Files
hyperframes/docs/catalog/components/morph-swap.mdx
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

849 lines
34 KiB
Plaintext

---
title: "Morph Swap"
description: "Two slotted siblings stacked at one shared center: A holds, then condenses or reshapes into B on a shared 50% 50% transform origin. Condense shrink-fades A exactly as B scales up; reshape morphs the silhouette on scaleX/scaleY, never width or height tweens. Token card defaults render when a slot is left empty."
---
import { InstallCommand } from "/snippets/install-command.jsx";
import { VariablesExplorer } from "/snippets/variables-explorer.jsx";
## Install
<InstallCommand command="npx hyperframes add morph-swap" item="morph-swap" />
That writes one file: `compositions/components/morph-swap.html`.
<VariablesExplorer
previewSrc="/public/catalog/components/morph-swap.json"
compositionId="morph-swap"
compositionSrc="compositions/components/morph-swap.html"
variables={[{"id":"swap_at","type":"number","role":"timing","label":"Swap start","description":"Seconds after mount start when the morph begins.","default":1.4,"min":0.1,"max":8,"step":0.05,"unit":"s"},{"id":"register","type":"enum","role":"style","label":"Register","description":"Morph mechanic: condense shrink-fades A into B at center; reshape morphs the silhouette on scaleX/scaleY.","default":"condense","options":[{"value":"condense","label":"Condense"},{"value":"reshape","label":"Reshape"}]},{"id":"accent","type":"enum","role":"style","label":"Accent","description":"Incoming card accent color.","default":"green","options":[{"value":"green","label":"Green"},{"value":"blue","label":"Blue"},{"value":"violet","label":"Violet"}]},{"id":"exit","type":"enum","role":"timing","label":"Exit","description":"Outgoing transition. None holds the final frame.","default":"none","options":[{"value":"none","label":"None"},{"value":"fade","label":"Fade"},{"value":"up","label":"Up"}]}]}
>
```html morph-swap.html
<!doctype html>
<!--
morph-swap: HyperFrames video primitive (transitions / holdable / bridge)
Concept: two slotted siblings sit absolutely stacked at one shared center.
A holds alone, then at swap_at it hands the stage to B through one of two
registers, both riding a shared transform-origin of 50% 50%:
- condense: A shrink-fades toward center exactly as B scales up through
the same silhouette (the flagship close morph: outgoing power2.in,
incoming back.out with a 0.15s overlap).
- reshape: A morphs its silhouette on scaleX/scaleY while fading, and B
picks up from that mid-morph silhouette and relaxes to its natural
shape (the flagship problem morph). NEVER width/height tweens; the
reshape rides transforms only, so it stays layout-free and seek-safe.
Slots (see README.md for a worked example):
- [data-slot="a"]: the outgoing content. Replace the children of this
element in your installed copy. Default: a muted token wireframe card.
- [data-slot="b"]: the incoming content. Same mechanism. Default: a
taller brand-tinted token card so the swap reads at a glance.
Variables (declared in data-composition-variables below):
- swap_at (number, seconds, default 1.4): when the morph starts, relative
to mount start. Clamped so the swap always completes inside IN.
- register (condense | reshape, default condense): the morph mechanic.
- accent (green | blue | violet, default green): incoming card accent.
green maps to --brand, blue to --accent, violet to --accent-2.
- exit (none | fade | up, default none): outgoing transition. none holds
the final frame (frame roots own transitions; holds end films).
Envelope (fixed IN/OUT, elastic HOLD only, never gsap.timeScale()):
IN = swap_at + swap span (0.75s condense, 1.05s reshape); the stage
settles in during the first 0.32s
HOLD = elastic = max(0, D - (IN + OUT)); B holds dead-still
OUT = 0.50s when exit is fade or up, 0 when exit is none
If D < IN + OUT, IN and OUT scale down together so IN + OUT == D.
Sync point: morph-land at swap_at + span inside IN (2.15s at defaults). It
never moves into elastic HOLD.
Sound cue: dispatches a bubbling `hf:sfx` CustomEvent with id
"morph-land-soft" at morph-land. This primitive never plays audio.
Mount contract: MOUNTABLE SUB-COMPOSITION. The runtime clones only
<template> contents; #root fills the host box (inset:0, container-type:
size), has no data-width/data-height, and registers one paused timeline
under the literal "morph-swap" key (mount flattening strips
data-composition-id from the live root). Variables come from
window.__hyperframes.getVariables().
-->
<html
lang="en"
data-composition-id="morph-swap"
data-composition-duration="3.5"
data-composition-variables='[
{ "id": "swap_at", "type": "number", "role": "timing", "label": "Swap start", "description": "Seconds after mount start when the morph begins.", "default": 1.4, "min": 0.1, "max": 8, "step": 0.05, "unit": "s" },
{ "id": "register", "type": "enum", "role": "style", "label": "Register", "description": "Morph mechanic: condense shrink-fades A into B at center; reshape morphs the silhouette on scaleX/scaleY.", "default": "condense", "options": [{ "value": "condense", "label": "Condense" }, { "value": "reshape", "label": "Reshape" }] },
{ "id": "accent", "type": "enum", "role": "style", "label": "Accent", "description": "Incoming card accent color.", "default": "green", "options": [{ "value": "green", "label": "Green" }, { "value": "blue", "label": "Blue" }, { "value": "violet", "label": "Violet" }] },
{ "id": "exit", "type": "enum", "role": "timing", "label": "Exit", "description": "Outgoing transition. None holds the final frame.", "default": "none", "options": [{ "value": "none", "label": "None" }, { "value": "fade", "label": "Fade" }, { "value": "up", "label": "Up" }] }
]'
>
<head>
<meta charset="UTF-8" />
<title>Morph Swap</title>
</head>
<body>
<template>
<div id="root" data-composition-id="morph-swap" data-duration="3.5" data-fps="30">
<style>
*,
*::before,
*::after {
box-sizing: border-box;
}
/* Root fills the host-owned box. Internal measurements use cqw/cqh
and every painted color comes from a contract token. */
#root {
position: absolute;
inset: 0;
container-type: size;
isolation: isolate;
overflow: hidden;
background: var(--bg, #07111f);
color: var(--fg, #f8fafc);
font-family: var(--font-body, Inter, system-ui, sans-serif);
}
.msw-clip,
.msw-stage {
position: absolute;
inset: 0;
width: 100%;
height: 100%;
}
.msw-clip {
overflow: hidden;
}
.msw-stage {
opacity: 0;
}
/* Both panels stack full-bleed and center their content, so the two
siblings share one center and one transform origin. All morph
motion is transforms on the panel; slot content never reflows. */
.msw-panel {
position: absolute;
inset: 0;
display: grid;
place-items: center;
transform-origin: 50% 50%;
}
/* Caller-supplied media keeps a sane footprint at center. */
.msw-slot > img,
.msw-slot > video {
max-width: 84cqw;
max-height: 84cqh;
border-radius: var(--radius, 2.4cqmin);
}
.msw-slot {
display: grid;
place-items: center;
}
/* Token-styled default slot content: a muted wireframe card on the
outgoing side, a taller brand-tinted card on the incoming side.
Callers replacing slot children never see any of this. */
.msw-card {
display: flex;
flex-direction: column;
justify-content: center;
padding: var(--space-3, 4cqh) var(--space-3, 4cqw);
border: 0.16cqw solid var(--border, #334155);
border-radius: var(--radius, 2.4cqmin);
background: color-mix(in srgb, var(--surface, #172033) 88%, var(--bg, #07111f));
box-shadow: 0 2cqh 5cqw color-mix(in srgb, var(--bg, #07111f) 45%, transparent);
}
.msw-a .msw-card {
width: 52cqw;
height: 46cqh;
}
.msw-b .msw-card {
width: 36cqw;
height: 62cqh;
border-color: color-mix(
in srgb,
var(--msw-accent, #22c55e) 52%,
var(--border, #334155)
);
background: color-mix(in srgb, var(--surface, #172033) 86%, var(--msw-accent, #22c55e));
}
.msw-bar {
width: 34%;
height: 4.4cqh;
margin-bottom: var(--space-3, 4cqh);
border-radius: 1.2cqh;
background: var(--muted, #94a3b8);
opacity: 0.5;
}
.msw-b .msw-bar {
width: 46%;
background: var(--msw-accent, #22c55e);
opacity: 0.92;
}
.msw-line {
height: 2.4cqh;
margin-bottom: var(--space-2, 2.6cqh);
border-radius: 1.2cqh;
background: var(--muted, #94a3b8);
opacity: 0.4;
}
.msw-line:nth-of-type(2) {
width: 92%;
}
.msw-line:nth-of-type(3) {
width: 68%;
}
.msw-line:nth-of-type(4) {
width: 44%;
}
.msw-b .msw-line {
background: color-mix(in srgb, var(--msw-accent, #22c55e) 70%, var(--fg, #f8fafc));
opacity: 0.7;
}
</style>
<div
id="morph-swap-clip"
class="msw-clip clip"
data-start="0"
data-duration="3.5"
data-track-index="0"
>
<div class="msw-stage">
<section class="msw-panel msw-a" aria-label="Outgoing panel">
<div class="msw-slot" data-slot="a">
<!-- SLOT "a": replace the children of this element with your
own outgoing content (img, video, or HTML). -->
<div class="msw-card" aria-hidden="true">
<div class="msw-bar"></div>
<div class="msw-line"></div>
<div class="msw-line"></div>
<div class="msw-line"></div>
</div>
</div>
</section>
<section class="msw-panel msw-b" aria-label="Incoming panel">
<div class="msw-slot" data-slot="b">
<!-- SLOT "b": replace the children of this element with your
own incoming content (img, video, or HTML). -->
<div class="msw-card" aria-hidden="true">
<div class="msw-bar"></div>
<div class="msw-line"></div>
<div class="msw-line"></div>
<div class="msw-line"></div>
</div>
</div>
</section>
</div>
</div>
<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
<script>
(function () {
"use strict";
var root = document.getElementById("root");
// Literal id: mount flattening strips data-composition-id from the
// live root before this timeline registers.
var compositionId = "morph-swap";
var stage = root.querySelector(".msw-stage");
var panelA = root.querySelector(".msw-a");
var panelB = root.querySelector(".msw-b");
var vars =
window.__hyperframes && window.__hyperframes.getVariables
? window.__hyperframes.getVariables()
: {};
var rawSwapAt = vars.swap_at == null ? 1.4 : Number(vars.swap_at);
// INVARIANT: swap_at always clamps into the declared 0.1-8 range.
var swapAt = Number.isFinite(rawSwapAt) ? Math.max(0.1, Math.min(8, rawSwapAt)) : 1.4;
// INVARIANT: only condense | reshape reaches the timeline.
var register = vars.register === "reshape" ? "reshape" : "condense";
// Each enum choice routes to a DIFFERENT contract token so the
// variable stays meaningful under a theme.
var accentColors = {
green: "var(--brand, #22c55e)",
blue: "var(--accent, #38bdf8)",
violet: "var(--accent-2, #c5a3ff)",
};
var accent = Object.prototype.hasOwnProperty.call(accentColors, vars.accent)
? vars.accent
: "green";
// INVARIANT: only none | fade | up reaches the timeline.
var exit = vars.exit === "fade" || vars.exit === "up" ? vars.exit : "none";
root.style.setProperty("--msw-accent", accentColors[accent]);
// RETIME RANGE: fixed IN and OUT scale together only when D is too
// short. HOLD is the sole elastic phase. Never use timeScale().
var STAGE_IN_BASE = 0.32;
var SPAN_BASE = register === "condense" ? 0.75 : 1.05;
var IN_BASE = swapAt + SPAN_BASE;
var OUT_BASE = exit === "none" ? 0 : 0.5;
var duration = Math.max(0.001, parseFloat(root.dataset.duration || "3.5"));
var totalBase = IN_BASE + OUT_BASE;
var scale = duration < totalBase ? duration / totalBase : 1;
var IN = IN_BASE * scale;
var OUT = OUT_BASE * scale;
var STAGE_IN = Math.min(STAGE_IN_BASE * scale, IN);
var SWAP = swapAt * scale;
var SWAP_END = IN;
var HOLD = Math.max(0, duration - (IN + OUT));
var OUT_START = IN + HOLD;
function fireSfx(id, t) {
root.dispatchEvent(
new CustomEvent("hf:sfx", { detail: { id: id, t: t }, bubbles: true }),
);
}
// Explicit both-endpoints state makes tl.seek(0) deterministic:
// A fully present, B parked hidden at its pre-morph shape.
gsap.set(stage, { opacity: 0, y: 0 });
gsap.set(panelA, { scale: 1, scaleX: 1, scaleY: 1, autoAlpha: 1 });
gsap.set(panelB, { scale: 1, scaleX: 1, scaleY: 1, autoAlpha: 0 });
var tl = gsap.timeline({ paused: true });
// IN part 1: the stage settles and A holds alone.
tl.to(stage, { opacity: 1, duration: STAGE_IN, ease: "power2.out" }, 0);
// IN part 2: the morph, both registers on the shared 50% 50% origin.
if (register === "condense") {
// A condenses toward center as B scales up through the same
// silhouette, 0.15s overlap (flagship close morph).
tl.to(
panelA,
{ scale: 0.72, autoAlpha: 0, duration: 0.35 * scale, ease: "power2.in" },
SWAP,
);
tl.fromTo(
panelB,
{ scale: 0.72, autoAlpha: 0 },
{
scale: 1,
autoAlpha: 1,
duration: 0.55 * scale,
ease: "back.out(1.6)",
immediateRender: false,
},
SWAP + 0.2 * scale,
);
} else {
// A reshapes its silhouette on scaleX/scaleY (NEVER width or
// height tweens) while fading; B picks up from the same
// mid-morph silhouette and relaxes to its natural shape.
tl.to(
panelA,
{ scaleX: 0.68, scaleY: 1.34, duration: 0.6 * scale, ease: "power2.inOut" },
SWAP,
);
tl.to(
panelA,
{ autoAlpha: 0, duration: 0.45 * scale, ease: "power1.in" },
SWAP + 0.15 * scale,
);
tl.fromTo(
panelB,
{ scaleX: 0.68, scaleY: 1.34, autoAlpha: 0 },
{
scaleX: 1,
scaleY: 1,
autoAlpha: 1,
duration: 0.65 * scale,
ease: "power2.out",
immediateRender: false,
},
SWAP + 0.4 * scale,
);
}
tl.call(
function () {
fireSfx("morph-land-soft", SWAP_END);
},
[],
SWAP_END,
);
// HOLD: B dead-still at its natural shape.
// OUT: only when the exit variable asks for one; exit none holds
// the final frame (frame roots own transitions).
if (exit !== "none") {
tl.to(stage, { opacity: 0, duration: OUT, ease: "power2.in" }, OUT_START);
if (exit === "up") {
tl.to(stage, { y: "-6cqh", duration: OUT, ease: "power2.in" }, OUT_START);
}
}
tl.seek(0);
window.__timelines = window.__timelines || {};
window.__timelines[compositionId] = tl;
})();
</script>
</div>
</template>
</body>
</html>
```
</VariablesExplorer>
## Paste it into your composition
Open `compositions/components/morph-swap.html` and copy what is inside into your own composition.
A component has no size or duration of its own. It takes both from the composition
you paste it into.
## Variables
Every one of these has a default, so the piece works untouched. Set the ones you
want to change on the element:
| Variable | Default | Accepts | What it does |
| --- | --- | --- | --- |
| `swap_at` | `1.4` | 0.1s to 8s, step 0.05s | Seconds after mount start when the morph begins. |
| `register` | `condense` | `condense`, `reshape` | Morph mechanic: condense shrink-fades A into B at center; reshape morphs the silhouette on scaleX/scaleY. |
| `accent` | `green` | `green`, `blue`, `violet` | Incoming card accent color. |
| `exit` | `none` | `none`, `fade`, `up` | Outgoing transition. None holds the final frame. |
Set them with `data-variable-values` on the element that mounts it. These are the
defaults, so this behaves exactly like the preview above until you change one:
```html wrap
<div
data-composition-id="morph-swap"
data-composition-src="compositions/components/morph-swap.html"
data-variable-values='{"swap_at":1.4,"register":"condense","accent":"green","exit":"none"}'
></div>
```
## Source
<Accordion title="morph-swap.html">
```html
<!doctype html>
<!--
morph-swap: HyperFrames video primitive (transitions / holdable / bridge)
Concept: two slotted siblings sit absolutely stacked at one shared center.
A holds alone, then at swap_at it hands the stage to B through one of two
registers, both riding a shared transform-origin of 50% 50%:
- condense: A shrink-fades toward center exactly as B scales up through
the same silhouette (the flagship close morph: outgoing power2.in,
incoming back.out with a 0.15s overlap).
- reshape: A morphs its silhouette on scaleX/scaleY while fading, and B
picks up from that mid-morph silhouette and relaxes to its natural
shape (the flagship problem morph). NEVER width/height tweens; the
reshape rides transforms only, so it stays layout-free and seek-safe.
Slots (see README.md for a worked example):
- [data-slot="a"]: the outgoing content. Replace the children of this
element in your installed copy. Default: a muted token wireframe card.
- [data-slot="b"]: the incoming content. Same mechanism. Default: a
taller brand-tinted token card so the swap reads at a glance.
Variables (declared in data-composition-variables below):
- swap_at (number, seconds, default 1.4): when the morph starts, relative
to mount start. Clamped so the swap always completes inside IN.
- register (condense | reshape, default condense): the morph mechanic.
- accent (green | blue | violet, default green): incoming card accent.
green maps to --brand, blue to --accent, violet to --accent-2.
- exit (none | fade | up, default none): outgoing transition. none holds
the final frame (frame roots own transitions; holds end films).
Envelope (fixed IN/OUT, elastic HOLD only, never gsap.timeScale()):
IN = swap_at + swap span (0.75s condense, 1.05s reshape); the stage
settles in during the first 0.32s
HOLD = elastic = max(0, D - (IN + OUT)); B holds dead-still
OUT = 0.50s when exit is fade or up, 0 when exit is none
If D < IN + OUT, IN and OUT scale down together so IN + OUT == D.
Sync point: morph-land at swap_at + span inside IN (2.15s at defaults). It
never moves into elastic HOLD.
Sound cue: dispatches a bubbling `hf:sfx` CustomEvent with id
"morph-land-soft" at morph-land. This primitive never plays audio.
Mount contract: MOUNTABLE SUB-COMPOSITION. The runtime clones only
<template> contents; #root fills the host box (inset:0, container-type:
size), has no data-width/data-height, and registers one paused timeline
under the literal "morph-swap" key (mount flattening strips
data-composition-id from the live root). Variables come from
window.__hyperframes.getVariables().
-->
<html
lang="en"
data-composition-id="morph-swap"
data-composition-duration="3.5"
data-composition-variables='[
{ "id": "swap_at", "type": "number", "role": "timing", "label": "Swap start", "description": "Seconds after mount start when the morph begins.", "default": 1.4, "min": 0.1, "max": 8, "step": 0.05, "unit": "s" },
{ "id": "register", "type": "enum", "role": "style", "label": "Register", "description": "Morph mechanic: condense shrink-fades A into B at center; reshape morphs the silhouette on scaleX/scaleY.", "default": "condense", "options": [{ "value": "condense", "label": "Condense" }, { "value": "reshape", "label": "Reshape" }] },
{ "id": "accent", "type": "enum", "role": "style", "label": "Accent", "description": "Incoming card accent color.", "default": "green", "options": [{ "value": "green", "label": "Green" }, { "value": "blue", "label": "Blue" }, { "value": "violet", "label": "Violet" }] },
{ "id": "exit", "type": "enum", "role": "timing", "label": "Exit", "description": "Outgoing transition. None holds the final frame.", "default": "none", "options": [{ "value": "none", "label": "None" }, { "value": "fade", "label": "Fade" }, { "value": "up", "label": "Up" }] }
]'
>
<head>
<meta charset="UTF-8" />
<title>Morph Swap</title>
</head>
<body>
<template>
<div id="root" data-composition-id="morph-swap" data-duration="3.5" data-fps="30">
<style>
*,
*::before,
*::after {
box-sizing: border-box;
}
/* Root fills the host-owned box. Internal measurements use cqw/cqh
and every painted color comes from a contract token. */
#root {
position: absolute;
inset: 0;
container-type: size;
isolation: isolate;
overflow: hidden;
background: var(--bg, #07111f);
color: var(--fg, #f8fafc);
font-family: var(--font-body, Inter, system-ui, sans-serif);
}
.msw-clip,
.msw-stage {
position: absolute;
inset: 0;
width: 100%;
height: 100%;
}
.msw-clip {
overflow: hidden;
}
.msw-stage {
opacity: 0;
}
/* Both panels stack full-bleed and center their content, so the two
siblings share one center and one transform origin. All morph
motion is transforms on the panel; slot content never reflows. */
.msw-panel {
position: absolute;
inset: 0;
display: grid;
place-items: center;
transform-origin: 50% 50%;
}
/* Caller-supplied media keeps a sane footprint at center. */
.msw-slot > img,
.msw-slot > video {
max-width: 84cqw;
max-height: 84cqh;
border-radius: var(--radius, 2.4cqmin);
}
.msw-slot {
display: grid;
place-items: center;
}
/* Token-styled default slot content: a muted wireframe card on the
outgoing side, a taller brand-tinted card on the incoming side.
Callers replacing slot children never see any of this. */
.msw-card {
display: flex;
flex-direction: column;
justify-content: center;
padding: var(--space-3, 4cqh) var(--space-3, 4cqw);
border: 0.16cqw solid var(--border, #334155);
border-radius: var(--radius, 2.4cqmin);
background: color-mix(in srgb, var(--surface, #172033) 88%, var(--bg, #07111f));
box-shadow: 0 2cqh 5cqw color-mix(in srgb, var(--bg, #07111f) 45%, transparent);
}
.msw-a .msw-card {
width: 52cqw;
height: 46cqh;
}
.msw-b .msw-card {
width: 36cqw;
height: 62cqh;
border-color: color-mix(
in srgb,
var(--msw-accent, #22c55e) 52%,
var(--border, #334155)
);
background: color-mix(in srgb, var(--surface, #172033) 86%, var(--msw-accent, #22c55e));
}
.msw-bar {
width: 34%;
height: 4.4cqh;
margin-bottom: var(--space-3, 4cqh);
border-radius: 1.2cqh;
background: var(--muted, #94a3b8);
opacity: 0.5;
}
.msw-b .msw-bar {
width: 46%;
background: var(--msw-accent, #22c55e);
opacity: 0.92;
}
.msw-line {
height: 2.4cqh;
margin-bottom: var(--space-2, 2.6cqh);
border-radius: 1.2cqh;
background: var(--muted, #94a3b8);
opacity: 0.4;
}
.msw-line:nth-of-type(2) {
width: 92%;
}
.msw-line:nth-of-type(3) {
width: 68%;
}
.msw-line:nth-of-type(4) {
width: 44%;
}
.msw-b .msw-line {
background: color-mix(in srgb, var(--msw-accent, #22c55e) 70%, var(--fg, #f8fafc));
opacity: 0.7;
}
</style>
<div
id="morph-swap-clip"
class="msw-clip clip"
data-start="0"
data-duration="3.5"
data-track-index="0"
>
<div class="msw-stage">
<section class="msw-panel msw-a" aria-label="Outgoing panel">
<div class="msw-slot" data-slot="a">
<!-- SLOT "a": replace the children of this element with your
own outgoing content (img, video, or HTML). -->
<div class="msw-card" aria-hidden="true">
<div class="msw-bar"></div>
<div class="msw-line"></div>
<div class="msw-line"></div>
<div class="msw-line"></div>
</div>
</div>
</section>
<section class="msw-panel msw-b" aria-label="Incoming panel">
<div class="msw-slot" data-slot="b">
<!-- SLOT "b": replace the children of this element with your
own incoming content (img, video, or HTML). -->
<div class="msw-card" aria-hidden="true">
<div class="msw-bar"></div>
<div class="msw-line"></div>
<div class="msw-line"></div>
<div class="msw-line"></div>
</div>
</div>
</section>
</div>
</div>
<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
<script>
(function () {
"use strict";
var root = document.getElementById("root");
// Literal id: mount flattening strips data-composition-id from the
// live root before this timeline registers.
var compositionId = "morph-swap";
var stage = root.querySelector(".msw-stage");
var panelA = root.querySelector(".msw-a");
var panelB = root.querySelector(".msw-b");
var vars =
window.__hyperframes && window.__hyperframes.getVariables
? window.__hyperframes.getVariables()
: {};
var rawSwapAt = vars.swap_at == null ? 1.4 : Number(vars.swap_at);
// INVARIANT: swap_at always clamps into the declared 0.1-8 range.
var swapAt = Number.isFinite(rawSwapAt) ? Math.max(0.1, Math.min(8, rawSwapAt)) : 1.4;
// INVARIANT: only condense | reshape reaches the timeline.
var register = vars.register === "reshape" ? "reshape" : "condense";
// Each enum choice routes to a DIFFERENT contract token so the
// variable stays meaningful under a theme.
var accentColors = {
green: "var(--brand, #22c55e)",
blue: "var(--accent, #38bdf8)",
violet: "var(--accent-2, #c5a3ff)",
};
var accent = Object.prototype.hasOwnProperty.call(accentColors, vars.accent)
? vars.accent
: "green";
// INVARIANT: only none | fade | up reaches the timeline.
var exit = vars.exit === "fade" || vars.exit === "up" ? vars.exit : "none";
root.style.setProperty("--msw-accent", accentColors[accent]);
// RETIME RANGE: fixed IN and OUT scale together only when D is too
// short. HOLD is the sole elastic phase. Never use timeScale().
var STAGE_IN_BASE = 0.32;
var SPAN_BASE = register === "condense" ? 0.75 : 1.05;
var IN_BASE = swapAt + SPAN_BASE;
var OUT_BASE = exit === "none" ? 0 : 0.5;
var duration = Math.max(0.001, parseFloat(root.dataset.duration || "3.5"));
var totalBase = IN_BASE + OUT_BASE;
var scale = duration < totalBase ? duration / totalBase : 1;
var IN = IN_BASE * scale;
var OUT = OUT_BASE * scale;
var STAGE_IN = Math.min(STAGE_IN_BASE * scale, IN);
var SWAP = swapAt * scale;
var SWAP_END = IN;
var HOLD = Math.max(0, duration - (IN + OUT));
var OUT_START = IN + HOLD;
function fireSfx(id, t) {
root.dispatchEvent(
new CustomEvent("hf:sfx", { detail: { id: id, t: t }, bubbles: true }),
);
}
// Explicit both-endpoints state makes tl.seek(0) deterministic:
// A fully present, B parked hidden at its pre-morph shape.
gsap.set(stage, { opacity: 0, y: 0 });
gsap.set(panelA, { scale: 1, scaleX: 1, scaleY: 1, autoAlpha: 1 });
gsap.set(panelB, { scale: 1, scaleX: 1, scaleY: 1, autoAlpha: 0 });
var tl = gsap.timeline({ paused: true });
// IN part 1: the stage settles and A holds alone.
tl.to(stage, { opacity: 1, duration: STAGE_IN, ease: "power2.out" }, 0);
// IN part 2: the morph, both registers on the shared 50% 50% origin.
if (register === "condense") {
// A condenses toward center as B scales up through the same
// silhouette, 0.15s overlap (flagship close morph).
tl.to(
panelA,
{ scale: 0.72, autoAlpha: 0, duration: 0.35 * scale, ease: "power2.in" },
SWAP,
);
tl.fromTo(
panelB,
{ scale: 0.72, autoAlpha: 0 },
{
scale: 1,
autoAlpha: 1,
duration: 0.55 * scale,
ease: "back.out(1.6)",
immediateRender: false,
},
SWAP + 0.2 * scale,
);
} else {
// A reshapes its silhouette on scaleX/scaleY (NEVER width or
// height tweens) while fading; B picks up from the same
// mid-morph silhouette and relaxes to its natural shape.
tl.to(
panelA,
{ scaleX: 0.68, scaleY: 1.34, duration: 0.6 * scale, ease: "power2.inOut" },
SWAP,
);
tl.to(
panelA,
{ autoAlpha: 0, duration: 0.45 * scale, ease: "power1.in" },
SWAP + 0.15 * scale,
);
tl.fromTo(
panelB,
{ scaleX: 0.68, scaleY: 1.34, autoAlpha: 0 },
{
scaleX: 1,
scaleY: 1,
autoAlpha: 1,
duration: 0.65 * scale,
ease: "power2.out",
immediateRender: false,
},
SWAP + 0.4 * scale,
);
}
tl.call(
function () {
fireSfx("morph-land-soft", SWAP_END);
},
[],
SWAP_END,
);
// HOLD: B dead-still at its natural shape.
// OUT: only when the exit variable asks for one; exit none holds
// the final frame (frame roots own transitions).
if (exit !== "none") {
tl.to(stage, { opacity: 0, duration: OUT, ease: "power2.in" }, OUT_START);
if (exit === "up") {
tl.to(stage, { y: "-6cqh", duration: OUT, ease: "power2.in" }, OUT_START);
}
}
tl.seek(0);
window.__timelines = window.__timelines || {};
window.__timelines[compositionId] = tl;
})();
</script>
</div>
</template>
</body>
</html>
```
</Accordion>
{/* hf:generated-footer */}
Tagged `transition` `morph` `swap` `condense` `reshape` `holdable` `slots`.
## Related topics
- [Browse the complete Catalog](/catalog)
- [Add assets and Catalog items in Studio](/studio/assets-and-blocks)
- [Build a richer composition](/go-further)