zloirock/core-js

Add support for `requestIdleCallback`

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#846 opened on Jul 20, 2020

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 (10 comments) (8 reactions) (0 assignees)JavaScript (23,771 stars) (1,609 forks)batch import
help wantedweb standards

Description

https://w3c.github.io/requestidlecallback/

Looks like this can mostly be done simply by using setTimeout code, and seems quite simple to polyfill (if I get the time I'll create a PR).

Currently only Safari is missing this entirely.

Contributor guide

Tech stack
javascript
Domain
frontend
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
under 1 hour
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
JavaScript basicssetTimeout knowledge
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70
Research direction
This issue requests a polyfill for `requestIdleCallback`. The body suggests using `setTimeout` as a fallback. Review existing polyfills in the core js repository to understand the pattern (e.g., `./packages/core js/modules/`). Check comments for any edge cases or performance considerations. Implement a simple wrapper that calls `setTimeout` with a delay to simulate idle callback scheduling.