Fix setTimeout/setInterval/setImmediate functions

Description

declare function setTimeout(handler: (...args: any[]) => void, timeout?: number, ...args: any[]): number;

declare function setTimeout(handler: (...args: any[]) => void, timeout: number): number;
declare function setTimeout(handler: any, timeout?: any, ...args: any[]): number;

Contributor guide

Tech stack

typescript

Domain

developer experience

Issue type

bug

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

1-3 hours

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

stale

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

clear

Prerequisites

TypeScript knowledgelib.d.ts structure

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

70

Research direction

Investigate the current implementation of setTimeout in lib.dom.generated.d.ts or lib.core.d.ts. The expected overload signature is provided in the issue. After making the change, run the local tests to ensure no regressions. Consider also fixing setInterval and setImmediate similarly. Check if there are any existing PRs or comments suggesting a specific approach.