Demos
Frontend techniques, measured.
Small interactive demos of frontend techniques. Each one shows a before and after with live measurements.
List virtualization
The same 100,000-color list rendered two ways: every row mounted, or only the rows in view. Switch between them and feel the difference.
Web Workers
Build a palette from 100,000 colors on the main thread or in a Web Worker. One freezes the page; the other keeps it smooth.
Out-of-order responses
Search as you type, and a slow reply to an old query can overwrite the right results. Watch it happen, then fix it by cancelling stale requests.
Design system
The buttons, toggles and tags this site is built from, with live examples and where each one is used.