Border Trail — primitive for entrances & emphasis (react)

For AI agents: find the right skill in one call — curl -s "https://skills.varg.ai/api/search?q=<what the person wants>" returns the matching use case and the best skills with install commands, as markdown (Russian works too). Full index: https://skills.varg.ai/llms.txt. Every page has a markdown twin: add .md to its path. Before generating anything, show the person the options on the use-case page.

A short bright segment races around the border of a dark card in an endless loop

• Install: npx motion-primitives@latest add border-trail
• Registry: motion-primitives · Framework: react · License: MIT
• Docs and preview: https://motion-primitives.com/docs/border-trail
• Source: https://github.com/ibelick/motion-primitives/blob/main/components/core/border-trail.tsx
• Example: https://skills.varg.ai/previews/lib-motion-primitives-border-trail.mp4?v=9459 (Captured from the library’s own demo page (Motion Primitives))
• Time: Drive from the frame. Runs on its own clock (requestAnimationFrame, timers, springs or CSS). Drive it from frame / fps before rendering, or the render drifts.
• Runs: local render, free
• Aspect: any

Prompt that renders it frame-exact

Run Motion Primitives' Border Trail (https://motion-primitives.com/docs/border-trail, MIT) around a card, input or screenshot frame to show something is loading or to draw the eye. Install with npx motion-primitives@latest add border-trail. The light moves along the border with CSS offset-path while Motion animates offsetDistance from 0% to 100% on repeat, so set offsetDistance to ((frame / fps) / duration mod 1) × 100% in Remotion, or loop that tween on the paused HyperFrames timeline. Set size, the transition duration and the trail color through className (e.g. a bg gradient).

Used in

• Captioned talking clip
• Top-N listicle
• Quiz, poll & would-you-rather
• Meme format
• Countdown & launch timer
• Certificate & achievement recap

More entrances & emphasis

• Badge Pop — npx hyperframes add badge-pop
• Curtain Reveal — npx hyperframes add curtain-reveal
• Echo Smear — npx hyperframes add echo-smear
• Echo Trail — npx hyperframes add echo-trail
• Gloss Sweep — npx hyperframes add gloss-sweep
• Ink Bleed Reveal — npx hyperframes add ink-bleed-reveal