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Namespaces: use before declaration is not reported

Status: Open.

#61891 In microsoft/TypeScript;

· yarden-app opened on Jun 18, 2025

Comparing arrays doesn't give any error

Status: Open.

#61889 In microsoft/TypeScript;

· DonaldDuck313 opened on Jun 18, 2025

Add <code>.isApplicableIndexType()</code> to the <code>TypeChecker</code>

Status: Open.

#61886 In microsoft/TypeScript;

· mrazauskas opened on Jun 17, 2025

(not) Deprecating <code>--rootDirs</code>

Status: Open.

#61885 In microsoft/TypeScript;

· acutmore opened on Jun 17, 2025

__esDecorate transpiled code uses "Symbol" even of this is shadowed by a local variable

Status: Open.

#61884 In microsoft/TypeScript;

· HolgerJeromin opened on Jun 17, 2025

The output structures of <code>rootDir</code> and <code>rootDirs</code> are inconsistent

QuestionAn issue which isn't directly actionable in codeAn issue which isn't directly actionable in code

Status: Open.

#61883 In microsoft/TypeScript;

· TomFryersMidsummer opened on Jun 17, 2025

Error when overriding arrow function in superclass with regular method in subclass to correctly bind <code>this</code> to super

Working as IntendedThe behavior described is the intended behavior; this is not a bugThe behavior described is the intended behavior; this is not a bug

Status: Open.

#61882 In microsoft/TypeScript;

· Zacqary opened on Jun 16, 2025

Type Guard Documentation Is Incorrectly Labeled as Deprecated

DocsThe issue relates to how you learn TypeScriptThe issue relates to how you learn TypeScript

Help WantedYou can do thisYou can do this

Status: Open.

#61881 In microsoft/TypeScript;

· ryanoboril opened on Jun 16, 2025

Module resolution: Setting <code>target</code> to <code>ES6</code> and higher results in numerous <code>TS2792: Cannot find module 'undici-types'</code> errors

QuestionAn issue which isn't directly actionable in codeAn issue which isn't directly actionable in code

Status: Open.

#61877 In microsoft/TypeScript;

· SetTrend opened on Jun 15, 2025

Detect no overlap for "in" keyword

DuplicateAn existing issue was already createdAn existing issue was already created

Status: Open.

#61874 In microsoft/TypeScript;

· StevenBrons opened on Jun 15, 2025

When there is only one member in an enumDeclaration, const enum E {A = 1}, the declared type of the enumDeclaration is incorrect

Not a DefectThis behavior is one of several equally-correct optionsThis behavior is one of several equally-correct options

Status: Open.

#61871 In microsoft/TypeScript;

· liyanch opened on Jun 15, 2025

<code>T</code> satisfies a constraint that <code>E extends T</code> does not (specifically with <code>Omit</code>)

Design LimitationConstraints of the existing architecture prevent this from being fixedConstraints of the existing architecture prevent this from being fixed

Status: Open.

#61870 In microsoft/TypeScript;

· vi013t opened on Jun 14, 2025