Simon Willison’s Weblog

Leak Free Javascript Closures. This is some pretty brilliant JavaScript voodoo.

Posted 27th October 2005 at 1:52 pm

Recent articles

First impressions of Claude Cowork, Anthropic's general agent - 12th January 2026
My answers to the questions I posed about porting open source code with LLMs - 11th January 2026
Fly's new Sprites.dev addresses both developer sandboxes and API sandboxes at the same time - 9th January 2026

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