Simon Willison’s Weblog

30th December 2020

TIL Using Jest without a package.json — I wanted to try out [Jest](https://jestjs.io/) for writing JavaScript unit tests, in a project that wasn't set up with `package.json` and other NPM related things.

None

Posted 30th December 2020 at 10:36 pm

Recent articles

Is Claude Code going to cost $100/month? Probably not - it's all very confusing - 22nd April 2026
Where's the raccoon with the ham radio? (ChatGPT Images 2.0) - 21st April 2026
Changes in the system prompt between Claude Opus 4.6 and 4.7 - 18th April 2026

This is a beat by Simon Willison, posted on 30th December 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