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keyof this is computed too narrowly on a subclass that passes itself as its own type parameter, causing TS2345 / TS2322 variance failure

bugSomething isn't workingSomething isn't working

Domain: Type CheckingRelated to type checking, grammar checkingRelated to type checking, grammar checking

Status: Open.

#3494 In microsoft/typescript-go;

· tomquist opened on Apr 22, 2026

maxNodeModuleJsDepth + allowJs does not load types from a CommonJS dependency in node_modules (TS7016 vs tsc 6.0 success)

Status: Open.

#3493 In microsoft/typescript-go;

· tomquist opened on Apr 22, 2026

·  

TypeScript 7.0 RC

tsgo rejects unknown JSX props that appear before a {...spread} and are accepted by tsc 6.0

Status: Open.

#3492 In microsoft/typescript-go;

· tomquist opened on Apr 22, 2026

Excess-property check fires on a nested object literal that is later assigned to an annotated return type, where tsc 6.0 does not

Status: Open.

#3491 In microsoft/typescript-go;

· tomquist opened on Apr 22, 2026

TS2411 reported on properties declared in node_modules .d.ts files (e.g. @types/jsdom DOMWindow), where tsc 6.0 silently allows them

Status: Open.

#3490 In microsoft/typescript-go;

· tomquist opened on Apr 22, 2026

Lowercase<"İ">` differs between tsgo and tsc (Go strings.ToLower vs JS String.prototype.toLowerCase)

Status: Open.

#3489 In microsoft/typescript-go;

· tomquist opened on Apr 22, 2026

tsgo reports downstream TS2339 in ignored for-of over non-iterable union that tsc 6.0.2 does not

Status: Open.

#3487 In microsoft/typescript-go;

· songkeys opened on Apr 22, 2026

Static property conflicts with built-in Function properties (TS2699) no longer reported when useDefineForClassFields is false

Status: Open.

#3484 In microsoft/typescript-go;

· RyanCavanaugh opened on Apr 21, 2026

Corsa differences in export= module augmentation

Status: Open.

#3481 In microsoft/typescript-go;

· RyanCavanaugh opened on Apr 21, 2026

Missing error about jsx-runtime package

Status: Open.

#3480 In microsoft/typescript-go;

· RyanCavanaugh opened on Apr 21, 2026

Untriaged differences in self-package resolution (possibly test harness only)

Status: Open.

#3479 In microsoft/typescript-go;

· RyanCavanaugh opened on Apr 21, 2026

Wasm build

Status: Open.

#3478 In microsoft/typescript-go;

· justinfagnani opened on Apr 21, 2026