mirror of
https://github.com/heygen-com/hyperframes.git
synced 2026-09-05 00:56:23 +00:00
Miguel Ángel
9734578e60
Restores the 208 catalog items reverted after their previews 404'd in production, this time on the payload mechanism rather than the .html files that caused the outage. The generator no longer writes a preview document to docs/public. That writer, and the machinery under it, existed only to produce files the docs host discards, so it is gone rather than bypassed. Items now embed the composition itself via a payload, which is what the previous change already does for the items that were already in the catalog. The variables explorer is parked, not restored: it drove its preview through the same unpublished .html path, so it would have shown an empty frame. Items that declare variables get the live player plus the static variables table, and reconnecting the explorer to payloads is a follow-up.
177 lines
7.6 KiB
Plaintext
177 lines
7.6 KiB
Plaintext
---
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title: "Top-Down Letters"
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description: "Letters descend from above in a pronounced staircase with zero blur."
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---
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import { InstallCommand } from "/snippets/install-command.jsx";
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<iframe
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className="w-full aspect-video rounded-xl border-0 bg-zinc-100 dark:bg-zinc-800"
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title="top-down-letters preview"
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loading="lazy"
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srcDoc={`<!doctype html><html><head><meta charset="utf-8"><style>html,body{margin:0;height:100%;overflow:hidden;background:transparent}hyperframes-player{display:block;width:100%;height:100%}</style><script src="https://cdn.jsdelivr.net/npm/@hyperframes/player@0.7/dist/hyperframes-player.global.js"><\/script></head><body><script>fetch("/public/catalog/components/top-down-letters.json").then(function(r){return r.json()}).then(function(d){var p=document.createElement("hyperframes-player");p.setAttribute("srcdoc",d.html);p.setAttribute("controls","");p.setAttribute("autoplay","");p.setAttribute("loop","");p.setAttribute("muted","");p.setAttribute("poster","https://static.heygen.ai/hyperframes-oss/docs/images/catalog/components/top-down-letters.png");document.body.appendChild(p)});<\/script></body></html>`}
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/>
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## Install
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<InstallCommand command="npx hyperframes add top-down-letters" />
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That writes one file: `compositions/components/top-down-letters.html`.
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## Variables
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Every one of these has a default, so the piece works untouched. Set the ones you
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want to change on the element:
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| Variable | Default | Accepts | What it does |
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| --- | --- | --- | --- |
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| `text` | `CASCADE` | string | Word that cascades in. Every character becomes one letter span, in source order. |
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| `distance` | `standard` | `close`, `standard`, `far` | Multiplies the drop the timeline drives, so the letters cover a shorter or longer run in the same time. |
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| `tone` | `ink` | `ink`, `paper`, `accent` | Letter colour: ink for light frames, paper for dark ones, accent rides --brand. |
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Set them with `data-variable-values` on the element that mounts it. These are the
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defaults, so this behaves exactly like the preview above until you change one:
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```html wrap
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<div
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data-composition-id="top-down-letters"
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data-composition-src="compositions/components/top-down-letters.html"
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data-variable-values='{"text":"CASCADE","distance":"standard","tone":"ink"}'
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></div>
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```
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## Source
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<Accordion title={`top-down-letters.html`}>
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```html
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<!--
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Top-Down Letters - remocn typography primitive for HyperFrames.
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Paste the markup, CSS and script into a composition. Drive the timeline
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integration from a paused GSAP timeline so renders remain deterministic.
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Variables. The script reads each one, falls back to the declared default on
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anything missing or unrecognised, and writes the result either into the
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markup or into a custom property the CSS above consumes. The timeline recipe
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below is untouched by them: it keeps driving one offset per letter, and these
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decide which letters fall, how far that offset carries them, and what colour
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they are.
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- text (string, default CASCADE): the word that cascades. Every character
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becomes one span, in source order, exactly like the hand-written markup;
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a space becomes a non-breaking space so it keeps its width in the flex
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row. Anything that is not a non-empty string keeps the shipped word.
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- distance (close | standard | far, default standard): multiplies the drop
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the timeline drives, so the letters cover a shorter or longer run in the
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same time. close covers half of it, standard leaves the shipped 42px
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alone, far carries them nearly double.
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- tone (ink | paper | accent, default ink): letter colour. ink is
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near-black for light frames, paper near-white for dark ones, accent
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rides --brand.
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On every default the result is identical to the original: the seven
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near-black letters of CASCADE dropping 42px into place.
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-->
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<div
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class="hf-remocn-top-down-letters"
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data-composition-variables='[
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{ "id": "text", "type": "string", "role": "content", "label": "Text", "description": "Word that cascades in. Every character becomes one letter span, in source order.", "default": "CASCADE" },
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{ "id": "distance", "type": "enum", "role": "motion", "label": "Distance", "description": "Multiplies the drop the timeline drives, so the letters cover a shorter or longer run in the same time.", "default": "standard", "options": [{ "value": "close", "label": "Close" }, { "value": "standard", "label": "Standard" }, { "value": "far", "label": "Far" }] },
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{ "id": "tone", "type": "enum", "role": "style", "label": "Tone", "description": "Letter colour: ink for light frames, paper for dark ones, accent rides --brand.", "default": "ink", "options": [{ "value": "ink", "label": "Ink" }, { "value": "paper", "label": "Paper" }, { "value": "accent", "label": "Accent" }] }
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]'
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>
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<span>C</span><span>A</span><span>S</span><span>C</span><span>A</span><span>D</span><span>E</span>
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</div>
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<style>
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.hf-remocn-top-down-letters {
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color: var(--hf-letters-color, #18181b);
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font-family: Inter, system-ui, sans-serif;
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font-weight: 900;
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letter-spacing: -0.04em;
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}
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.hf-remocn-top-down-letters {
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display: inline-flex;
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gap: 1px;
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font-size: 74px;
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line-height: 0.9;
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overflow: hidden;
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}
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.hf-remocn-top-down-letters span {
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display: inline-block;
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transform: translateY(calc(var(--hf-char-y, 0px) * var(--hf-char-distance, 1)));
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will-change: transform, opacity;
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}
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</style>
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<script>
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(function () {
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"use strict";
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var vars =
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window.__hyperframes && window.__hyperframes.getVariables
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? window.__hyperframes.getVariables()
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: {};
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// Unrecognised overrides return to their declared defaults.
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var distances = { close: 0.5, standard: 1, far: 1.8 };
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var tones = {
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ink: "#18181b",
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paper: "#fafafa",
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accent: "var(--brand, #34d399)",
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};
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function pick(table, value, fallback) {
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return Object.prototype.hasOwnProperty.call(table, value) ? value : fallback;
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}
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var distance = distances[pick(distances, vars.distance, "standard")];
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var tone = tones[pick(tones, vars.tone, "ink")];
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var text = typeof vars.text === "string" && vars.text !== "" ? vars.text : null;
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var roots = document.querySelectorAll(".hf-remocn-top-down-letters");
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for (var i = 0; i < roots.length; i += 1) {
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var root = roots[i];
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root.style.setProperty("--hf-char-distance", String(distance));
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root.style.setProperty("--hf-letters-color", tone);
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// Only rebuild when text was supplied; the shipped markup is already the
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// exact span-per-character output this branch produces for CASCADE.
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if (text !== null) {
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var characters = Array.from(text);
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root.textContent = "";
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for (var j = 0; j < characters.length; j += 1) {
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var span = document.createElement("span");
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span.textContent = characters[j] === " " ? "\u00a0" : characters[j];
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root.appendChild(span);
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}
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root.setAttribute("aria-label", text);
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}
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}
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})();
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</script>
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<!--
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Timeline integration:
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tl.fromTo('.hf-remocn-top-down-letters span', { opacity: 0, '--hf-char-y': '-42px' }, { opacity: 1, '--hf-char-y': '0px', duration: 0.22, stagger: 0.035, ease: 'power3.out' }, startTime);
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-->
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```
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</Accordion>
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## Usage
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Open `compositions/components/top-down-letters.html` and paste its contents into your composition. See the comment header in the file for detailed instructions.
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{/* hf:generated-footer */}
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Tagged `video-primitive` `motion-primitive` `remocn-port` `typography`.
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## Related topics
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- [Browse the complete Catalog](/catalog)
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- [Add assets and Catalog items in Studio](/studio/assets-and-blocks)
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- [Build a richer composition](/go-further)
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