 2021 • 1 new comment

• Sort emitted declarations of union types.

  #34868 commented on May 31, 2021 • 1 new comment

• Add support for Partial Application

  #37973 commented on Jun 3, 2021 • 1 new comment

• Support 'typeof class' types

  #41587 commented on May 31, 2021 • 1 new comment

• Allows detection of an overloaded function call by CallHierarchy.getOutgoingCalls

  #42444 commented on May 31, 2021 • 1 new comment

• Replace non-null assertion with optional chain on assert nodes

  #43788 commented on Jun 4, 2021 • 1 new comment

• Include type reference directives in symlink cache, wait until program is present to create it

  #44259 commented on Jun 3, 2021 • 1 new comment

• Allows plugin to register commands

  #44291 commented on Jun 1, 2021 • 1 new comment

• Generate escaped string in `createTemplateHead*`

  #44313 commented on Jun 3, 2021 • 1 new comment

• Adds a script for removing unused diagnostics

  #44324 commented on Jun 3, 2021 • 1 new comment

• Conditionally optional/conditionally readonly properties

  #44261 commented on May 29, 2021 • 0 new comments

• Strings do not have known keys associated with their indexes

  #41037 commented on May 31, 2021 • 0 new comments

• Locally scoped & typed jsxFactory

  #44018 commented on Jun 1, 2021 • 0 new comments

• [Bug] Spread syntax breaks kebab-case attributes IntelliSense

  #44302 commented on Jun 1, 2021 • 0 new comments

• `default class` without `export` is successfully parsed after a decorator

  #44319 commented on Jun 1, 2021 • 0 new comments

• [NewErrors] 4.4.0-dev.20210523 vs 4.2.4

  #44226 commented on Jun 1, 2021 • 0 new comments

• Ignore Specific Error [AGAIN]

  #38409 commented on Jun 1, 2021 • 0 new comments

• Initial build mode build emits twice

  #43995 commented on Jun 1, 2021 • 0 new comments

• Transformer: hoistVariableDeclaration does not work correctly with class fields

  #44327 commented on Jun 1, 2021 • 0 new comments

• "Cannot read property 'lastIndexOf' of undefined" error in tsserver.js

  #43105 commented on Jun 3, 2021 • 0 new comments

• Support inlay hints

  #42073 commented on Jun 4, 2021 • 0 new comments

• JSDoc support for object literal fields

  #290 commented on Jun 5, 2021 • 0 new comments

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

  #33471 commented on Jun 5, 2021 • 0 new comments

• Should preserve unique symbols when re‑assigning `module.exports`

  #37403 commented on Jun 5, 2021 • 0 new comments

• Should create unique symbols when creating properties on `module.exports`

  #37404 commented on Jun 5, 2021 • 0 new comments

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

  #39114 commented on Jun 5, 2021 • 0 new comments

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

  #39650 commented on Jun 5, 2021 • 0 new comments

• Class Property Inference from Constructors fails for a simple object declared in place

  #39681 commented on Jun 5, 2021 • 0 new comments

• Hoisted function declarations should be assigned to `exports` before any `require` calls

  #39853 commented on Jun 5, 2021 • 0 new comments

• 'this' autocomplete broken

  #39946 commented on Jun 5, 2021 • 0 new comments

• Unexpected behavior (possible bug)

  #39970 commented on Jun 5, 2021 • 0 new comments

• error when a variable is both read as a parameter and written as a result of a function call in an async do while loop

  #40096 commented on Jun 5, 2021 • 0 new comments

• Array#map() is not callable on type-guarded array

  #40463 commented on Jun 5, 2021 • 0 new comments

• Support “Arbitrary module namespace identifier names”

  #40594 commented on Jun 5, 2021 • 0 new comments

• Using an optional call with `.flat()` produces incorrect types

  #41007 commented on Jun 5, 2021 • 0 new comments

• Compile error if I named last array destructuring element.

  #41548 commented on Jun 5, 2021 • 0 new comments

• instanceof Promise in ternary does not narrow Promiselike in 4.1

  #41606 commented on Jun 5, 2021 • 0 new comments

• TS4.1.2 Regression: Incorrect arity inferred on function returned by util.callbackify if input function has optional or default argument

  #41607 commented on Jun 5, 2021 • 0 new comments

• TS 4.1 regression in type assertion of generic mapped type

  #41617 commented on Jun 5, 2021 • 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 Jun 5, 2021 • 0 new comments

• The type of bitwise operations on 'any' operands should be 'number | bigint'

  #42125 commented on Jun 5, 2021 • 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 Jun 5, 2021 • 0 new comments

• Add flag to not transpile dynamic `import()` when module is `CommonJS`

  #43329 commented on Jun 5, 2021 • 0 new comments

• Use lib conditional types for type facts if possible

  #22348 commented on May 31, 2021 • 0 new comments

• Remove whitespace

  #25492 commented on May 31, 2021 • 0 new comments

• Implement partial type argument inference using the _ sigil

  #26349 commented on May 31, 2021 • 0 new comments

• Add assignability rules for when the target is a conditional type

  #27932 commented on May 31, 2021 • 0 new comments

• Improve error message when comparing non-comparable types

  #28023 commented on May 31, 2021 • 0 new comments

• Exact types - [WIP]

  #28749 commented on May 31, 2021 • 0 new comments

• Negated types

  #29317 commented on May 31, 2021 • 0 new comments

• Add module: hybrid

  #29353 commented on May 31, 2021 • 0 new comments

• Instantiate `this` in non-super property/element access expressions

  #29468 commented on May 31, 2021 • 0 new comments

• WIP: Polymorphic "this" for static members

  #29484 commented on May 31, 2021 • 0 new comments

• NOT READY TO MERGE - Use conditional type inference for promise resolution

  #29671 commented on May 31, 2021 • 0 new comments

• Lookup return type of factory function for JSX expression return types

  #29818 commented on May 31, 2021 • 0 new comments

• narrow by instanceof: infer type parameters from original type

  #30161 commented on May 31, 2021 • 0 new comments

• Uniform Generics for Conditional Type Inference and Type Parameter Narrowing [Experiment]

  #30284 commented on May 31, 2021 • 0 new comments

• Expand isEmptyIntersectionType to check for objects with mutually exclusive property types

  #30476 commented on May 31, 2021 • 0 new comments

• Merge overloads that only differ by return type when intersecting

  #30520 commented on May 31, 2021 • 0 new comments

• feat: Implement the `implicitUnknown` complier flag

  #30813 commented on May 31, 2021 • 0 new comments

• Inline type aliases

  #30979 commented on May 31, 2021 • 0 new comments

• During inference break down unions on the target side before unions on the source side

  #31345 commented on May 31, 2021 • 0 new comments

• Interactive Diagnostics

  #31384 commented on May 31, 2021 • 0 new comments

• Fix conditional type type parameter leak

  #31455 commented on May 31, 2021 • 0 new comments

• Allow inference to explore multiple instances of the same symbol

  #31633 commented on May 31, 2021 • 0 new comments

• Nominal `unique type` brands

  #33038 commented on May 31, 2021 • 0 new comments

• Better typings for Promise.all(), like #31117

  #33055 commented on May 31, 2021 • 0 new comments

• Better typings for Promise.resolve(), like #31117

  #33074 commented on May 31, 2021 • 0 new comments

• Only apply indexed access write simplifications to types that arise from mutation

  #33089 commented on May 31, 2021 • 0 new comments

• Better typings for Promise.then(), like #31117

  #33103 commented on May 31, 2021 • 0 new comments

• Higher order this parameter inference, like #31116

  #33139 commented on May 31, 2021 • 0 new comments

• Add Dependent-Type-Like Functions [Experiment]

  #33237 commented on May 31, 2021 • 0 new comments

• Structural `tag type` brands

  #33290 commented on May 31, 2021 • 0 new comments

• Change default for TNext in Iterator/AsyncIterator

  #33497 commented on May 31, 2021 • 0 new comments

• fix: add this type for Reflect.defineProperty

  #33544 commented on May 31, 2021 • 0 new comments

• Delete the {} and unconstrained type parameter assignability rule

  #33570 commented on May 31, 2021 • 0 new comments

• Better typings for Array.concat(), etc.

  #33645 commented on May 31, 2021 • 0 new comments

• Emit comments and newlines only once even with initializers added by the transformer

  #33673 commented on May 31, 2021 • 0 new comments

• Better typings for Promise, like #31117

  #33707 commented on May 31, 2021 • 0 new comments

• Add an overload to Object.freeze that preserves literal types

  #33767 commented on May 31, 2021 • 0 new comments

• Use @definitelytyped/types-registry for ATA

  #33791 commented on May 31, 2021 • 0 new comments

• Add shim for ES Promise

  #33863 commented on May 31, 2021 • 0 new comments

• Cache global tagged template objects

  #34518 commented on May 31, 2021 • 0 new comments

• Perform weak type checks when performing comparisons.

  #34598 commented on May 31, 2021 • 0 new comments

• Try some functional refactor of some parser code

  #35127 commented on May 31, 2021 • 0 new comments

• Native support for PnP

  #35206 commented on May 31, 2021 • 0 new comments

• Defer generic awaited type

  #35284 commented on May 31, 2021 • 0 new comments

• [WIP] Migrate _everything_ to modules

  #35561 commented on May 31, 2021 • 0 new comments

• feat(lib/es2015): Add typed overloads to `Reflect`

  #35608 commented on May 31, 2021 • 0 new comments

• Type comparison when conditional type is target

  #35741 commented on May 31, 2021 • 0 new comments

• No error on indirect calls

  #35878 commented on May 31, 2021 • 0 new comments

• Added quick-fix to rewrite index access as call to get/set method.

  #35885 commented on May 31, 2021 • 0 new comments

• Added elaborations for parent or child access.

  #35913 commented on May 31, 2021 • 0 new comments

• Remove usage of non-standardised `Reflect.decorate`.

  #36408 commented on May 31, 2021 • 0 new comments

• Allow specifying TReturn and TNext for AsyncIterableIterator and AsyncIterable

  #36723 commented on May 31, 2021 • 0 new comments

• Merge diagnosticsProducing and nonDiagnosticsProducing checkers into a single checker supporting lazy diagnostics

  #36747 commented on May 31, 2021 • 0 new comments

• Add support for Inverse Offset and Range types

  #36789 commented on May 31, 2021 • 0 new comments

• Add separate PrivateIdentifier and SourceFile constructors

  #36844 commented on May 31, 2021 • 0 new comments

• Error on immediate casts of literals to incompatible literal types

  #37065 commented on May 31, 2021 • 0 new comments

• Fix handling of string enums on LHS of `+=`

  #37297 commented on May 31, 2021 • 0 new comments

• Make importCall and importMeta utils public

  #37376 commented on May 31, 2021 • 0 new comments

• POC: allow project references to be resolved relative to outDir

  #37509 commented on May 31, 2021 • 0 new comments

• Add 'T | PromiseLike<T>' inference from awaited types

  #37615 commented on May 31, 2021 • 0 new comments

• Re-order reduce overloads

  #37702 commented on May 31, 2021 • 0 new comments

• Preserve source newlines all the things

  #37814 commented on May 31, 2021 • 0 new comments

• Remove redundant intersections from unions

  #37815 commented on May 31, 2021 • 0 new comments

• Infer extracted local variable name from property name

  #37902 commented on May 31, 2021 • 0 new comments

• Fix instantiated check for imports

  #37962 commented on May 31, 2021 • 0 new comments

• Fix missing narrow with assignment

  #38088 commented on May 31, 2021 • 0 new comments

• Fix return type for JSON.stringify(any) -> string

  #38574 commented on May 31, 2021 • 0 new comments

• Type guard by deep property

  #38839 commented on May 31, 2021 • 0 new comments

• Emit AND instead of ternary for optional chains in expression statements

  #38878 commented on May 31, 2021 • 0 new comments

• Allow arrow function parameter parsing to bail out during speculation

  #39014 commented on May 31, 2021 • 0 new comments

• Adjust TypeFact calculation for intersections to omit negative typeof facts when an equivalent positive fact is present

  #39016 commented on May 31, 2021 • 0 new comments

• Reduce rest parameter if not referenced

  #39188 commented on May 31, 2021 • 0 new comments

• Erase type parameters to a type which behaves as never in a union and unknown in an intersection or any otherwise

  #39217 commented on May 31, 2021 • 0 new comments

• Implement await.ops

  #39224 commented on May 31, 2021 • 0 new comments

• Use a single relation stack for nested dependent variance calculations

  #39232 commented on May 31, 2021 • 0 new comments

• Improve inference for Promise.all of 'never[]'

  #39336 commented on May 31, 2021 • 0 new comments

• #24210: Updated handling of undefined values in Enum types

  #39390 commented on May 31, 2021 • 0 new comments

• Add Intl.locale types

  #39664 commented on May 31, 2021 • 0 new comments

• [WIP] Update parser and diagnostics for numbers starting with zero

  #39698 commented on May 31, 2021 • 0 new comments

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

  #39699 commented on May 31, 2021 • 0 new comments

• Type reference directive improvements

  #39708 commented on May 31, 2021 • 0 new comments

• Hoist import declarations when transforming to commonjs/amd/umd module

  #39764 commented on May 31, 2021 • 0 new comments

• Support pulling type information directly from `.wasm` modules

  #39784 commented on May 31, 2021 • 0 new comments

• Add variadic tuple overload to Promise.all

  #39796 commented on May 31, 2021 • 0 new comments

• Fix 39749: specialize jsx error for missing properties.

  #39808 commented on May 31, 2021 • 0 new comments

• Make direct assignments to cjs exports considered literal contexts

  #39816 commented on May 31, 2021 • 0 new comments

• Convert destruction

  #39832 commented on May 31, 2021 • 0 new comments

• Add support for `.cjs` and `.mjs` input files

  #39840 commented on May 31, 2021 • 0 new comments

• Triple-slash comments for JSDoc

  #39930 commented on May 31, 2021 • 0 new comments

• QuickInfo of element access expression could shows correct type when it is narrowed.

  #40014 commented on May 31, 2021 • 0 new comments

• (WiP) Working .cjs, .mjs interop for tsc, tsserver

  #40068 commented on May 31, 2021 • 0 new comments

• Add support for pedanticBooleanCoercions

  #40148 commented on May 31, 2021 • 0 new comments

• Pedantic safe any

  #40178 commented on May 31, 2021 • 0 new comments

• Experiment: Implement Bind Operator

  #40200 commented on May 31, 2021 • 0 new comments

• Better best effort type alias preservation

  #40232 commented on May 31, 2021 • 0 new comments

• Emit error when trying to iterate a value with union type with non-iterable constituent when --downlevelIterator

  #40288 commented on May 31, 2021 • 0 new comments

• Don't widen inferred return types when a contextual signature is available

  #40311 commented on May 31, 2021 • 0 new comments

• Mark comparisons of union constituents involving markers as being unreliable sources of variance

  #40358 commented on May 31, 2021 • 0 new comments

• A simple try for HKT

  #40368 commented on May 31, 2021 • 0 new comments

• Add inference for 'Promise' based on call to 'resolve'

  #40466 commented on May 31, 2021 • 0 new comments

• Throw types

  #40468 commented on May 31, 2021 • 0 new comments

• Fix top level logical assignment leak

  #40536 commented on May 31, 2021 • 0 new comments

• Add Remove type annotation or convert to jsdoc refactor

  #40628 commented on May 31, 2021 • 0 new comments

• Add item method

  #40697 commented on May 31, 2021 • 0 new comments

• Import assertion

  #40698 commented on May 31, 2021 • 0 new comments

• Parse quoted names in qualified names

  #40708 commented on May 31, 2021 • 0 new comments

• Treat void-typed properties as optional

  #40823 commented on May 31, 2021 • 0 new comments

• Add IteratorVoidReturnResult for optional 'value' when done

  #40825 commented on May 31, 2021 • 0 new comments

• Update the Enum Members Error to be like TS2713

  #40888 commented on May 31, 2021 • 0 new comments

• Fix object.assign first param constraint

  #40909 commented on May 31, 2021 • 0 new comments

• Textually search for 'return' before exploring the tree for 'return' statements.

  #40917 commented on May 31, 2021 • 0 new comments

• Use the faster implmentation of the 2020 syntaxtical classifications

  #40949 commented on May 31, 2021 • 0 new comments

• Fixes #35735: Avoids listing missing properties for types with only call/construct signatures

  #40973 commented on May 31, 2021 • 0 new comments

• Add support of spread enum member

  #40998 commented on May 31, 2021 • 0 new comments

• [WIP] Persist resolutions and program information and reuse it when building program incrementally or during editor

  #41004 commented on Jun 4, 2021 • 0 new comments

• Make map constructor generic

  #41008 commented on May 31, 2021 • 0 new comments

• Check for 'void' before indexing into a type.

  #41022 commented on May 31, 2021 • 0 new comments

• Remove `undefined` from source type of renaming destructuring assignment with default

  #41042 commented on May 31, 2021 • 0 new comments

• Forbid property renaming in destructuring binding in function types

  #41044 commented on May 31, 2021 • 0 new comments

• Use the wildcard type for signature erasure

  #41067 commented on May 31, 2021 • 0 new comments

• Narrow spreaded object types

  #41100 commented on May 31, 2021 • 0 new comments

• [Experiment] Enum annotation sugar

  #41110 commented on May 31, 2021 • 0 new comments

• Be more specific when normalizing intersections containing tuples as tuple elements

  #41169 commented on May 31, 2021 • 0 new comments

• Organize imports should not return edits if no work is done

  #41199 commented on May 31, 2021 • 0 new comments

• New flag assumeChangesAffectShape for incremental and watch scenario

  #41219 commented on May 31, 2021 • 0 new comments

• fix(41268): Replace leading tabs in diagnostic code with spaces

  #41269 commented on May 31, 2021 • 0 new comments

• fix(38388) Add support for `this` parameters in iterationTypes and fix caching issues

  #41451 commented on May 31, 2021 • 0 new comments

• WIP: in narrowing with record types

  #41478 commented on May 31, 2021 • 0 new comments

• Switches the bundlePackageName error message to be a suggestion, and not a compiler error

  #41510 commented on May 31, 2021 • 0 new comments

• importHelpers: only import direct dependencies with ESM

  #41545 commented on May 31, 2021 • 0 new comments

• Un‑consolidate and fix `WeakMap` constructor overloads

  #41635 commented on May 31, 2021 • 0 new comments

• Track source and target relationship stack depth seperately, only increase on change in value

  #41821 commented on May 31, 2021 • 0 new comments

• Use hash of source file text as version for the source file in tsserver

  #41938 commented on May 31, 2021 • 0 new comments

• Display correct message for iterrable string for missing downlevel iterator flag

  #41948 commented on May 31, 2021 • 0 new comments

• fix(35050): Decorator emit incorrect within `try` block

  #41951 commented on May 31, 2021 • 0 new comments

• Fix references to generated factory imports in system+react-jsx[dev] emit

  #41983 commented on May 31, 2021 • 0 new comments

• preserve this when extracting functions

  #41992 commented on May 31, 2021 • 0 new comments

• Allow accessors to override non-class or abstract properties

  #41994 commented on May 31, 2021 • 0 new comments

• Strict subtype relation uses strict variance for all signatures in SFT mode

  #41995 commented on May 31, 2021 • 0 new comments

• allow unused private well-known symbol members

  #42104 commented on May 31, 2021 • 0 new comments

• Constraint 'SyntaxKind' to 'TokenSyntaxKind' for generic "TKind" in Token<TKind>

  #42111 commented on May 31, 2021 • 0 new comments

• Feat/quick fix for types

  #42126 commented on May 31, 2021 • 0 new comments

• make boolean literal be a literal expression

  #42154 commented on May 31, 2021 • 0 new comments

• support type inference of object non-literal keys

  #42158 commented on May 31, 2021 • 0 new comments

• [Experiment] feat(17227): Support `@abstract` JSDoc tag

  #42186 commented on May 31, 2021 • 0 new comments

• Fix leaked alias symbol independent type params in printback

  #42211 commented on May 31, 2021 • 0 new comments

• If a silent never survives through inference, instantiate it away into...

  #42244 commented on May 31, 2021 • 0 new comments

• Preserve source newlines all the things

  #42303 commented on May 31, 2021 • 0 new comments

• A second attempt at readonly array support persisting through isArray

  #42316 commented on May 31, 2021 • 0 new comments

• feat: support __proto__ in object literal

  #42359 commented on May 31, 2021 • 0 new comments

• [P in keyof T]: T[P] not accepting inferred base type via extends

  #42382 commented on May 31, 2021 • 0 new comments

• Avoid using variance results when relating `any` type arguments for positions originating in intersections

  #42414 commented on May 31, 2021 • 0 new comments

• Don't allow renaming elements from node_modules

  #42434 commented on May 31, 2021 • 0 new comments

• Allow Not-null assertion fallback to assume initialize

  #42478 commented on May 31, 2021 • 0 new comments

• Use homomorphic templated type for Omit

  #42524 commented on May 31, 2021 • 0 new comments

• Add 'bitflags' modifier for enum.

  #42533 commented on May 31, 2021 • 0 new comments

• Use related spans for "implement abstract class" errors

  #42546 commented on May 31, 2021 • 0 new comments

• Fix definition of `Array.prototype[Symbol.unscopables]`

  #42566 commented on May 31, 2021 • 0 new comments

• Error message improvements for unions with identical discriminants

  #42598 commented on May 31, 2021 • 0 new comments

• Indexing tuple intersection type beyond length produces unexpected type

  #42602 commented on May 31, 2021 • 0 new comments

• Don’t resolve an index-less module specifier if another file has the same name as the directory

  #42634 commented on May 31, 2021 • 0 new comments

• Ensure library name mangling takes place during module resolution in typeRoots

  #42658 commented on May 31, 2021 • 0 new comments

• Add an early bail when structurally comparing similar types

  #42726 commented on May 31, 2021 • 0 new comments

• fix(42734): TS18030: An optional chain cannot contain private identifiers

  #42743 commented on May 31, 2021 • 0 new comments

• When an intersection is going to produce an expression too complex error...

  #42772 commented on May 31, 2021 • 0 new comments

• fix(42678): detect access to uninitialized variable in IIFE

  #42776 commented on May 31, 2021 • 0 new comments

• feat(22770): Implement interface should not add optional properties

  #42802 commented on May 31, 2021 • 0 new comments

• Make IdentifierPart contain ZWNJ/ZWJ in ES6

  #42804 commented on May 31, 2021 • 0 new comments

• Uncalled function checks only works with single conditional

  #42835 commented on May 31, 2021 • 0 new comments

• Add isolatedModules error for ambiguous imports referenced in decorator metadata

  #42915 commented on May 31, 2021 • 0 new comments

• fix: revamp es2020.intl.d.ts

  #42945 commented on May 31, 2021 • 0 new comments

• Infer type of method parameter from base class

  #42953 commented on May 31, 2021 • 0 new comments

• Make initial incremental/watch builds as fast normal builds

  #42960 commented on May 31, 2021 • 0 new comments

• Specific diagnostic suggestions for unexpected keyword or identifier

  #43005 commented on May 31, 2021 • 0 new comments

• Uncalled function checks don't work with negation

  #43097 commented on May 31, 2021 • 0 new comments

• make "es2017 lib" error message casing consistent

  #43102 commented on May 31, 2021 • 0 new comments

• Change static fields emits

  #43114 commented on May 31, 2021 • 0 new comments

• Fix late bound method name assignment, added tests

  #43344 commented on May 31, 2021 • 0 new comments

• Few random improvements related to getting a `DiagnosticWithLocation`

  #43364 commented on May 31, 2021 • 0 new comments

• Proposal class static block support

  #43370 commented on May 31, 2021 • 0 new comments

• Make Map constructor argument optional and nullable

  #43396 commented on May 31, 2021 • 0 new comments

• Server commands from tsserver log file

  #43468 commented on May 31, 2021 • 0 new comments

• Add --metadataDecorator option

  #43542 commented on May 31, 2021 • 0 new comments

• Add a reusable '0' literal for the module transform

  #43543 commented on May 31, 2021 • 0 new comments

• 🤖 User test baselines have changed for refs/heads/master

  #43554 commented on May 31, 2021 • 0 new comments

• Added recursive check for nested tuple elements

  #43567 commented on May 31, 2021 • 0 new comments

• Add support for Hack(#) -style Pipeline Operator

  #43617 commented on May 31, 2021 • 0 new comments

• Use Set<T> for faster lookup of "maybe related" type pairs

  #43623 commented on May 31, 2021 • 0 new comments

• Skip typedef in services get js doc tags

  #43677 commented on May 31, 2021 • 0 new comments

• Update lib types to mark Annex B as deprecated

  #43710 commented on May 31, 2021 • 0 new comments

• Detect circularities printing recursive conditional types

  #43733 commented on May 31, 2021 • 0 new comments

• Use an array for building up mappings in the sourcemap generator.

  #43785 commented on May 31, 2021 • 0 new comments

• Adds a trace note about missing using typesVersion because it's not in the package subtree

  #43793 commented on May 31, 2021 • 0 new comments

• Add assertion on invalid cache set

  #43845 commented on May 31, 2021 • 0 new comments

• During inference discriminate the target type before falling back to close-matching types

  #43853 commented on May 31, 2021 • 0 new comments

• More effective call arguments/prototype

  #43882 commented on May 31, 2021 • 0 new comments

• Mark conditional extends as Unmeasurable and use a conditional-opaque wildcard for type erasure

  #43887 commented on May 31, 2021 • 0 new comments

• Update the contributing docs

  #43931 commented on May 31, 2021 • 0 new comments

• Fix contextual discrimination for omitted members

  #43937 commented on May 31, 2021 • 0 new comments

• Branch to diagnose resolution and watch issues

  #43971 commented on May 31, 2021 • 0 new comments

• More accurate translation for "Function Expression"

  #43976 commented on May 31, 2021 • 0 new comments

• Add missing currencyDisplay to resolved number format options

  #44006 commented on May 31, 2021 • 0 new comments

• Add Intl.DisplayNames types

  #44022 commented on May 31, 2021 • 0 new comments

• Fixes #44005 - Comments leak into transformer-synthesized lists

  #44048 commented on May 31, 2021 • 0 new comments

• Move some commonly missing required sourceFile fields into the node factory

  #44064 commented on May 31, 2021 • 0 new comments

• avoid computing a full shape for indirectly invalidated files

  #44090 commented on May 31, 2021 • 0 new comments

• Manually walk to make normalizeSlashes a no-op

  #44101 commented on May 31, 2021 • 0 new comments

• fix(41299): Support Intl.NumberFormat.formatToParts in ES2018

  #44107 commented on May 31, 2021 • 0 new comments

• Add `--importsNotUsedAsValues=preserve-exact`

  #44137 commented on May 31, 2021 • 0 new comments

• fixes(44110): allow "extract to inner function" refactoring inside function expression

  #44206 commented on May 31, 2021 • 0 new comments

• Array.prototype.sort - remove the need for compareFn to handle undefined values

  #44216 commented on May 31, 2021 • 0 new comments

• fix(43298): Function refactor removes comment

  #44236 commented on May 31, 2021 • 0 new comments

• Rewrite createTextWriter to buffer appends

  #44242 commented on May 31, 2021 • 0 new comments

• fixes(44060): "Extract to function": parameter type missing when extracting code that depends on node_modules

  #44254 commented on May 31, 2021 • 0 new comments

• feat(44263): Provide quick fix for misspelled override error

  #44266 commented on May 31, 2021 • 0 new comments

• support JSDoc comments inherited for parameter properties

  #44329 commented on May 31, 2021 • 0 new comments

• fix: infer from usage duplicate

  #44330 commented on May 31, 2021 • 0 new comments