Simon Willison’s Weblog

30th April 2007 - Link Blog

Timing and Synchronization in JavaScript. Comprehensive overview of how browsers (Opera in particular) load scripts and queue events, with suggestions for best practices.

Posted 30th April 2007 at 2:24 pm

Recent articles

Changes in the system prompt between Claude Opus 4.6 and 4.7 - 18th April 2026
Join us at PyCon US 2026 in Long Beach - we have new AI and security tracks this year - 17th April 2026
Qwen3.6-35B-A3B on my laptop drew me a better pelican than Claude Opus 4.7 - 16th April 2026

This is a link post by Simon Willison, posted on 30th April 2007.

browsers 103 javascript 750 opera 31 timing 1

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