Simon Willison’s Weblog

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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.

This is a beat by Simon Willison, posted on 19th February 2026.

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