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hyperframes/docs/catalog/components/caption-pill-karaoke.mdx
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Miguel Ángel d7688f9943 fix(docs): load the player from latest, not a pinned minor (#3320) 
* fix(docs): load the player from latest, not a pinned minor

The catalog pages pinned the player CDN URL to a minor line, and that pin
sat one line behind after the last release. Every page kept rendering, on
the older build, so nothing surfaced it: the only symptom was that a fix
published to npm never appeared on the docs.

The generator derived its pin from the player's package.json, which is
correct only if every page is regenerated on the release that moves it.
That is the step that did not happen, and it has to happen across 175
generated pages plus three hand-written files for the pin to be true.

A version carried in step across 178 places will be stale, and stale here
is silent. Ask for latest instead and there is nothing to carry.

This costs the ability to hold the docs back from a bad player release.
Paid deliberately: the pin did not buy that either, it only delayed the
good releases too.

A test asserts no pinned version comes back, and fails if it stops finding
the references at all, so it cannot pass by matching nothing.

* refactor(scripts): list tracked files instead of walking the tree

The pin guard hand-rolled a recursive directory walk with its own skip
list and size cap, which the audit flagged: helpers living in a test file
earn no coverage, so their complexity lands straight on the CRAP score.

git already knows which files to read, and ignores node_modules and build
output for us, so one call replaces the walker and both findings go away.
2026-08-17 21:11:12 -04:00

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---
title: "Pill Karaoke"
description: "Pill-shaped container with per-word karaoke color highlight"
---
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-pill-karaoke 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@latest/dist/hyperframes-player.global.js"><\/script></head><body><script>fetch("/public/catalog/components/caption-pill-karaoke.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-pill-karaoke.png");document.body.appendChild(p)});<\/script></body></html>`}
/>
## Install
<InstallCommand command="npx hyperframes add caption-pill-karaoke" item="caption-pill-karaoke" />
That writes one file: `compositions/components/caption-pill-karaoke.html`.
## Source
<Accordion title={`caption-pill-karaoke.html`}>
```html
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=1920, height=1080" />
<title>Pill Karaoke</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=Poppins:wght@700&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: "Poppins", Arial, sans-serif;
}
#pill-karaoke {
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: 1600px;
height: 220px;
display: flex;
align-items: center;
justify-content: center;
}
.caption-group {
position: absolute;
left: 0;
top: 0;
width: 1600px;
height: 220px;
display: flex;
align-items: center;
justify-content: center;
opacity: 0;
}
.caption-pill {
width: auto;
max-width: 1600px;
padding: 18px 60px 20px;
border-radius: 22px;
background: #e7e5e7;
box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
text-align: center;
overflow: visible;
}
.caption-copy {
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
width: 100%;
color: #a6a6a6;
font-family: "Poppins", Arial, sans-serif;
font-size: 72px;
font-weight: 700;
line-height: 1.16;
letter-spacing: 0;
white-space: nowrap;
word-break: normal;
overflow: visible;
}
.caption-line {
display: flex;
justify-content: center;
gap: 16px;
width: 100%;
max-width: none;
line-height: 1.16;
white-space: nowrap;
overflow: visible;
}
.caption-word {
display: inline-block;
color: #a6a6a6;
}
</style>
</head>
<body>
<div
id="pill-karaoke"
data-composition-id="caption-pill-karaoke"
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 PILL_MAX_WIDTH = 1400;
var PILL_MIN_PADDING_X = 30;
var PILL_MAX_PADDING_X = 60;
var FONT_WIDTH_SAFETY = 1.18;
var FONT_FAMILY = "Poppins";
var FONT_WEIGHT = "700";
var BASE_FONT_SIZE = 72;
var MIN_FONT_SIZE = 52;
var MAX_WORDS_PER_GROUP = 4;
var WORD_SPACING = 16;
var PAUSE_THRESHOLD = 0.1;
var GROUP_END_BUFFER = 0.3;
var COLOR_INACTIVE = "#A6A6A6";
var COLOR_ACTIVE = "#1C1E1D";
var COLOR_FADE_DURATION = 0.1;
var WORD_FADE_LEAD = 0.05;
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 },
];
function normalizeWords(rawWords) {
return rawWords
.map(function (item) {
var text = String(item.word || item.text || "").trim();
return {
text: 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 (w) {
return w.text.length > 0;
});
}
var measureCanvas = document.createElement("canvas");
var measureContext = measureCanvas.getContext("2d");
function measureWordWidth(text, fontSize) {
measureContext.font = FONT_WEIGHT + " " + fontSize + "px " + FONT_FAMILY;
return measureContext.measureText(text).width * FONT_WIDTH_SAFETY;
}
function measureLineWidth(words, fontSize) {
return words.reduce(function (total, word, index) {
return (
total + measureWordWidth(word.text.toLowerCase(), fontSize) + (index ? WORD_SPACING : 0)
);
}, 0);
}
function splitLinesForGroup(words, fontSize) {
var maxLineWidth = PILL_MAX_WIDTH - PILL_MIN_PADDING_X * 2;
if (
words.some(function (w) {
return measureWordWidth(w.text.toLowerCase(), fontSize) > maxLineWidth;
})
) {
return null;
}
if (measureLineWidth(words, fontSize) <= maxLineWidth) return [words];
var bestSplit = null;
var bestImbalance = Infinity;
for (var split = 1; split < words.length; split++) {
var firstLine = words.slice(0, split);
var secondLine = words.slice(split);
var firstWidth = measureLineWidth(firstLine, fontSize);
var secondWidth = measureLineWidth(secondLine, fontSize);
if (firstWidth <= maxLineWidth && secondWidth <= maxLineWidth) {
var imbalance = Math.abs(firstWidth - secondWidth);
if (imbalance < bestImbalance) {
bestSplit = [firstLine, secondLine];
bestImbalance = imbalance;
}
}
}
return bestSplit;
}
function fitsInTwoLinesAtSize(words, fontSize) {
return splitLinesForGroup(words, fontSize) !== null;
}
function planPillLayout(words, fontSize) {
var lines = splitLinesForGroup(words, fontSize) || [words];
var widestLine = lines.reduce(function (max, lineWords) {
return Math.max(max, measureLineWidth(lineWords, fontSize));
}, 0);
var availablePadding = Math.floor((PILL_MAX_WIDTH - widestLine) / 2);
var padX = Math.max(PILL_MIN_PADDING_X, Math.min(PILL_MAX_PADDING_X, availablePadding));
var pillWidth = Math.min(PILL_MAX_WIDTH, Math.ceil(widestLine + padX * 2));
return { lines: lines, padX: padX, pillWidth: pillWidth };
}
function makeGroups(words) {
var groups = [];
var current = [];
words.forEach(function (word, index) {
var testGroup = current.concat([word]);
var nextWord = words[index + 1];
var wouldExceedMaxWords = testGroup.length > MAX_WORDS_PER_GROUP;
var wouldExceedTwoLines = !fitsInTwoLinesAtSize(testGroup, BASE_FONT_SIZE);
if (wouldExceedMaxWords || wouldExceedTwoLines) {
if (current.length) {
groups.push({
words: current.slice(),
start: current[0].start,
end: current[current.length - 1].end,
});
}
current = [word];
return;
}
current.push(word);
var hasPunctuation = /[,.:!?]$/.test(word.text);
var pauseDuration = nextWord ? nextWord.start - word.end : 0;
var hasNaturalPause = pauseDuration >= PAUSE_THRESHOLD;
var maxWordsReached = current.length >= MAX_WORDS_PER_GROUP;
if (maxWordsReached || !nextWord || hasPunctuation || hasNaturalPause) {
groups.push({
words: current.slice(),
start: current[0].start,
end: current[current.length - 1].end,
});
current = [];
}
});
if (current.length)
groups.push({
words: current.slice(),
start: current[0].start,
end: current[current.length - 1].end,
});
return groups;
}
function fontSizeForGroup(words) {
var size = BASE_FONT_SIZE;
while (size > MIN_FONT_SIZE && !fitsInTwoLinesAtSize(words, size)) {
size -= 2;
}
return size;
}
function buildCaptions(groups) {
var stage = document.getElementById("caption-stage");
groups.forEach(function (group, groupIndex) {
var groupEl = document.createElement("div");
var pillEl = document.createElement("div");
var copyEl = document.createElement("div");
var fontSize = fontSizeForGroup(group.words);
groupEl.id = "caption-group-" + groupIndex;
groupEl.className = "caption-group";
pillEl.className = "caption-pill";
copyEl.className = "caption-copy";
copyEl.style.fontSize = fontSize + "px";
var indexedWords = group.words.map(function (word, wordIndex) {
return { text: word.text, start: word.start, end: word.end, wordIndex: wordIndex };
});
var layout = planPillLayout(indexedWords, fontSize);
pillEl.style.width = layout.pillWidth + "px";
pillEl.style.paddingLeft = layout.padX + "px";
pillEl.style.paddingRight = layout.padX + "px";
layout.lines.slice(0, 2).forEach(function (lineWords) {
var lineEl = document.createElement("div");
lineEl.className = "caption-line";
lineWords.forEach(function (word) {
var wordEl = document.createElement("span");
wordEl.id = "caption-word-" + groupIndex + "-" + word.wordIndex;
wordEl.className = "caption-word";
wordEl.textContent = word.text.toLowerCase();
lineEl.appendChild(wordEl);
});
copyEl.appendChild(lineEl);
});
pillEl.appendChild(copyEl);
groupEl.appendChild(pillEl);
stage.appendChild(groupEl);
});
}
var WORDS = normalizeWords(TRANSCRIPT);
var GROUPS = makeGroups(WORDS);
buildCaptions(GROUPS);
window.__timelines = window.__timelines || {};
var tl = gsap.timeline({ paused: true });
GROUPS.forEach(function (group, groupIndex) {
var groupEl = document.getElementById("caption-group-" + groupIndex);
var nextGroup = GROUPS[groupIndex + 1];
var isLastGroup = groupIndex === GROUPS.length - 1;
var effectiveEnd = isLastGroup
? DURATION
: Math.min(nextGroup.start, group.end + GROUP_END_BUFFER);
var visibleStart = Math.max(0, group.start);
var visibleEnd = Math.max(visibleStart + 0.01, effectiveEnd);
tl.set(groupEl, { opacity: 1 }, visibleStart);
tl.set(groupEl, { opacity: 0 }, visibleEnd);
group.words.forEach(function (word, wordIndex) {
var wordEl = document.getElementById("caption-word-" + groupIndex + "-" + wordIndex);
var isFirstWord = wordIndex === 0;
var wordStart = Math.max(visibleStart, word.start - WORD_FADE_LEAD);
tl.set(wordEl, { color: isFirstWord ? COLOR_ACTIVE : COLOR_INACTIVE }, visibleStart);
if (isFirstWord) return;
tl.to(
wordEl,
{ color: COLOR_ACTIVE, duration: COLOR_FADE_DURATION, ease: "none" },
wordStart,
);
});
});
window.__timelines["caption-pill-karaoke"] = tl;
</script>
</body>
</html>
```
</Accordion>
## Usage
Open `compositions/components/caption-pill-karaoke.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` `karaoke` `pill`.
## 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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