Simon Willison’s Weblog

19th February 2026

Tool Contact form — Submit contact information through this responsive form that provides real-time validation using native HTML5 attributes and CSS-only feedback. The form validates required fields including name, email, and message content, displaying checkmarks for valid inputs and error messages for invalid entries without requiring any JavaScript.

Posted 19th February 2026 at 2:41 pm

Recent articles

Is Claude Code going to cost $100/month? Probably not - it's all very confusing - 22nd April 2026
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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 19th February 2026.

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