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hyperframes/docs/catalog/blocks/glitch.mdx
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miga-heygenandMiguel Ángel 7b5fdb1ad2 fix(docs): emit catalog source accordion titles as plain strings (#4006) 
The generated catalog pages rendered the "Source" accordion title as a
JSX expression, `<Accordion title={`name.html`}>`. Mintlify's search
indexer stringifies expression attribute nodes rather than evaluating
them, so every one of the 399 catalog pages surfaced its Source section
in search results as "[object Object]" (visible on the Scroll Feed page,
among others).

The template literal carried no escaping benefit: every title is a
single-segment `name.html` path, and a double-quoted JSX string handles
it directly. Introduce `mdxStringAttribute`, which emits a plain
`name="value"` attribute and escapes `& " < { }` as HTML character
references (MDX decodes references inside quoted attribute values, and
unlike JSON.stringify it does not rely on backslash escapes, which JSX
strings do not honour). Use it for both the Source accordion title and
the preview iframe title, and regenerate the catalog pages.

Regenerated with `npx tsx scripts/generate-catalog-pages.ts`; the only
change across the 399 pages is the one Accordion title line each.

Co-authored-by: Miguel Ángel <miguel.sierra@heygen.com>
2026-09-16 11:55:00 -04:00

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---
title: "Glitch"
description: "Shader transition with digital glitch artifacts"
---
import { InstallCommand } from "/snippets/install-command.jsx";
## Install
<InstallCommand command="npx hyperframes add glitch" item="glitch" />
That writes one file: `compositions/glitch.html`.
<iframe
className="w-full aspect-video rounded-xl border-0 bg-zinc-100 dark:bg-zinc-800"
title="glitch 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/blocks/glitch.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/blocks/glitch.png");document.body.appendChild(p)});<\/script></body></html>`}
/>
## Source
<Accordion title="glitch.html">
```html
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
<style>
@import url("https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=Bebas+Neue&family=JetBrains+Mono:wght@400;700&family=Lato:wght@400;700&display=block");
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
html,
body {
width: 1920px;
height: 1080px;
overflow: hidden;
}
</style>
</head>
<body>
<div
id="root"
data-composition-id="main"
data-start="0"
data-duration="4"
data-width="1920"
data-height="1080"
>
<style>
[data-composition-id="main"] {
width: 1920px;
height: 1080px;
overflow: hidden;
position: relative;
background: #293241;
}
/* Blueprint grid */
.bp-grid {
position: absolute;
inset: 0;
background-image:
linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
background-size: 40px 40px;
pointer-events: none;
}
/* Layout */
.bp-left {
position: absolute;
left: 0;
top: 0;
bottom: 0;
width: 1200px;
display: flex;
align-items: center;
justify-content: center;
}
.bp-right {
position: absolute;
right: 0;
top: 0;
bottom: 0;
width: 720px;
display: flex;
flex-direction: column;
justify-content: center;
padding: 60px 60px 60px 40px;
}
.bp-divider {
position: absolute;
left: 1200px;
top: 60px;
bottom: 60px;
width: 1px;
background: #ee6c4d;
opacity: 0.15;
}
.bp-number {
font-family: "Space Mono", monospace;
font-size: 14px;
font-weight: 700;
letter-spacing: 0.4em;
text-transform: uppercase;
position: absolute;
top: 40px;
left: 60px;
color: #ee6c4d;
}
/* Right panel typography */
.bp-name {
font-family: "Bebas Neue", sans-serif;
font-size: 38px;
letter-spacing: 0.08em;
margin-bottom: 20px;
color: #ee6c4d;
}
.bp-plabel {
font-family: "Space Mono", monospace;
font-size: 11px;
font-weight: 700;
letter-spacing: 0.3em;
text-transform: uppercase;
margin-bottom: 10px;
color: #ee6c4d;
opacity: 0.5;
}
.bp-prompt {
font-family: "JetBrains Mono", monospace;
font-size: 20px;
line-height: 1.6;
padding: 16px 20px;
border-radius: 6px;
margin-bottom: 20px;
color: #ee6c4d;
background: rgba(238, 108, 77, 0.06);
border: 1px solid rgba(238, 108, 77, 0.12);
}
.bp-desc {
font-family: "Lato", sans-serif;
font-size: 17px;
line-height: 1.6;
color: #98c1d9;
opacity: 0.55;
}
/* GL scenes (hidden, just for texture capture) */
.scene {
position: absolute;
top: 0;
left: 0;
width: 1200px;
height: 1080px;
overflow: hidden;
display: flex;
align-items: center;
justify-content: center;
}
.scene-label {
font-family: "Bebas Neue", sans-serif;
font-size: 140px;
letter-spacing: 0.06em;
opacity: 0.12;
}
</style>
<div class="bp-grid"></div>
<div class="bp-divider"></div>
<div class="bp-number">09 / 14</div>
<!-- GL demo scenes (captured as textures, then hidden) -->
<div id="s1" class="scene" style="background: #293241">
<div class="scene-label" style="color: #ee6c4d">SCENE A</div>
</div>
<div id="s2" class="scene" style="background: #ee6c4d; opacity: 0">
<div class="scene-label" style="color: #293241">SCENE B</div>
</div>
<!-- GL canvas (left panel only) -->
<canvas
id="gl-canvas"
width="1200"
height="1080"
style="
position: absolute;
top: 0;
left: 0;
width: 1200px;
height: 1080px;
z-index: 10;
pointer-events: none;
display: none;
"
>
</canvas>
<!-- Right panel metadata -->
<div class="bp-right">
<div class="bp-name">Glitch</div>
<div class="bp-plabel">Prompt</div>
<div class="bp-prompt">"use glitch shader transition"</div>
<div class="bp-desc">
Scan lines, block scramble, chromatic aberration, brightness flicker, and color
posterization.
</div>
</div>
<div
id="driver"
class="clip"
data-start="0"
data-duration="4"
data-track-index="0"
style="position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none"
></div>
</div>
<script>
window.__timelines = window.__timelines || {};
var glCanvas = document.getElementById("gl-canvas");
var gl = glCanvas.getContext("webgl", { preserveDrawingBuffer: true });
if (!gl) {
console.warn("WebGL not available");
window.__timelines["main"] = gsap.timeline({ paused: true });
} else {
gl.viewport(0, 0, 1200, 1080);
gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, false);
var sceneTextures = {};
function captureScene(sceneId) {
var scene = document.getElementById(sceneId);
var origOpacity = scene.style.opacity;
var origZ = scene.style.zIndex;
scene.style.opacity = "1";
scene.style.zIndex = "999";
scene.offsetHeight;
var c = document.createElement("canvas");
c.width = 1200;
c.height = 1080;
var ctx = c.getContext("2d");
ctx.fillStyle = window.getComputedStyle(scene).backgroundColor;
ctx.fillRect(0, 0, 1200, 1080);
var sr = scene.getBoundingClientRect();
var els = scene.querySelectorAll("*");
for (var i = 0; i < els.length; i++) {
var el = els[i],
cs = window.getComputedStyle(el);
if (cs.display === "none" || cs.visibility === "hidden") continue;
var r = el.getBoundingClientRect();
if (r.width < 1 || r.height < 1) continue;
var x = r.left - sr.left,
y = r.top - sr.top,
w = r.width,
h = r.height;
ctx.save();
ctx.globalAlpha = parseFloat(cs.opacity) || 1;
var bg = cs.backgroundColor;
if (bg && bg !== "rgba(0, 0, 0, 0)" && bg !== "transparent") {
ctx.fillStyle = bg;
ctx.fillRect(x, y, w, h);
}
var hasChildEls = el.querySelector("div,span,img,video");
var text = "";
for (var j = 0; j < el.childNodes.length; j++)
if (el.childNodes[j].nodeType === 3) text += el.childNodes[j].textContent;
text = text.trim();
if (text && !hasChildEls) {
ctx.font = cs.fontWeight + " " + cs.fontSize + " " + cs.fontFamily;
ctx.fillStyle = cs.color;
if (cs.letterSpacing && cs.letterSpacing !== "normal")
ctx.letterSpacing = cs.letterSpacing;
ctx.textAlign = "center";
ctx.textBaseline = "middle";
ctx.fillText(text, x + w / 2, y + h / 2);
}
ctx.restore();
}
scene.style.opacity = origOpacity;
scene.style.zIndex = origZ;
var tex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, tex);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, c);
sceneTextures[sceneId] = tex;
}
var vertSrc =
"attribute vec2 a_pos; varying vec2 v_uv; void main(){" +
"v_uv=a_pos*0.5+0.5; v_uv.y=1.0-v_uv.y; gl_Position=vec4(a_pos,0,1);}";
var quadBuf = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, quadBuf);
gl.bufferData(
gl.ARRAY_BUFFER,
new Float32Array([-1, -1, 1, -1, -1, 1, 1, 1]),
gl.STATIC_DRAW,
);
function compileShader(src, type) {
var s = gl.createShader(type);
gl.shaderSource(s, src);
gl.compileShader(s);
if (!gl.getShaderParameter(s, gl.COMPILE_STATUS))
console.error("Shader:", gl.getShaderInfoLog(s));
return s;
}
function mkProg(fragSrc) {
var p = gl.createProgram();
gl.attachShader(p, compileShader(vertSrc, gl.VERTEX_SHADER));
gl.attachShader(p, compileShader(fragSrc, gl.FRAGMENT_SHADER));
gl.linkProgram(p);
if (!gl.getProgramParameter(p, gl.LINK_STATUS))
console.error("Link:", gl.getProgramInfoLog(p));
return p;
}
var H =
"precision mediump float;" +
"varying vec2 v_uv;" +
"uniform sampler2D u_from, u_to;" +
"uniform float u_progress;" +
"uniform vec2 u_resolution;\n";
var progPass = mkProg(H + "void main(){gl_FragColor=texture2D(u_from,v_uv);}");
var progTrans = mkProg(
H +
"float rand(vec2 co){return fract(sin(dot(co,vec2(12.9898,78.233)))*43758.5453);}void main(){float inten=u_progress*(1.-u_progress)*4.;float lineY=floor(v_uv.y*60.)/60.;float lineDisp=(rand(vec2(lineY,floor(u_progress*17.)))-.5)*.18*inten;vec2 block=floor(v_uv*vec2(12.,8.));float br=rand(block+vec2(floor(u_progress*11.)));float ba=step(.83,br)*inten;vec2 bd=(vec2(rand(block*2.1),rand(block*3.7))-.5)*.35*ba;vec2 uv=clamp(v_uv+vec2(lineDisp,0.)+bd,0.,1.);float shift=inten*.035;float r=texture2D(u_from,uv+vec2(shift,0.)).r;float g=texture2D(u_from,uv).g;float b=texture2D(u_from,uv-vec2(shift,0.)).b;vec3 col=vec3(r,g,b);col-=step(.5,fract(v_uv.y*u_resolution.y*.5))*.05*inten;col*=1.+(rand(vec2(floor(u_progress*23.)))-.5)*.3*inten;float levels=mix(256.,8.,inten*.5);col=floor(col*levels)/levels;gl_FragColor=mix(vec4(col,1.),texture2D(u_to,v_uv),u_progress);}",
);
function renderShader(prog, texFrom, texTo, progress) {
gl.useProgram(prog);
gl.activeTexture(gl.TEXTURE0);
gl.bindTexture(gl.TEXTURE_2D, texFrom);
gl.uniform1i(gl.getUniformLocation(prog, "u_from"), 0);
gl.activeTexture(gl.TEXTURE1);
gl.bindTexture(gl.TEXTURE_2D, texTo);
gl.uniform1i(gl.getUniformLocation(prog, "u_to"), 1);
gl.uniform1f(gl.getUniformLocation(prog, "u_progress"), progress);
gl.uniform2f(gl.getUniformLocation(prog, "u_resolution"), 1200, 1080);
var pos = gl.getAttribLocation(prog, "a_pos");
gl.bindBuffer(gl.ARRAY_BUFFER, quadBuf);
gl.enableVertexAttribArray(pos);
gl.vertexAttribPointer(pos, 2, gl.FLOAT, false, 0, 0);
gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
}
function easeInOut(p) {
return p < 0.5 ? 2 * p * p : 1 - Math.pow(-2 * p + 2, 2) / 2;
}
captureScene("s1");
captureScene("s2");
glCanvas.style.display = "block";
renderShader(progPass, sceneTextures["s1"], sceneTextures["s1"], 0);
document.querySelectorAll(".scene").forEach(function (s) {
s.style.opacity = "0";
});
var tl = gsap.timeline({
paused: true,
onUpdate: function () {
var t = tl.time();
if (t >= 1.0 && t < 3.0) {
renderShader(
progTrans,
sceneTextures["s1"],
sceneTextures["s2"],
easeInOut((t - 1.0) / 2.0),
);
} else if (t >= 3.0) {
renderShader(progPass, sceneTextures["s2"], sceneTextures["s2"], 0);
} else {
renderShader(progPass, sceneTextures["s1"], sceneTextures["s1"], 0);
}
},
});
tl.to({ v: 0 }, { v: 1, duration: 4, ease: "none" }, 0);
window.__timelines["main"] = tl;
} // end if (gl)
</script>
</body>
</html>
```
</Accordion>
## Usage
After installing, add the block to your host composition:
```html
<div data-composition-id="glitch" data-composition-src="compositions/glitch.html" data-start="0" data-duration="4" data-track-index="1" data-width="1920" data-height="1080"></div>
```
{/* hf:generated-footer */}
Tagged `transition` `shader`.
## 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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