> ## 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.

# Focus Swap

> Moves attention between two side-by-side cards as one recedes with scale, blur, and dimming while the other advances to full focus.

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="focus-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/focus-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/focus-swap.png");document.body.appendChild(p)});<\/script></body></html>`} />

## Install

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

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

## Paste it into your composition

Open `compositions/components/focus-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                                       |
| -------- | ------- | --------------------- | -------------------------------------------------- |
| `focus`  | `b`     | `a`, `b`              | Card that ends sharp, full-size, and fully opaque. |
| `blurPx` | `6`     | 0px to 20px, step 1px | Blur applied to the card outside the viewer focus. |
| `dim`    | `0.5`   | 0 to 1, step 0.05     | Opacity of the card outside the viewer focus.      |

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="focus-swap"
  data-composition-src="compositions/components/focus-swap.html"
  data-variable-values='{"focus":"b","blurPx":6,"dim":0.5}'
></div>
```

## Source

<Accordion title={`focus-swap.html`}>
  ```html theme={null}
  <!doctype html>
  <!--
    focus-swap: HyperFrames video primitive (ui-props / holdable / demonstrate)

    Concept: attention moves between two side-by-side cards. The card losing
    focus recedes to 0.92 scale, softens, and dims while the other card advances
    to full scale, sharpness, and opacity. Both sides move together as one clean
    swap.

    Compiled-from evidence: launches-motion-vocabulary.md section 3.6 identifies
    blur-focus / defocus in 14 of 18 production launches and names focus-swap as
    a high-frequency missing primitive for blur + opacity + optional scale.

    Use when: directing the viewer from one product state, option, or result to
    another without moving either element out of its established layout.

    Variables:
      - focus ("a" | "b", default "b"): the card that ends focused.
      - blurPx (number, default 6): blur applied to the unfocused card.
      - dim (number from 0 to 1, default 0.5): unfocused card opacity.

    Envelope (holdable):
      IN = 0.90s at the standard duration, including a 0.20s readable lead.
      HOLD = elastic and deliberately still after focus lands.
      OUT = none; the host composition owns the cut or exit.
      For durations under 0.90s, the lead and swap compress to finish by D.

    Sync point: focus-landed at 0.90s into IN at the standard duration. It
    compresses with IN only when D is shorter than 0.90s and never enters HOLD.

    Sound: none. This continuous attention shift has no discrete impact cue.

    Mount contract: this is a template-wrapped sub-composition. The runtime
    clones only template contents. #root has no data-width or data-height and
    fills the host-owned box with position:absolute, inset:0, and
    container-type:size. The paused GSAP timeline is registered under the
    hardcoded composition id "focus-swap".
  -->
  <html
    lang="en"
    data-composition-variables='[
      { "id": "focus", "type": "enum", "role": "motion", "label": "Final focus", "description": "Card that ends sharp, full-size, and fully opaque.", "default": "b", "options": [{ "value": "a", "label": "Card A" }, { "value": "b", "label": "Card B" }] },
      { "id": "blurPx", "type": "number", "role": "style", "label": "Unfocused blur", "description": "Blur applied to the card outside the viewer focus.", "default": 6, "min": 0, "max": 20, "step": 1, "unit": "px" },
      { "id": "dim", "type": "number", "role": "style", "label": "Unfocused opacity", "description": "Opacity of the card outside the viewer focus.", "default": 0.5, "min": 0, "max": 1, "step": 0.05 }
    ]'
  >
    <head>
      <meta charset="UTF-8" />
      <title>Focus Swap</title>
    </head>
    <body>
      <template>
        <div id="root" data-composition-id="focus-swap" data-duration="1.5" data-fps="30">
          <style>
            *,
            *::before,
            *::after {
              box-sizing: border-box;
            }

            #root {
              position: absolute;
              inset: 0;
              container-type: size;
              isolation: isolate;
              overflow: hidden;
              background: var(--bg);
              color: var(--fg);
              font-family: var(--font-body);
            }

            .fs-clip {
              width: 100%;
              height: 100%;
              display: grid;
              place-items: center;
              padding: 7cqh 6cqw;
            }

            .fs-pair {
              width: 100%;
              height: min(72cqh, 52cqw);
              display: grid;
              grid-template-columns: repeat(2, minmax(0, 1fr));
              gap: 4cqw;
              align-items: stretch;
            }

            /* EDIT ZONE: visual payload only. Keep the card frames and their
               initial states transform-free because GSAP owns scale and blur. */
            .fs-card {
              min-width: 0;
              position: relative;
              display: flex;
              flex-direction: column;
              justify-content: space-between;
              padding: 5cqh 3.2cqw;
              overflow: hidden;
              border: 0.16cqw solid var(--border);
              border-radius: var(--radius);
              background: var(--surface);
              box-shadow: 0 2.2cqh 5cqh color-mix(in srgb, var(--bg) 72%, transparent);
              transform-origin: center;
              will-change: transform, filter, opacity;
              /* Both cards are the same placeholder material. Which one holds
                 attention is said by blur, scale, and opacity, never by hue. */
              --fs-card-accent: color-mix(in srgb, var(--fg) 72%, var(--surface));
            }

            .fs-card::before {
              content: "";
              position: absolute;
              inset: 0 0 auto;
              height: 0.75cqh;
              background: var(--fs-card-accent);
            }

            .fs-card-head {
              display: flex;
              align-items: center;
              justify-content: space-between;
              gap: var(--space-2);
            }

            .fs-card-letter {
              display: grid;
              place-items: center;
              width: 5cqw;
              aspect-ratio: 1;
              border-radius: 50%;
              background: color-mix(in srgb, var(--fg) 13%, var(--surface));
              color: var(--fg);
              font-family: var(--font-mono);
              font-size: 2.3cqw;
              font-weight: 700;
            }

            .fs-status {
              color: var(--muted);
              font-family: var(--font-mono);
              font-size: 1.25cqw;
              letter-spacing: 0.12em;
              text-transform: uppercase;
            }

            .fs-copy {
              display: grid;
              gap: var(--space-1);
            }

            .fs-title {
              color: var(--fg);
              font-family: var(--font-display);
              font-size: 3.4cqw;
              font-weight: 680;
              line-height: 1;
              letter-spacing: -0.025em;
            }

            .fs-detail {
              color: var(--muted);
              font-size: 1.45cqw;
              line-height: 1.35;
            }

            .fs-meter {
              height: 1.1cqh;
              overflow: hidden;
              border-radius: var(--radius);
              background: color-mix(in srgb, var(--border) 60%, transparent);
            }

            .fs-meter-fill {
              width: var(--fs-meter-width);
              height: 100%;
              border-radius: inherit;
              background: var(--fs-card-accent);
            }
          </style>

          <div class="fs-clip clip" data-start="0" data-duration="1.5" data-track-index="0">
            <div class="fs-pair">
              <article class="fs-card" data-focus-card="a" aria-label="Card A, plan">
                <div class="fs-card-head">
                  <span class="fs-card-letter">A</span>
                  <span class="fs-status">Plan</span>
                </div>
                <div class="fs-copy">
                  <h2 class="fs-title">Shape the idea</h2>
                  <p class="fs-detail">Define the brief and align the team.</p>
                </div>
                <div class="fs-meter" aria-hidden="true">
                  <div class="fs-meter-fill" style="--fs-meter-width: 58%"></div>
                </div>
              </article>

              <article class="fs-card" data-focus-card="b" aria-label="Card B, launch">
                <div class="fs-card-head">
                  <span class="fs-card-letter">B</span>
                  <span class="fs-status">Launch</span>
                </div>
                <div class="fs-copy">
                  <h2 class="fs-title">Ship the result</h2>
                  <p class="fs-detail">Move from approved work to live impact.</p>
                </div>
                <div class="fs-meter" aria-hidden="true">
                  <div class="fs-meter-fill" style="--fs-meter-width: 86%"></div>
                </div>
              </article>
            </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");
              var cardA = root.querySelector('[data-focus-card="a"]');
              var cardB = root.querySelector('[data-focus-card="b"]');
              var vars =
                window.__hyperframes && window.__hyperframes.getVariables
                  ? window.__hyperframes.getVariables()
                  : {};

              // INVARIANT: focus is the only owner of which card advances and
              // which recedes. Invalid input resolves to the declared default.
              var targetIsB = vars.focus !== "a";
              var initialFocused = targetIsB ? cardA : cardB;
              var targetFocused = targetIsB ? cardB : cardA;

              var rawBlur = Number(vars.blurPx);
              var blurPx = Number.isFinite(rawBlur) ? Math.max(0, Math.min(20, rawBlur)) : 6;
              var rawDim = Number(vars.dim);
              var dim = Number.isFinite(rawDim) ? Math.max(0, Math.min(1, rawDim)) : 0.5;
              var blurred = "blur(" + blurPx + "px)";
              var sharp = "blur(0px)";

              // RETIME RANGE: keep the standard 0.20s lead and 0.70s swap. Only
              // short host durations compress them so focus always lands by D.
              var duration = Math.max(0.001, parseFloat(root.dataset.duration || "1.5"));
              var SWAP_START = Math.min(0.2, duration * 0.2);
              var SWAP_DURATION = Math.min(0.7, Math.max(0.001, duration - SWAP_START));

              gsap.set(initialFocused, { opacity: 1, scale: 1, filter: sharp });
              gsap.set(targetFocused, { opacity: dim, scale: 0.92, filter: blurred });

              var tl = gsap.timeline({ paused: true });
              tl.to(
                initialFocused,
                {
                  opacity: dim,
                  scale: 0.92,
                  filter: blurred,
                  duration: SWAP_DURATION,
                  ease: "power2.out",
                },
                SWAP_START,
              );
              tl.to(
                targetFocused,
                {
                  opacity: 1,
                  scale: 1,
                  filter: sharp,
                  duration: SWAP_DURATION,
                  ease: "power2.out",
                },
                SWAP_START,
              );

              tl.seek(0);

              window.__timelines = window.__timelines || {};
              window.__timelines["focus-swap"] = tl;
            })();
          </script>
        </div>
      </template>
    </body>
  </html>
  ```
</Accordion>

Tagged `effect` `ui-props` `focus` `blur` `attention` `demonstrate`.

## 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

- [Focus Rack](/catalog/components/focus-rack.md)
- [Rack Focus](/catalog/blocks/rack-focus.md)
- [Focus Blur Resolve](/catalog/components/focus-blur-resolve.md)
