zloirock/core-js

requestAnimationFrame polyfill

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#1,523 opened on Mar 16, 2026

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enhancementhelp wantedweb standards

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Description

Is there plans to support requestAnimationFrame?

The polyfill plans, if planned I propose to be as follows---

  • Ancient webkit and firefox: redirect to mozRAF, webkitRAF (RAF is abbreviated) / mozCAF, webkit CRAF, etc.
  • Older broswers / node: Store a list of callbacks, pump them every 16ms (so all usages of RAF animates at the same time)

Contributor guide

Research direction
Implement the requestAnimationFrame polyfill following the proposed approach: handle vendor prefixes (moz/webkit) and provide a fallback using setTimeout with 16ms interval for non supporting environments. Integrate with the core js polyfill system and add tests.
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.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaScriptWeb APIs
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70