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hyperframes/docs/catalog/components/caption-particle-burst.mdx
T
Miguel Ángel 9734578e60 feat(registry): bring back the video-primitive moves (#3169) 
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the same unpublished .html path, so it would have shown an empty frame.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.
2026-08-10 18:46:03 -04:00

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---
title: "Particle Burst"
description: "Keyword words trigger colored particle explosions"
---
import { InstallCommand } from "/snippets/install-command.jsx";
<iframe
className="w-full aspect-video rounded-xl border-0 bg-zinc-100 dark:bg-zinc-800"
title="caption-particle-burst preview"
loading="lazy"
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/caption-particle-burst.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/caption-particle-burst.png");document.body.appendChild(p)});<\/script></body></html>`}
/>
## Install
<InstallCommand command="npx hyperframes add caption-particle-burst" />
That writes one file: `compositions/components/caption-particle-burst.html`.
## Source
<Accordion title={`caption-particle-burst.html`}>
```html
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=1920, height=1080" />
<title>Particle Burst</title>
<link rel="preconnect" href="https://fonts.googleapis.com" />
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
<link
href="https://fonts.googleapis.com/css2?family=Outfit:wght@900&display=swap"
rel="stylesheet"
/>
<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
<style>
*,
*::before,
*::after {
box-sizing: border-box;
}
html,
body {
width: 1920px;
height: 1080px;
margin: 0;
overflow: hidden;
background: transparent;
}
#particle-burst {
pointer-events: none;
position: relative;
width: 1920px;
height: 1080px;
overflow: hidden;
background: transparent;
}
.bs-overlay {
position: absolute;
inset: 0;
background: transparent;
z-index: 1;
pointer-events: none;
}
#bs-container {
position: absolute;
inset: 0;
z-index: 10;
pointer-events: none;
}
.bs-group {
position: absolute;
bottom: 120px;
left: 0;
width: 100%;
display: flex;
flex-wrap: wrap;
align-items: flex-end;
justify-content: center;
gap: 24px;
padding: 0 100px;
opacity: 0;
visibility: hidden;
}
.bs-word {
font-family: "Outfit", sans-serif;
font-weight: 900;
font-size: 88px;
text-transform: uppercase;
color: rgba(255, 255, 255, 0.45);
display: inline-block;
letter-spacing: 0.05em;
line-height: 1;
}
.bs-particle {
position: absolute;
width: 10px;
height: 10px;
border-radius: 50%;
opacity: 0;
pointer-events: none;
z-index: 20;
left: 960px;
bottom: 180px;
}
</style>
</head>
<body>
<div
id="particle-burst"
data-composition-id="caption-particle-burst"
data-timeline-locked
data-start="0"
data-duration="8"
data-fps="30"
data-width="1920"
data-height="1080"
>
<div class="bs-overlay"></div>
<div id="bs-container"></div>
</div>
<script>
(function () {
window.__timelines = window.__timelines || {};
var _fitCanvas = document.createElement("canvas");
var _fitCtx = _fitCanvas.getContext("2d");
function fitFontSize(text, baseFontSize, fontWeight, fontFamily, maxWidth) {
var size = baseFontSize;
var minSize = Math.floor(baseFontSize * 0.45);
while (size > minSize) {
_fitCtx.font = fontWeight + " " + size + "px " + fontFamily;
if (_fitCtx.measureText(text).width <= maxWidth) return size;
size -= 2;
}
return minSize;
}
function mulberry32(seed) {
return function () {
seed |= 0;
seed = (seed + 0x6d2b79f5) | 0;
var t = Math.imul(seed ^ (seed >>> 15), 1 | seed);
t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t;
return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
};
}
var WORDS = [
{ text: "Every", start: 0.0, end: 0.3 },
{ text: "great", start: 0.3, end: 0.55 },
{ text: "video", start: 0.55, end: 0.85 },
{ text: "starts", start: 0.85, end: 1.1 },
{ text: "with", start: 1.1, end: 1.25 },
{ text: "a", start: 1.25, end: 1.35 },
{ text: "single", start: 1.35, end: 1.65 },
{ text: "frame.", start: 1.65, end: 2.0 },
{ text: "HyperFrames", start: 2.1, end: 2.65 },
{ text: "lets", start: 2.65, end: 2.85 },
{ text: "you", start: 2.85, end: 2.95 },
{ text: "write", start: 2.95, end: 3.15 },
{ text: "HTML", start: 3.15, end: 3.55 },
{ text: "and", start: 3.55, end: 3.65 },
{ text: "render", start: 3.65, end: 3.95 },
{ text: "professional", start: 3.95, end: 4.45 },
{ text: "video.", start: 4.45, end: 4.8 },
{ text: "No", start: 4.9, end: 5.05 },
{ text: "timeline.", start: 5.05, end: 5.45 },
{ text: "No", start: 5.5, end: 5.65 },
{ text: "drag", start: 5.65, end: 5.85 },
{ text: "and", start: 5.85, end: 5.95 },
{ text: "drop.", start: 5.95, end: 6.25 },
{ text: "Just", start: 6.35, end: 6.55 },
{ text: "code", start: 6.55, end: 6.8 },
{ text: "that", start: 6.8, end: 6.95 },
{ text: "becomes", start: 6.95, end: 7.3 },
{ text: "cinema.", start: 7.3, end: 7.7 },
];
// Keywords get particle burst + gold color
var KEYWORDS = new Set([8, 12, 15, 24, 27]); // HyperFrames, HTML, professional, code, cinema.
var RAW_GROUPS = [
[0, 3],
[4, 7],
[8, 8],
[9, 12],
[13, 15],
[16, 16],
[17, 19],
[20, 22],
[23, 24],
[25, 27],
];
var GROUPS = RAW_GROUPS.map(function (pair, gi) {
var ws = pair[0],
we = pair[1];
var nextStart = gi + 1 < RAW_GROUPS.length ? WORDS[RAW_GROUPS[gi + 1][0]].start : 8.0;
var gEnd = Math.min(WORDS[we].end + 0.35, nextStart - 0.05);
return { wordStart: ws, wordEnd: we, start: WORDS[ws].start, end: gEnd };
});
var PARTICLE_COLORS = [
"#FFD700",
"#FF6B35",
"#FF3C78",
"#9B5DE5",
"#00BBF9",
"#00F5D4",
"#ffffff",
"#F15BB5",
];
var NUM_PARTICLES = 10;
var container = document.getElementById("bs-container");
var tl = gsap.timeline({ paused: true });
GROUPS.forEach(function (g, gi) {
var groupWords = WORDS.slice(g.wordStart, g.wordEnd + 1);
var groupText = groupWords
.map(function (w) {
return w.text.toUpperCase();
})
.join(" ");
var fontSize = fitFontSize(groupText, 88, "900", "'Outfit', sans-serif", 1720);
var grp = document.createElement("div");
grp.className = "bs-group";
grp.id = "bs-grp-" + gi;
groupWords.forEach(function (w, i) {
var wi = g.wordStart + i;
var span = document.createElement("span");
span.className = "bs-word";
span.id = "bs-w-" + wi;
span.textContent = w.text.toUpperCase();
span.style.fontSize = fontSize + "px";
grp.appendChild(span);
});
container.appendChild(grp);
});
// Create particles for keyword words
var particleData = {};
WORDS.forEach(function (w, wi) {
if (!KEYWORDS.has(wi)) return;
var rng = mulberry32(wi * 137 + 99);
particleData[wi] = [];
for (var p = 0; p < NUM_PARTICLES; p++) {
var angle = (p / NUM_PARTICLES) * Math.PI * 2 + rng() * 0.6;
var dist = 120 + rng() * 200;
var sz = 4 + rng() * 8;
var dx = Math.cos(angle) * dist;
var dy = -Math.sin(angle) * dist;
var dot = document.createElement("div");
dot.className = "bs-particle";
dot.id = "bs-p-" + wi + "-" + p;
dot.style.backgroundColor = PARTICLE_COLORS[p % PARTICLE_COLORS.length];
dot.style.width = sz.toFixed(1) + "px";
dot.style.height = sz.toFixed(1) + "px";
container.appendChild(dot);
particleData[wi].push({ el: dot, dx: dx, dy: dy });
}
});
GROUPS.forEach(function (g, gi) {
var grp = document.getElementById("bs-grp-" + gi);
var groupWords = WORDS.slice(g.wordStart, g.wordEnd + 1);
tl.set(grp, { visibility: "visible" }, g.start);
tl.fromTo(
grp,
{ opacity: 0, scale: 0.92 },
{ opacity: 1, scale: 1, duration: 0.2, ease: "back.out(1.5)" },
g.start,
);
groupWords.forEach(function (w, i) {
var wi = g.wordStart + i;
var wordEl = document.getElementById("bs-w-" + wi);
var isKW = KEYWORDS.has(wi);
tl.to(
wordEl,
{ color: isKW ? "#FFD700" : "#ffffff", scale: isKW ? 1.12 : 1.05, duration: 0.08 },
w.start,
);
tl.to(wordEl, { color: "rgba(255,255,255,0.4)", scale: 1.0, duration: 0.1 }, w.end);
if (isKW && particleData[wi]) {
particleData[wi].forEach(function (pd, pi) {
tl.set(pd.el, { x: 0, y: 0, opacity: 0 }, w.start);
tl.to(
pd.el,
{ x: pd.dx, y: pd.dy, opacity: 1, duration: 0.12, ease: "power3.out" },
w.start + pi * 0.018,
);
tl.to(
pd.el,
{ opacity: 0, duration: 0.45, ease: "power1.in" },
w.start + 0.12 + pi * 0.018,
);
tl.set(pd.el, { opacity: 0, x: 0, y: 0 }, w.start + 0.7);
});
}
});
tl.to(grp, { opacity: 0, duration: 0.14, ease: "power2.in" }, g.end - 0.14);
tl.set(grp, { opacity: 0, visibility: "hidden" }, g.end);
});
tl.seek(0);
window.__timelines["caption-particle-burst"] = tl;
})();
</script>
</body>
</html>
```
</Accordion>
## Usage
Open `compositions/components/caption-particle-burst.html` and paste its contents into your composition. See the comment header in the file for detailed instructions.
{/* hf:generated-footer */}
Tagged `captions` `caption-style` `particles` `burst` `effects`.
## Related topics
- [Browse the complete Catalog](/catalog)
- [Add assets and Catalog items in Studio](/studio/assets-and-blocks)
- [Build a richer composition](/go-further)
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