Sticky Mock Swap

Install

That writes one file: compositions/components/sticky-mock-swap.html.

Paste it into your composition

Open compositions/components/sticky-mock-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
`captions`	`Instant previews,Zero config,Ship on Friday`	string	Comma-separated feature captions shown beside the pinned mock.
`accent`	`violet`	`green`, `blue`, `violet`	Accent tint used across the mock states.

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:

<div
  data-composition-id="sticky-mock-swap"
  data-composition-src="compositions/components/sticky-mock-swap.html"
  data-variable-values='{"captions":"Instant previews,Zero config,Ship on Friday","accent":"violet"}'
></div>

Source

sticky-mock-swap.html

<!doctype html>
<!--
  sticky-mock-swap: HyperFrames video primitive (product-demo / demonstrate)

  Concept: a product mock stays pinned while captions advance beside it. Each
  caption rises along a shallow arc, holds, pauses before dismissal, then exits
  upward along a second arc. At every caption threshold, only the mock content
  cross-fades to the corresponding accent-tinted skeleton state.

  Variables:
    - captions (comma-separated string): feature captions. Whitespace and empty
      entries are removed, with the declared default used when none remain.
    - accent (green | blue | violet): tint shared by all mock states.

  Envelope (caption-count driven, never timeScale):
    PHASE = D / parsed caption count.
    IN_BASE = 0.38s per phase for the caption rise and mock cross-fade.
    HOLD = elastic per phase. Longer mounts stretch only this still-readable
           interval, with a subtle seek-driven pulse inside the pinned mock.
    OUT_BASE = 0.28s exit-delay plus 0.32s caption exit per phase.
    If a phase is shorter than the fixed motion envelope, IN and OUT compress
    proportionally and HOLD becomes zero. At the default D=6 and three captions,
    the 0.28s stillness before each exit stays inside the 0.2s to 0.4s house rule.

  Mount contract: this is a template-wrapped sub-composition. The runtime clones
  only template contents. #root fills the host-owned box, has no data-width or
  data-height, and establishes the cqw/cqh basis for every internal measurement.
  One paused timeline is registered under the hardcoded sticky-mock-swap id.
-->
<html
  lang="en"
  data-composition-id="sticky-mock-swap"
  data-composition-duration="6"
  data-composition-variables='[
    { "id": "captions", "type": "string", "role": "content", "label": "Captions", "description": "Comma-separated feature captions shown beside the pinned mock.", "default": "Instant previews,Zero config,Ship on Friday" },
    { "id": "accent", "type": "enum", "role": "style", "label": "Accent", "description": "Accent tint used across the mock states.", "default": "violet", "options": [{ "value": "green", "label": "Green" }, { "value": "blue", "label": "Blue" }, { "value": "violet", "label": "Violet" }] }
  ]'
>
  <head>
    <meta charset="UTF-8" />
    <title>Sticky Mock Swap</title>
  </head>
  <body>
    <template>
      <div id="root" data-composition-id="sticky-mock-swap" data-duration="6" data-fps="30">
        <style>
          *,
          *::before,
          *::after {
            box-sizing: border-box;
          }

          #root {
            position: absolute;
            inset: 0;
            overflow: hidden;
            container-type: size;
            isolation: isolate;
            background: var(--bg, #0b0c0e);
            color: var(--fg, #f8fafc);
            font-family: var(--font-body, Inter, system-ui, sans-serif);
            pointer-events: none;
          }

          .sms-clip {
            position: absolute;
            inset: 0;
            overflow: hidden;
          }

          .sms-shell {
            width: 100%;
            height: 100%;
            display: grid;
            grid-template-columns: minmax(0, 1.16fr) minmax(0, 0.84fr);
            align-items: center;
            gap: 5cqw;
            padding: 8cqh 7cqw;
          }

          .sms-mock {
            position: relative;
            width: 100%;
            height: 70cqh;
            overflow: hidden;
            border: 0.12cqmin solid color-mix(in srgb, var(--border, #334155) 74%, transparent);
            border-radius: 2.8cqmin;
            background: var(--surface, #121722);
            box-shadow: 0 4cqh 10cqh color-mix(in srgb, #000 46%, transparent);
          }

          .sms-states,
          .sms-state {
            position: absolute;
            inset: 0;
          }

          .sms-state {
            --sms-live: 0.64;
            display: grid;
            grid-template-rows: 8cqh minmax(0, 1fr);
            overflow: hidden;
            opacity: 0;
            background: color-mix(in srgb, var(--surface, #121722) 94%, var(--sms-accent));
          }

          .sms-toolbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 2.2cqw;
            border-bottom: 0.1cqmin solid
              color-mix(in srgb, var(--border, #334155) 62%, transparent);
            background: color-mix(in srgb, #0f131c 92%, var(--sms-accent));
          }

          .sms-dots {
            display: flex;
            gap: 0.55cqw;
          }

          .sms-dots i {
            width: 0.62cqw;
            aspect-ratio: 1;
            border-radius: 50%;
            background: color-mix(in srgb, var(--muted, #94a3b8) 46%, transparent);
          }

          .sms-status {
            width: 7.4cqw;
            height: 1.2cqh;
            border-radius: 1cqmin;
            opacity: var(--sms-live);
            background: var(--sms-accent);
          }

          .sms-window {
            display: grid;
            grid-template-columns: 24% minmax(0, 1fr);
            min-height: 0;
          }

          .sms-sidebar {
            display: flex;
            flex-direction: column;
            gap: 2.3cqh;
            padding: 3.2cqh 1.8cqw;
            border-right: 0.1cqmin solid color-mix(in srgb, var(--border, #334155) 52%, transparent);
            background: color-mix(in srgb, #0e121a 94%, var(--sms-accent));
          }

          .sms-sidebar i,
          .sms-title,
          .sms-subtitle,
          .sms-block {
            display: block;
            border-radius: 0.7cqmin;
            background: color-mix(in srgb, var(--muted, #94a3b8) 20%, transparent);
          }

          .sms-sidebar i {
            width: 82%;
            height: 1.2cqh;
          }

          .sms-sidebar i:first-child {
            width: 100%;
            background: color-mix(in srgb, var(--sms-accent) 54%, transparent);
          }

          .sms-main {
            position: relative;
            min-width: 0;
            padding: 4.4cqh 2.5cqw;
          }

          .sms-title {
            width: 46%;
            height: 2.1cqh;
            background: color-mix(in srgb, var(--fg, #f8fafc) 44%, transparent);
          }

          .sms-subtitle {
            width: 68%;
            height: 1.2cqh;
            margin-top: 1.8cqh;
          }

          .sms-canvas {
            position: absolute;
            inset: 11.5cqh 2.5cqw 4.2cqh;
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            grid-template-rows: repeat(2, minmax(0, 1fr));
            gap: 1.5cqmin;
          }

          .sms-block {
            position: relative;
            overflow: hidden;
            border: 0.1cqmin solid color-mix(in srgb, var(--border, #334155) 54%, transparent);
            background: color-mix(in srgb, #263044 54%, transparent);
          }

          .sms-block::after {
            content: "";
            position: absolute;
            left: 12%;
            right: 12%;
            bottom: 16%;
            height: 0.8cqh;
            border-radius: 1cqmin;
            opacity: var(--sms-live);
            background: var(--sms-accent);
          }

          .sms-state--2 .sms-canvas {
            grid-template-columns: 1fr;
            grid-template-rows: repeat(4, minmax(0, 1fr));
          }

          .sms-state--2 .sms-block::after {
            left: 8%;
            right: 35%;
            bottom: 28%;
          }

          .sms-state--3 .sms-canvas {
            grid-template-columns: 1.45fr 0.55fr;
            grid-template-rows: repeat(3, minmax(0, 1fr));
          }

          .sms-state--3 .sms-block:first-child {
            grid-row: 1 / 4;
          }

          .sms-state--3 .sms-block::after {
            left: 10%;
            right: 18%;
            bottom: 18%;
          }

          .sms-captions {
            position: relative;
            width: 100%;
            height: 32cqh;
          }

          .sms-caption {
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            max-width: 34cqw;
            color: var(--fg, #f8fafc);
            font-family: var(--font-display, Inter, system-ui, sans-serif);
            font-size: 5.8cqmin;
            font-weight: 720;
            line-height: 1.04;
            letter-spacing: -0.04em;
            overflow-wrap: anywhere;
            opacity: 0;
            will-change: transform, opacity;
          }

          .sms-caption::before {
            content: "";
            flex: 0 0 auto;
            align-self: center;
            width: 0.75cqw;
            height: 9cqh;
            margin-right: 1.5cqw;
            border-radius: 1cqmin;
            background: var(--sms-accent);
            box-shadow: 0 0 2cqmin color-mix(in srgb, var(--sms-accent) 48%, transparent);
          }
        </style>

        <div
          id="sticky-mock-swap-clip"
          class="sms-clip clip"
          data-start="0"
          data-duration="6"
          data-track-index="0"
        >
          <div class="sms-shell">
            <div class="sms-mock" aria-hidden="true">
              <div class="sms-states"></div>
            </div>
            <div class="sms-captions" aria-label="Feature captions"></div>
          </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 captionsHost = root.querySelector(".sms-captions");
            var statesHost = root.querySelector(".sms-states");
            var vars =
              window.__hyperframes && window.__hyperframes.getVariables
                ? window.__hyperframes.getVariables()
                : {};

            var DEFAULT_CAPTIONS = ["Instant previews", "Zero config", "Ship on Friday"];
            var captionsSource =
              vars.captions == null ? DEFAULT_CAPTIONS.join(",") : String(vars.captions);
            var captions = captionsSource.split(",").reduce(function (parsed, token) {
              var caption = token.trim();
              if (caption) parsed.push(caption);
              return parsed;
            }, []);
            if (captions.length === 0) captions = DEFAULT_CAPTIONS.slice();

            var accent =
              vars.accent === "green" || vars.accent === "blue" || vars.accent === "violet"
                ? vars.accent
                : "violet";
            var accentColors = {
              green: "var(--brand, #34d399)",
              blue: "var(--accent, #38bdf8)",
              violet: "var(--accent-2, #a78bfa)",
            };
            root.style.setProperty("--sms-accent", accentColors[accent]);

            var captionElements = [];
            var stateElements = [];

            captions.forEach(function (captionText, index) {
              var caption = document.createElement("div");
              caption.className = "sms-caption";
              caption.textContent = captionText;
              captionsHost.appendChild(caption);
              captionElements.push(caption);

              var state = document.createElement("div");
              state.className = "sms-state sms-state--" + ((index % 3) + 1);
              state.setAttribute("aria-hidden", "true");
              state.innerHTML =
                '<div class="sms-toolbar"><span class="sms-dots"><i></i><i></i><i></i></span><span class="sms-status"></span></div>' +
                '<div class="sms-window"><aside class="sms-sidebar"><i></i><i></i><i></i><i></i></aside>' +
                '<main class="sms-main"><span class="sms-title"></span><span class="sms-subtitle"></span>' +
                '<div class="sms-canvas"><i class="sms-block"></i><i class="sms-block"></i><i class="sms-block"></i><i class="sms-block"></i></div></main></div>';
              statesHost.appendChild(state);
              stateElements.push(state);
            });

            var durationValue = parseFloat(root.dataset.duration || "6");
            var duration = Number.isFinite(durationValue) ? Math.max(0.001, durationValue) : 6;

            // Caption count owns the threshold grid. Longer durations add only
            // to each phase's HOLD, never by scaling the completed timeline.
            var phaseDuration = duration / captions.length;
            var RISE_BASE = 0.38;
            var EXIT_DELAY_BASE = 0.28;
            var EXIT_BASE = 0.32;
            var MOTION_BASE = RISE_BASE + EXIT_DELAY_BASE + EXIT_BASE;
            var motionScale = phaseDuration < MOTION_BASE ? phaseDuration / MOTION_BASE : 1;
            var RISE = RISE_BASE * motionScale;
            var EXIT_DELAY = EXIT_DELAY_BASE * motionScale;
            var EXIT = EXIT_BASE * motionScale;
            var HOLD = Math.max(0, phaseDuration - RISE - EXIT_DELAY - EXIT);
            var SWAP = Math.min(0.28 * motionScale, phaseDuration * 0.4);

            captionElements.forEach(function (caption, index) {
              gsap.set(caption, { opacity: 0, x: "-1.2cqw", y: "3.6cqh" });
              gsap.set(stateElements[index], { opacity: index === 0 ? 1 : 0, "--sms-live": 0.64 });
            });

            var tl = gsap.timeline({ paused: true });

            captionElements.forEach(function (caption, index) {
              var phaseStart = index * phaseDuration;
              var riseArc = RISE * 0.72;
              var exitStart = phaseStart + RISE + HOLD + EXIT_DELAY;
              var exitArc = EXIT * 0.32;

              // IN: two authored segments form a shallow arrival arc.
              tl.fromTo(
                caption,
                { opacity: 0, x: "-1.2cqw", y: "3.6cqh" },
                {
                  opacity: 1,
                  x: "0.45cqw",
                  y: "-0.28cqh",
                  duration: riseArc,
                  ease: "power2.out",
                },
                phaseStart,
              );
              tl.to(
                caption,
                {
                  x: "0cqw",
                  y: "0cqh",
                  duration: RISE - riseArc,
                  ease: "power2.out",
                },
                phaseStart + riseArc,
              );

              if (index > 0) {
                tl.to(
                  stateElements[index - 1],
                  { opacity: 0, duration: SWAP, ease: "power2.in" },
                  phaseStart,
                );
                tl.fromTo(
                  stateElements[index],
                  { opacity: 0 },
                  { opacity: 1, duration: SWAP, ease: "power2.out" },
                  phaseStart,
                );
              }

              // HOLD: the mock content breathes without moving the pinned panel.
              if (HOLD >= 0.4) {
                tl.to(
                  stateElements[index],
                  {
                    "--sms-live": 0.9,
                    duration: HOLD / 2,
                    ease: "sine.inOut",
                    yoyo: true,
                    repeat: 1,
                  },
                  phaseStart + RISE,
                );
              }

              // OUT: EXIT_DELAY is empty stillness, then two segments arc upward.
              tl.to(
                caption,
                {
                  x: "0.42cqw",
                  y: "-0.9cqh",
                  duration: exitArc,
                  ease: "power2.in",
                },
                exitStart,
              );
              tl.to(
                caption,
                {
                  opacity: 0,
                  x: "-1.1cqw",
                  y: "-4.5cqh",
                  duration: EXIT - exitArc,
                  ease: "power2.in",
                },
                exitStart + exitArc,
              );
            });

            tl.seek(0);
            window.__timelines = window.__timelines || {};
            window.__timelines["sticky-mock-swap"] = tl;
          })();
        </script>
      </div>
    </template>
  </body>
</html>

Tagged motion-primitive product-demo sticky mock crossfade feature-tour.

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Variables

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Install

Paste it into your composition

Variables

Source

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