The Transitions.dev team traced choppy UI animations to mask-position changes that force browsers to repaint an element each frame, which in turn re-triggers an entire filter chain on the CPU. Rather than tweak the blur radius, they replaced the animated mask with a solid-colored curtain that slides via a transform, a property browsers can composite instead of repaint.
transitions.dev
· 2026-09-14
OpenArm is a newly released open-source 7-degree-of-freedom humanoid arm built for physical AI research, offering high backdrivability and compliance for safe interaction with humans. A complete bimanual system costs $6,500, and the project includes a standardized 'OpenArm Cell' testing environment for reproducible research. The team is inviting contributors, researchers, and manufacturers to join development.
github.com
· 2026-09-13
A developer found that CodePen's updated editor sends everything typed into its code fields to codepen.dev within one to two seconds, even without saving. Using a unique test marker in an HTML file, they confirmed CodePen triggered a build with save disabled and the marker still appeared verbatim in the generated preview page served from a codepen.dev subdomain.
news.ycombinator.com
· 2026-09-07
A developer launched a Show HN project that accepts a startup link plus an optional target, such as a pricing page, and generates a blunt critique framed as an obituary rather than encouragement. The tool strips personal data like addresses, emails and phone numbers before processing, and outright refuses inputs containing sensitive identifiers such as SSNs or passport numbers.
theyfell.com
· 2026-09-02