> ## Documentation Index
> Fetch the complete documentation index at: https://hyperframes.heygen.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Morph Swap

> 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.

export const InstallCommand = ({command}) => {
  const [copied, setCopied] = React.useState(false);
  const copy = async () => {
    try {
      if (navigator.clipboard && window.isSecureContext) {
        await navigator.clipboard.writeText(command);
      } else {
        const previous = document.activeElement;
        const scratch = document.createElement("textarea");
        scratch.value = command;
        scratch.setAttribute("readonly", "");
        scratch.style.position = "fixed";
        scratch.style.opacity = "0";
        document.body.appendChild(scratch);
        scratch.select();
        document.execCommand("copy");
        document.body.removeChild(scratch);
        previous?.focus?.();
      }
      setCopied(true);
      setTimeout(() => setCopied(false), 2000);
    } catch {}
  };
  return <div className="hf-install-command not-prose my-4 flex items-stretch overflow-hidden rounded-xl border border-zinc-200 bg-zinc-50 dark:border-zinc-800 dark:bg-zinc-900">
      <code className="flex-1 overflow-x-auto whitespace-nowrap border-r border-zinc-200 px-4 py-3 font-mono text-sm text-zinc-800 dark:border-zinc-800 dark:text-zinc-100">
        {command}
      </code>
      <button type="button" onClick={copy} data-copied={copied ? "true" : "false"} aria-label={`Copy ${command} to the clipboard`} className="hf-install-copy">
        <svg className="hf-install-copy-clipboard" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 18 18" fill="none" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
          <path d="M14.25 5.25H7.25C6.14543 5.25 5.25 6.14543 5.25 7.25V14.25C5.25 15.3546 6.14543 16.25 7.25 16.25H14.25C15.3546 16.25 16.25 15.3546 16.25 14.25V7.25C16.25 6.14543 15.3546 5.25 14.25 5.25Z" />
          <path d="M2.80103 11.998L1.77203 5.07397C1.61003 3.98097 2.36403 2.96397 3.45603 2.80197L10.38 1.77297C11.313 1.63397 12.19 2.16297 12.528 3.00097" />
        </svg>
        <svg className="hf-install-copy-check" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 18 18" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
          <path d="M2.75 9.5L6.5 13.25L15.25 4.5" />
        </svg>
      </button>
      <span className="hf-install-copy-status" role="status" aria-live="polite">
        {copied ? "Copied" : ""}
      </span>
    </div>;
};

<iframe className="w-full aspect-video rounded-xl border-0 bg-zinc-100 dark:bg-zinc-800" title="morph-swap 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/morph-swap.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/morph-swap.png");document.body.appendChild(p)});<\/script></body></html>`} />

## Install

<InstallCommand command="npx hyperframes add morph-swap" />

That writes one file: `compositions/components/morph-swap.html`.

## 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 theme={null}
<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 theme={null}
  <!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>

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)


## Related topics

- [Morph Text](/catalog/components/morph-text.md)
- [Menu Morph](/catalog/components/menu-morph.md)
- [Modal Morph](/catalog/components/modal-morph.md)
