Simon Willison’s Weblog

22nd August 2020

TIL Dynamically loading multiple assets with a callback — For [datasette-leaflet-geojson](https://github.com/simonw/datasette-leaflet-geojson) I wanted to dynamically load some external CSS and JavaScript and then execute some code once they had loaded ([issue 14](https://github.com/simonw/datasette-leaflet-geojson/issues/14)).

Posted 22nd August 2020 at 4:23 am

Recent articles

GPT-5.4 mini and GPT-5.4 nano, which can describe 76,000 photos for $52 - 17th March 2026
My fireside chat about agentic engineering at the Pragmatic Summit - 14th March 2026
Perhaps not Boring Technology after all - 9th March 2026

This is a beat by Simon Willison, posted on 22nd August 2020.

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