The character cell has a pulse.
ascii.rest packages animated ASCII for React, Next.js, Astro, and plain HTML. Its plain HTML route defines an <ascii-art> custom element from one module script. The project says text pieces draw into a <pre>, while colored pieces use a canvas unless the caller requests one-color output.[1]
The repository names ES modules, custom elements, and IntersectionObserver as browser requirements. Colored pieces also need ResizeObserver. That is a compact contract. It also tells you this is running interface code, not a decorative font trick.[2]
ASCII cuts image weight. It does not cancel timing, focus, network, or motion responsibilities.
Count drift is part of the product.
The live site and a later README paragraph describe 191 pieces. The same README still opens with 169 pieces. The mismatch does not break the renderer. It does show why a hand-maintained catalog count gets stale.
Generate the public total from the same registry that powers imports. If the homepage needs a rounded claim, omit the exact number. A tiny library earns trust when its labels come from its shipped data.
Autoplay needs a reason and a brake.
The library says its HTML tag plays while visible and holds the first frame for people who prefer reduced motion. MDN defines prefers-reduced-motion as the browser signal for a device setting that asks interfaces to remove, reduce, or replace nonessential motion.[3]
That preference is one gate. It is not the only control. WCAG 2.2 says moving content that starts automatically, lasts more than five seconds, and sits beside other content needs a way to pause, stop, or hide it unless the motion is essential.[4] A product demo, terminal replay, or animated hero usually has room for a pause button.
The clean default is parked. Show the first frame in HTML. Start after a button press. Pause when the page is hidden or the component leaves the viewport. Keep the status text outside the rapidly changing frame so a screen reader does not announce every tick.
Choose text or canvas on purpose.
A <pre> keeps text selectable and inspectable. It can also reflow badly if the font, line height, or container width changes. A canvas protects exact visual geometry but does not expose the drawn characters as document text. Give either route a concise accessible label. Put any data or instruction shown in the animation into ordinary HTML too.
The direct HTML embed loads code and piece data from ascii.rest. That is convenient for a demo. A production site should decide whether that external route fits its content security policy, uptime plan, and privacy rules. The repository is MIT licensed and exposes installable source, so bundling or self-hosting is an available engineering choice. Review the license and update route before copying files.
Use this motion preflight.
- Render a useful first frame in the shipped HTML.
- Use a button for start, pause, step, and reset when readers may study adjacent copy.
- Read
prefers-reduced-motionbefore any automatic start. - Stop timers while hidden or offscreen.
- Keep meaning outside the animation in text that does not change every frame.
- Test narrow widths, zoom, the slowest speed, and the fastest allowed speed.
- Name the code origin, license, update route, and failure fallback.
ASCII MOTION RELEASE CARD FIRST_FRAME=[VISIBLE IN HTML] START=[USER ACTION / JUSTIFIED AUTO] PAUSE=[VISIBLE CONTROL] REDUCED_MOTION=[HELD / REPLACED] OFFSCREEN=[PAUSED] SEMANTIC_LABEL=[REQUIRED] MEANING_OUTSIDE_FRAMES=[YES] CODE_ORIGIN=[LOCAL / REVIEWED REMOTE] FALLBACK=[STATIC FRAME] STATUS=[REVIEW THESE FIELDS BEFORE RELEASE]