Simon Willison’s Weblog

4th April 2008 - Link Blog

Implementing a syntax-higlighting JavaScript editor in JavaScript. Appropriately subtitled “a brutal odyssey to the dark side of the DOM tree”. Some seriously clever trickery going on here.

Posted 4th April 2008 at 8:27 am

Recent articles

I vibe coded my dream macOS presentation app - 25th February 2026
Writing about Agentic Engineering Patterns - 23rd February 2026
Adding TILs, releases, museums, tools and research to my blog - 20th February 2026

This is a link post by Simon Willison, posted on 4th April 2008.

dom 13 javascript 743 syntaxhighlighting 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