Simon Willison’s Weblog

A tour of JavaScript timers on the web (via) By Nolan Lawson. Do you understand the differences between setTimeout, setInterval, setImmediate, requestAnimationFrame and requestIdleCallback? I didn't.

Posted 2nd September 2018 at 10:10 am

Recent articles

My Lethal Trifecta talk at the Bay Area AI Security Meetup - 9th August 2025
The surprise deprecation of GPT-4o for ChatGPT consumers - 8th August 2025
GPT-5: Key characteristics, pricing and model card - 7th August 2025

javascript 718 nolan-lawson 4

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe