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9734578e6065d6dec8993c4e30a978263c3eaa8b
hyperframes/docs/catalog/components/caption-neon-accent.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the same unpublished .html path, so it would have shown an empty frame.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: "Neon Accent"
description: "Multi-color neon glow accents with wiggle drift animation"
---
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-neon-accent 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-neon-accent.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-neon-accent.png");document.body.appendChild(p)});<\/script></body></html>`}
/>
## Install
<InstallCommand command="npx hyperframes add caption-neon-accent" />
That writes one file: `compositions/components/caption-neon-accent.html`.
## Source
<Accordion title={`caption-neon-accent.html`}>
```html
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=1920, height=1080" />
<title>Neon Accent</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=Montserrat:wght@800&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;
font-family: "Montserrat", Arial, sans-serif;
}
#neon-accent {
pointer-events: none;
position: relative;
width: 1920px;
height: 1080px;
overflow: hidden;
background: transparent;
}
.caption-layer {
position: absolute;
inset: 0;
z-index: 20;
pointer-events: none;
transform: translateZ(0);
}
.safe-zone {
position: absolute;
bottom: 100px;
left: 50%;
transform: translateX(-50%);
width: 1400px;
height: 260px;
display: flex;
align-items: center;
justify-content: center;
}
.caption-group {
position: absolute;
left: 0;
top: 0;
width: 1400px;
height: 260px;
display: flex;
align-items: center;
justify-content: center;
opacity: 0;
transform-origin: 50% 50%;
will-change: transform;
backface-visibility: hidden;
}
.caption-copy {
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
max-width: 1400px;
text-align: center;
}
.caption-line {
display: flex;
align-items: center;
justify-content: center;
gap: 16px;
width: max-content;
max-width: 1400px;
line-height: 1.1;
white-space: nowrap;
}
.caption-word {
display: inline-block;
color: #ffffff;
font-family: "Montserrat", Arial, sans-serif;
font-weight: 800;
font-size: 88px;
line-height: 1.1;
letter-spacing: 0;
text-transform: uppercase;
}
.caption-word.accent {
font-size: 106px;
}
</style>
</head>
<body>
<div
id="neon-accent"
data-composition-id="caption-neon-accent"
data-timeline-locked
data-start="0"
data-duration="8"
data-fps="30"
data-width="1920"
data-height="1080"
>
<div class="caption-layer" aria-hidden="true">
<div id="caption-stage" class="safe-zone"></div>
</div>
</div>
<script>
var DURATION = 8;
var SAFE_ZONE_WIDTH = 1400;
var BASE_FONT_SIZE = 88;
var ACCENT_FONT_SIZE = 106;
var MIN_FONT_SIZE = 62;
var MAX_WORDS_PER_GROUP = 4;
var WORD_SPACING = 16;
var PAUSE_THRESHOLD = 0.1;
var ENTRY_DURATION = 7 / 30;
var WIGGLE_DISTANCE = 14;
var WIGGLE_CYCLE = 2 / 1.3;
var FONT_WIDTH_SAFETY = 1.14;
var PRIMARY_COLOR = "#FFFFFF";
var ACCENT_COLORS = ["#53FF01", "#FF0002", "#FCFF00"];
var TRANSITION_WORDS = new Set([
"the",
"a",
"an",
"and",
"or",
"but",
"is",
"are",
"was",
"were",
"to",
"of",
"in",
"on",
"at",
"for",
"with",
"by",
"from",
"as",
"it",
"its",
"this",
"that",
"these",
"those",
"be",
"been",
"have",
"has",
"had",
"do",
"does",
"did",
"will",
"would",
"could",
"should",
"may",
"might",
"must",
"can",
"if",
"then",
"so",
"just",
"not",
"no",
"yes",
"up",
"out",
"about",
"lets",
"you",
"write",
"render",
]);
var KEYWORDS = new Set(["hyperframes", "html", "professional", "code", "cinema"]);
var TRANSCRIPT = [
{ 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 },
];
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;
}
gsap.registerPlugin && gsap.registerPlugin();
function cleanText(text) {
return String(text || "").trim();
}
function normalizeWords(rawWords) {
return rawWords
.map(function (item) {
return {
text: cleanText(item.word || item.text),
start: Math.max(0, Number(item.start) || 0),
end: Math.min(DURATION, Math.max(Number(item.start) || 0, Number(item.end) || 0)),
};
})
.filter(function (word) {
return word.text.length > 0;
});
}
var measureCanvas = document.createElement("canvas");
var measureContext = measureCanvas.getContext("2d");
function seededRandom(seed) {
var x = Math.sin(seed * 9999) * 10000;
return x - Math.floor(x);
}
function isKeyword(text) {
return KEYWORDS.has(text.toLowerCase().replace(/[^a-z]/g, ""));
}
function assignWordColors(words, groupIndex) {
return words.map(function (word) {
if (isKeyword(word.text)) {
var colorIndex = Math.floor(seededRandom(groupIndex * 23 + 7) * ACCENT_COLORS.length);
return ACCENT_COLORS[colorIndex];
}
var clean = word.text.toLowerCase().replace(/[^a-z']/g, "");
if (TRANSITION_WORDS.has(clean)) return PRIMARY_COLOR;
var rand = seededRandom(groupIndex * 7 + words.indexOf(word));
if (rand > 0.6) {
var ci = Math.floor(rand * ACCENT_COLORS.length) % ACCENT_COLORS.length;
return ACCENT_COLORS[ci];
}
return PRIMARY_COLOR;
});
}
function measureWord(word, color, fontSize) {
var size = color === PRIMARY_COLOR ? fontSize : fontSize * 1.2;
measureContext.font = "800 " + size + "px Montserrat";
return measureContext.measureText(word.text.toUpperCase()).width * FONT_WIDTH_SAFETY;
}
function measureLineWidth(words, colors, fontSize) {
return words.reduce(function (total, word, index) {
return (
total +
measureWord(word, colors[index] || PRIMARY_COLOR, fontSize) +
(index ? WORD_SPACING : 0)
);
}, 0);
}
function splitLinesForGroup(words, colors, fontSize) {
var maxLineWidth = SAFE_ZONE_WIDTH;
if (
words.some(function (word, i) {
return measureWord(word, colors[i] || PRIMARY_COLOR, fontSize) > maxLineWidth;
})
)
return null;
if (measureLineWidth(words, colors, fontSize) <= maxLineWidth)
return [{ words: words, colors: colors }];
var best = null;
var bestDiff = Infinity;
for (var split = 1; split < words.length; split++) {
var fw = words.slice(0, split),
sw = words.slice(split);
var fc = colors.slice(0, split),
sc = colors.slice(split);
var fW = measureLineWidth(fw, fc, fontSize);
var sW = measureLineWidth(sw, sc, fontSize);
if (fW <= maxLineWidth && sW <= maxLineWidth) {
var diff = Math.abs(fW - sW);
if (diff < bestDiff) {
best = [
{ words: fw, colors: fc },
{ words: sw, colors: sc },
];
bestDiff = diff;
}
}
}
return best;
}
function makeGroups(words) {
var groups = [];
var current = [];
words.forEach(function (word, index) {
var nextWord = words[index + 1];
var testGroup = current.concat([word]);
var exceedsWords = testGroup.length > MAX_WORDS_PER_GROUP;
var colors = assignWordColors(testGroup, groups.length);
var exceedsFit = !splitLinesForGroup(testGroup, colors, BASE_FONT_SIZE);
if (exceedsWords || exceedsFit) {
if (current.length) groups.push(makeGroup(current, groups.length));
current = [word];
return;
}
current.push(word);
var punctuation = /[,.:!?]$/.test(word.text);
var pause = nextWord ? nextWord.start - word.end : 0;
if (
!nextWord ||
punctuation ||
pause >= PAUSE_THRESHOLD ||
current.length >= MAX_WORDS_PER_GROUP
) {
groups.push(makeGroup(current, groups.length));
current = [];
}
});
if (current.length) groups.push(makeGroup(current, groups.length));
return groups;
}
function makeGroup(words, groupIndex) {
var colors = assignWordColors(words, groupIndex);
var groupText = words
.map(function (w) {
return w.text.toUpperCase();
})
.join(" ");
var fontSize = fitFontSize(groupText, BASE_FONT_SIZE, "800", "Montserrat", SAFE_ZONE_WIDTH);
while (fontSize > MIN_FONT_SIZE && !splitLinesForGroup(words, colors, fontSize)) {
fontSize -= 2;
}
return {
words: words.slice(),
colors: colors,
fontSize: fontSize,
lines: splitLinesForGroup(words, colors, fontSize) || [{ words: words, colors: colors }],
start: words[0].start,
end: words[words.length - 1].end,
};
}
function shadowForColor(color) {
var hex = color.replace("#", "");
var r = parseInt(hex.slice(0, 2), 16);
var g = parseInt(hex.slice(2, 4), 16);
var b = parseInt(hex.slice(4, 6), 16);
var glow =
"0 0 4px rgba(" +
r +
"," +
g +
"," +
b +
",1), 0 0 10px rgba(" +
r +
"," +
g +
"," +
b +
",0.9), 0 0 20px rgba(" +
r +
"," +
g +
"," +
b +
",0.7), 0 0 40px rgba(" +
r +
"," +
g +
"," +
b +
",0.4)";
return "0 8px 16px rgba(0,0,0,0.8), 0 16px 40px rgba(0,0,0,0.6), " + glow;
}
function buildCaptions(groups) {
var stage = document.getElementById("caption-stage");
groups.forEach(function (group, groupIndex) {
var groupEl = document.createElement("div");
var copyEl = document.createElement("div");
groupEl.id = "caption-group-" + groupIndex;
groupEl.className = "caption-group";
copyEl.className = "caption-copy";
group.lines.slice(0, 2).forEach(function (line) {
var lineEl = document.createElement("div");
lineEl.className = "caption-line";
line.words.forEach(function (word, wordIndex) {
var color = line.colors[wordIndex] || PRIMARY_COLOR;
var wordEl = document.createElement("span");
wordEl.className = color === PRIMARY_COLOR ? "caption-word" : "caption-word accent";
wordEl.textContent = word.text.toUpperCase();
wordEl.style.color = color;
wordEl.style.fontSize =
color === PRIMARY_COLOR ? group.fontSize + "px" : group.fontSize * 1.2 + "px";
wordEl.style.textShadow = shadowForColor(color);
lineEl.appendChild(wordEl);
});
copyEl.appendChild(lineEl);
});
groupEl.appendChild(copyEl);
stage.appendChild(groupEl);
});
}
var WORDS = normalizeWords(TRANSCRIPT);
var GROUPS = makeGroups(WORDS);
buildCaptions(GROUPS);
window.__timelines = window.__timelines || {};
var tl = gsap.timeline({ paused: true });
var visibleStarts = GROUPS.map(function (group, groupIndex) {
var prev = GROUPS[groupIndex - 1];
var availableGap = prev ? Math.max(0, group.start - prev.end) : ENTRY_DURATION;
var entryLead = Math.min(ENTRY_DURATION, availableGap);
return Math.max(0, group.start - entryLead);
});
var allGroupEls = GROUPS.map(function (_, i) {
return document.getElementById("caption-group-" + i);
});
GROUPS.forEach(function (group, groupIndex) {
var groupEl = allGroupEls[groupIndex];
var visibleStart = visibleStarts[groupIndex];
var visibleEnd = groupIndex < GROUPS.length - 1 ? visibleStarts[groupIndex + 1] : DURATION;
var direction = groupIndex % 2 === 0 ? -1 : 1;
var D = WIGGLE_DISTANCE * direction;
var wiggleCycles = Math.max(1, Math.ceil((visibleEnd - visibleStart) / WIGGLE_CYCLE));
allGroupEls.forEach(function (otherEl, otherIndex) {
if (otherIndex !== groupIndex) tl.set(otherEl, { opacity: 0 }, visibleStart);
});
tl.set(groupEl, { opacity: 0, scale: 0.65, x: 0, y: 0 }, visibleStart);
tl.to(
groupEl,
{ opacity: 1, scale: 1, duration: ENTRY_DURATION, ease: "power3.out", force3D: true },
visibleStart,
);
tl.to(
groupEl,
{
x: D,
y: D,
duration: WIGGLE_CYCLE / 2,
ease: "sine.inOut",
yoyo: true,
repeat: Math.max(0, wiggleCycles * 2 - 1),
force3D: true,
},
visibleStart,
);
tl.set(groupEl, { opacity: 0 }, visibleEnd);
});
window.__timelines["caption-neon-accent"] = tl;
</script>
</body>
</html>
```
</Accordion>
## Usage
Open `compositions/components/caption-neon-accent.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` `neon` `glow` `accent`.
## 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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