Insights: microsoft/TypeScript

12 Pull requests merged by 5 people

• Added override keyword to codefix implemented abstract methods

  #51033 merged Dec 16, 2022

• feat(51000) - Flag Deprecation Plan

  #51424 merged Dec 15, 2022

• `const` modifier on type parameters

  #51865 merged Dec 16, 2022

• Monomorphic Symbol access

  #51880 merged Dec 15, 2022

• Fix excess property checking for intersections with index signatures

  #51894 merged Dec 16, 2022

• Move auto-generated identifier info into separate object

  #51900 merged Dec 15, 2022

• Rename module resolution option `node` to `node10` (preserving backward-compatible alias)

  #51901 merged Dec 15, 2022

• Add JSDocOverloadTag to ForEachChildTable

  #51907 merged Dec 16, 2022

• Remove isJSDocOptionalParameter and isOptionalDeclaration from public API

  #51908 merged Dec 15, 2022

• fix(51920): "Add missing members" quick fixes incorrectly add TypeScript types in JavaScript files

  #51922 merged Dec 16, 2022

• skip optional parameters in js files

  #51924 merged Dec 16, 2022

• Allow `const` modifiers on class expression type parameters

  #51935 merged Dec 17, 2022

7 Pull requests opened by 4 people

• [wip] Remove `objectAllocator` concept

  #51913 opened Dec 15, 2022

• Gabritto/issue48313

  #51914 opened Dec 15, 2022

• Resolve contextual computed properties with non-bindable names

  #51915 opened Dec 15, 2022

• Switch imports back to case sensitive sorting

  #51916 opened Dec 15, 2022

• Further clean up core.ts helpers (Array.from, real iterators, etc)

  #51921 opened Dec 16, 2022

• Add an extra digit to time statistics

  #51929 opened Dec 17, 2022

• Support outlining in multiline import/export decls

  #51937 opened Dec 17, 2022

20 Issues closed by 10 people

• Generics that extend any fail further type checks

  #51872 closed Dec 17, 2022

• 'this' operator cannot correctly deduce the type

  #51902 closed Dec 17, 2022

• `const` type parameter modifier not permitted on class expressions

  #51934 closed Dec 17, 2022

• Functions can ignore type restrictions by receiving a parameter as a wider type

  #51851 closed Dec 17, 2022

• 4.9.4 starts reporting does not satisfy the constraint, on non active extends cases

  #51928 closed Dec 16, 2022

• Missing types for WebTransport API W3C Current Spec (as implemented in Chrome/Edge atm)

  #51912 closed Dec 16, 2022

• Support Const Type Constraint

  #41114 closed Dec 16, 2022

• Suggestion: Const contexts for generic type inference

  #30680 closed Dec 16, 2022

• skipLibCheck doesn't work with typesVersions

  #51861 closed Dec 16, 2022

• Quick fix: "Implement inherited abstract class" should add override keyword to methods

  #50464 closed Dec 16, 2022

• "Add missing members" quick fixes incorrectly add TypeScript types in JavaScript files

  #51920 closed Dec 16, 2022

• Array.prototype.includes fails type-checking when used with Enum subsets

  #51881 closed Dec 16, 2022

• Optional types syntax (2 defs: w/ `type` and w/ inline definition) - closed prematurely

  #51883 closed Dec 16, 2022

• How to print anonymous recursive types

  #463 closed Dec 16, 2022

• Unexpected excess property error with intersection of index signatures

  #51875 closed Dec 16, 2022

• Unexpected overload signature is matched with constructor type

  #51899 closed Dec 15, 2022

• proagram doesn't typecheck anymore in 4.9

  #51910 closed Dec 15, 2022

• Flag Deprecation Plan

  #51000 closed Dec 15, 2022

• Higher order type inference from generic functions lost when result type is wrapped

  #51850 closed Dec 15, 2022

• Conditional operator null checking does not work as intended in nested objects.

  #51904 closed Dec 15, 2022

17 Issues opened by 15 people

• TSDoc link {@link Foo.foo} is not displayed properly in VSCode

  #51938 opened Dec 17, 2022

• Expose completion entry symbol for plugins API

  #51936 opened Dec 17, 2022

• Enum type inference

  #51933 opened Dec 17, 2022

• Does not narrow down type from Discriminated Union (discriminants) after destructuring

  #51932 opened Dec 17, 2022

• `const` doesn't work with `extends`

  #51931 opened Dec 17, 2022

• [Suggestion] a "const mode" where `as const` is by default for literals

  #51930 opened Dec 17, 2022

• Optional types syntax (2 defs: w/ `type` and w/ inline definition)

  #51926 opened Dec 16, 2022

• Fails to propagate returned generic type as argument of another function

  #51925 opened Dec 16, 2022

• Re-exporting CJS module with `export =` from ESM via `export *` causes type error

  #51923 opened Dec 16, 2022

• Consider making "Add missing function declaration" declare a more permissive function on decorators

  #51919 opened Dec 16, 2022

• JSDoc after a decorator is not picked up

  #51918 opened Dec 16, 2022

• Ability for ES module to be declared as an `any` type either via its text or via the compiler API during resolution

  #51917 opened Dec 16, 2022

• `super` constructor() promotion

  #51911 opened Dec 15, 2022

• Feedback: 5.0 deprecations

  #51909 opened Dec 15, 2022

• Property with name from computed from function call incorrectly has its value widened

  #51906 opened Dec 15, 2022

• TSServer getCodeFixes results in `Debug Failure. False expression: Token end is child end`

  #51905 opened Dec 15, 2022

• vscode stuck on Initializing JS/TS language features on Apple Silicon.

  #51927 opened Dec 15, 2022

75 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.

• Implement the Stage 3 Decorators Proposal

  #50820 commented on Dec 16, 2022 • 10 new comments

• Add undefined to JSON.stringify return type

  #51897 commented on Dec 16, 2022 • 10 new comments

• "The inferred type of X cannot be named without a reference to Y" (TS2742) occurs when multiple modules with the same package ID are resolved

  #47663 commented on Dec 16, 2022 • 8 new comments

• JSX incorrectly infering types

  #51863 commented on Dec 17, 2022 • 6 new comments

• feat(48665): tsconfig "extends" field ignores "exports" field of source package

  #50955 commented on Dec 17, 2022 • 6 new comments

• Instantiation expressions inconsistently trigger incorrect error messages in editor contexts

  #50161 commented on Dec 16, 2022 • 5 new comments

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

  #37053 commented on Dec 17, 2022 • 4 new comments

• TypeScript 5.0 Iteration Plan

  #51362 commented on Dec 17, 2022 • 4 new comments

• A way to specify class properties using JSDoc

  #26811 commented on Dec 17, 2022 • 4 new comments

• @ts-ignore for the block scope and imports

  #19573 commented on Dec 18, 2022 • 4 new comments

• Proposal: Partial Type Argument Inference

  #26242 commented on Dec 16, 2022 • 3 new comments

• Add Array.prototype.findLast() and Array.prototype.findLastIndex()

  #49636 commented on Dec 16, 2022 • 3 new comments

• lib Fix Part 2/6 – Array-related methods

  #50450 commented on Dec 17, 2022 • 3 new comments

• feat(51086): satisfies support in JSDoc

  #51753 commented on Dec 17, 2022 • 3 new comments

• Gabritto/issue48364

  #51799 commented on Dec 17, 2022 • 3 new comments

• Solution for narrowing `unknown`

  #51903 commented on Dec 15, 2022 • 2 new comments

• Add missing function declaration code action does not appear when there is similar name in the file

  #51891 commented on Dec 16, 2022 • 2 new comments

• Issue a more useful error when attempting to construct non-newable type

  #227 commented on Dec 16, 2022 • 2 new comments

• Renaming file triggers error in tsconfig.json

  #46432 commented on Dec 17, 2022 • 2 new comments

• Tsconfig show typescript file not found error after moving it to another directory or delete it.

  #43838 commented on Dec 17, 2022 • 2 new comments

• Trade-offs in Control Flow Analysis

  #9998 commented on Dec 15, 2022 • 1 new comment

• tsc --init-basic

  #46150 commented on Dec 15, 2022 • 1 new comment

• Support yarn in `Install @types/<package>` code fix

  #19269 commented on Dec 15, 2022 • 1 new comment

• [typescript] dom definitions not up to date

  #19040 commented on Dec 15, 2022 • 1 new comment

• Missing quick fix auto import option after changing moduleResolution to node16

  #51871 commented on Dec 15, 2022 • 1 new comment

• Completions: Suggest enum member or literal union Inside switch statement

  #40129 commented on Dec 15, 2022 • 1 new comment

• keyword to force calling the super on any method

  #21388 commented on Dec 16, 2022 • 1 new comment

• Extending string-based enums

  #17592 commented on Dec 16, 2022 • 1 new comment

• /** @deprecated */ support broken on mapped types

  #42609 commented on Dec 16, 2022 • 1 new comment

• typeguards only narrow types when used with unary not

  #44366 commented on Dec 16, 2022 • 1 new comment

• Polymorphic "this" for static members

  #5863 commented on Dec 16, 2022 • 1 new comment

• symbols with `keyof` are not renamed in JSDoc comments.

  #51889 commented on Dec 16, 2022 • 1 new comment

• Please add a helpful message to when the dist/ folder has been deleted but tsconfig.tsbuildinfo has not been updated

  #50646 commented on Dec 17, 2022 • 1 new comment

• JSDoc support for object literal fields

  #290 commented on Dec 17, 2022 • 1 new comment

• Annoyingly useless Symbol completions

  #28364 commented on Dec 17, 2022 • 1 new comment

• Remove `originalKeywordKind` from `Identifier`s

  #51497 commented on Dec 15, 2022 • 1 new comment

• [experiment] direct imports

  #51590 commented on Dec 17, 2022 • 1 new comment

• [type bug] fontfaces property is missing from loadingdone event object

  #51885 commented on Dec 15, 2022 • 0 new comments

• Getting type information for a node causes other nodes to return any for their type

  #48313 commented on Dec 15, 2022 • 0 new comments

• Make it possible to infer superclass type parameters / constructor overload from the `super` call

  #36456 commented on Dec 16, 2022 • 0 new comments

• Support import maps and bare import specifiers

  #43326 commented on Dec 16, 2022 • 0 new comments

• Widening after inferring null or undefined for a type parameter should be an implicit any

  #531 commented on Dec 16, 2022 • 0 new comments

• Auto-accessors generate bad JS when there is a name conflict with the generated backing field

  #51888 commented on Dec 16, 2022 • 0 new comments

• Auto-accessors generate bad JS with esnext and useDefineForClassFields:false

  #51887 commented on Dec 16, 2022 • 0 new comments

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

  #11920 commented on Dec 17, 2022 • 0 new comments

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

  #33471 commented on Dec 17, 2022 • 0 new comments

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

  #39114 commented on Dec 17, 2022 • 0 new comments

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

  #39650 commented on Dec 17, 2022 • 0 new comments

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

  #39681 commented on Dec 17, 2022 • 0 new comments

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

  #39853 commented on Dec 17, 2022 • 0 new comments

• Unexpected behavior (possible bug)

  #39970 commented on Dec 17, 2022 • 0 new comments

• Support “Arbitrary module namespace identifier names”

  #40594 commented on Dec 17, 2022 • 0 new comments

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

  #41007 commented on Dec 17, 2022 • 0 new comments

• Compile error if I named last array destructuring element.

  #41548 commented on Dec 17, 2022 • 0 new comments

• instanceof Promise in ternary does not narrow Promiselike in 4.1

  #41606 commented on Dec 17, 2022 • 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 Dec 17, 2022 • 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 Dec 17, 2022 • 0 new comments

• `\u` in String.raw

  #42887 commented on Dec 17, 2022 • 0 new comments

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

  #46791 commented on Dec 17, 2022 • 0 new comments

• Intersection causes incorrect type compatability

  #48720 commented on Dec 17, 2022 • 0 new comments

• Regression causes Function top-type to be callable with no arguments

  #48840 commented on Dec 17, 2022 • 0 new comments

• [NewErrors] 4.8.0-dev.20220609 vs 4.7.3

  #49460 commented on Dec 17, 2022 • 0 new comments

• Type tuples no longer inferred properly from rest arguments with mapped generic type tuples.

  #49556 commented on Dec 17, 2022 • 0 new comments

• "overload signature is not compatible" shows up more than once in the LS

  #49916 commented on Dec 17, 2022 • 0 new comments

• Regression in 4.8 where string union type widens to string

  #50635 commented on Dec 17, 2022 • 0 new comments

• Types declared in types.d.ts not included in output of tsc --emitDeclarationOnly

  #51784 commented on Dec 17, 2022 • 0 new comments

• Implement partial type argument inference using the _ sigil

  #26349 commented on Dec 16, 2022 • 0 new comments

• feat(7411): JSX namespaced attribute syntax not supported

  #47356 commented on Dec 16, 2022 • 0 new comments

• feat(25758): Computed properties no throws if there is a duplicate

  #49848 commented on Dec 15, 2022 • 0 new comments

• Enable strictFunctionTypes

  #49929 commented on Dec 18, 2022 • 0 new comments

• Tweak signature of and use insertSorted more

  #50165 commented on Dec 18, 2022 • 0 new comments

• Improve uncalled function check related to parenthesized and binary expressions

  #50756 commented on Dec 15, 2022 • 0 new comments

• fix(51202): Circular instantiation expression crashing IDEs

  #51214 commented on Dec 16, 2022 • 0 new comments

• [Experiment] Convert parser namespace into a module

  #51470 commented on Dec 17, 2022 • 0 new comments

• fix(51820): Using auto-accessor with readonly or declare should raise an error

  #51824 commented on Dec 16, 2022 • 0 new comments