> ## 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.

# SVG Stroke Trace

> An authored SVG path draws from its measured length, holds with subtle drift, and optionally fills when the path is closed.

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

## Install

<InstallCommand command="npx hyperframes add svg-stroke-trace" />

That writes one file: `compositions/components/svg-stroke-trace.html`.

## Paste it into your composition

Open `compositions/components/svg-stroke-trace.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                                                                    |
| -------------- | ----------------------------------------------------------------------------------------------------------------- | ------------------------- | ------------------------------------------------------------------------------- |
| `path`         | `M 92 328 C 178 142 292 138 366 276 C 430 396 500 414 558 262 C 622 94 724 112 786 274 C 836 406 894 376 930 194` | string                    | SVG path data for the authored mark.                                            |
| `stroke_width` | `12`                                                                                                              | 2 to 32, step 1           | Width of the traced stroke in SVG viewBox units.                                |
| `accent`       | `green`                                                                                                           | `green`, `blue`, `violet` | Color used by the trace and optional fill.                                      |
| `exit`         | `none`                                                                                                            | `none`, `fade`, `up`      | Optional departure. Default none: the finished mark holds until the frame cuts. |

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="svg-stroke-trace"
  data-composition-src="compositions/components/svg-stroke-trace.html"
  data-variable-values='{"path":"M 92 328 C 178 142 292 138 366 276 C 430 396 500 414 558 262 C 622 94 724 112 786 274 C 836 406 894 376 930 194","stroke_width":12,"accent":"green","exit":"none"}'
></div>
```

## Source

<Accordion title={`svg-stroke-trace.html`}>
  ```html theme={null}
  <!doctype html>
  <!--
    svg-stroke-trace: HyperFrames video primitive (intros and reveals)

    An authored SVG path draws from start to finish using its measured length.
    Closed paths receive a restrained fill after the stroke completes. Open
    paths remain stroke-only, which keeps signatures and waves clean.

    Variables:
      - path (string): SVG path data for the traced mark.
      - stroke_width (number, default 12): stroke width in viewBox units.
      - accent (green | blue | violet, default green): trace and fill color.
      - exit (none | fade | up, default "none"): optional departure.

    Envelope, fixed IN and OUT with elastic HOLD only:
      IN_BASE  = 1.85s, stroke draw followed by optional closed-path fill
      HOLD     = max(0, D - IN - OUT), one subtle vertical drift cycle
      OUT_BASE = 0.45s departure when exit is fade or up, 0s when exit is
                 none (the default: the finished mark holds until the cut)
      If D is shorter than IN_BASE + OUT_BASE, IN and OUT compress together.
      The timeline is never time-scaled.

    Mount contract: the runtime clones only this template. #root fills the host
    box, establishes the container query basis, has no data-width or data-height,
    and registers one paused timeline under the literal svg-stroke-trace key.
  -->
  <html
    lang="en"
    data-composition-id="svg-stroke-trace"
    data-composition-duration="3.5"
    data-composition-variables='[
      { "id": "path", "type": "string", "role": "content", "label": "Path", "description": "SVG path data for the authored mark.", "default": "M 92 328 C 178 142 292 138 366 276 C 430 396 500 414 558 262 C 622 94 724 112 786 274 C 836 406 894 376 930 194" },
      { "id": "stroke_width", "type": "number", "role": "style", "label": "Stroke width", "description": "Width of the traced stroke in SVG viewBox units.", "default": 12, "min": 2, "max": 32, "step": 1 },
      { "id": "accent", "type": "enum", "role": "style", "label": "Accent", "description": "Color used by the trace and optional fill.", "default": "green", "options": [{ "value": "green", "label": "Green" }, { "value": "blue", "label": "Blue" }, { "value": "violet", "label": "Violet" }] },
      { "id": "exit", "type": "enum", "role": "timing", "label": "Exit", "description": "Optional departure. Default none: the finished mark holds until the frame cuts.", "default": "none", "options": [{ "value": "none", "label": "None" }, { "value": "fade", "label": "Fade" }, { "value": "up", "label": "Up" }] }
    ]'
  >
    <head>
      <meta charset="UTF-8" />
      <title>SVG Stroke Trace</title>
    </head>
    <body>
      <template>
        <div id="root" data-composition-id="svg-stroke-trace" data-duration="3.5" data-fps="30">
          <style>
            *,
            *::before,
            *::after {
              box-sizing: border-box;
            }

            #root {
              position: absolute;
              inset: 0;
              overflow: hidden;
              container-type: size;
              isolation: isolate;
              pointer-events: none;
            }

            .sst-clip {
              position: absolute;
              inset: 0;
              display: grid;
              place-items: center;
              overflow: hidden;
            }

            .sst-stage {
              width: 88cqw;
              height: 70cqh;
              opacity: 0;
              will-change: transform, opacity;
            }

            .sst-svg {
              display: block;
              width: 100%;
              height: 100%;
              overflow: visible;
            }

            .sst-fill,
            .sst-stroke {
              stroke-linecap: round;
              stroke-linejoin: round;
            }

            .sst-fill {
              fill: var(--sst-accent);
              stroke: none;
              opacity: 0;
            }

            .sst-stroke {
              fill: none;
              stroke: var(--sst-accent);
              filter: drop-shadow(
                0 0 1.8cqmin color-mix(in srgb, var(--sst-accent) 34%, transparent)
              );
            }
          </style>

          <div
            id="svg-stroke-trace-clip"
            class="sst-clip clip"
            data-start="0"
            data-duration="3.5"
            data-track-index="0"
          >
            <div class="sst-stage" role="img">
              <svg
                class="sst-svg"
                viewBox="0 0 1024 520"
                preserveAspectRatio="xMidYMid meet"
                aria-hidden="true"
              >
                <path class="sst-fill"></path>
                <path class="sst-stroke"></path>
              </svg>
            </div>
          </div>

          <script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
          <script>
            (function () {
              "use strict";

              var DEFAULT_PATH =
                "M 92 328 C 178 142 292 138 366 276 C 430 396 500 414 558 262 C 622 94 724 112 786 274 C 836 406 894 376 930 194";
              var root = document.getElementById("root");
              var stage = root.querySelector(".sst-stage");
              var fillPath = root.querySelector(".sst-fill");
              var strokePath = root.querySelector(".sst-stroke");
              var vars =
                window.__hyperframes && window.__hyperframes.getVariables
                  ? window.__hyperframes.getVariables()
                  : {};

              var suppliedPath = vars.path == null ? DEFAULT_PATH : String(vars.path).trim();
              var pathData = suppliedPath || DEFAULT_PATH;
              var widthValue = vars.stroke_width;
              var strokeWidth = Number.isFinite(widthValue)
                ? Math.max(2, Math.min(32, widthValue))
                : 12;
              var accentColors = {
                green: "var(--brand, #71f5a7)",
                blue: "var(--accent, #61a8ff)",
                violet: "var(--accent-2, #c5a3ff)",
              };
              var accent = Object.prototype.hasOwnProperty.call(accentColors, vars.accent)
                ? vars.accent
                : "green";
              var exit = vars.exit === "fade" || vars.exit === "up" ? vars.exit : "none";

              root.style.setProperty("--sst-accent", accentColors[accent]);
              fillPath.setAttribute("d", pathData);
              strokePath.setAttribute("d", pathData);
              strokePath.setAttribute("stroke-width", String(strokeWidth));
              stage.setAttribute("aria-label", "Authored SVG path tracing from start to finish");

              var pathLength = strokePath.getTotalLength();
              strokePath.style.strokeDasharray = pathLength + " " + pathLength;
              strokePath.style.strokeDashoffset = String(pathLength);

              // A trailing close command is the single owner of fill behavior.
              // Open signatures and waves never receive an implied closing fill.
              var fillEnabled = /[zZ]\s*$/.test(pathData);

              var IN_BASE = 1.85;
              var OUT_BASE = exit === "none" ? 0 : 0.45;
              var DRAW_SHARE = 0.84;
              var duration = Math.max(0.001, parseFloat(root.dataset.duration || "3.5"));
              var fixedTotal = Math.max(0.001, IN_BASE + OUT_BASE);
              var phaseScale = duration < fixedTotal ? duration / fixedTotal : 1;
              var IN = IN_BASE * phaseScale;
              var OUT = OUT_BASE * phaseScale;
              var DRAW = IN * DRAW_SHARE;
              var FILL = IN - DRAW;
              var HOLD = Math.max(0, duration - IN - OUT);
              var HOLD_START = IN;
              var OUT_START = IN + HOLD;

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

              // IN: the path measurement owns both dash values, so every authored
              // path draws exactly once regardless of its geometry.
              tl.to(stage, { opacity: 1, duration: Math.min(0.28, DRAW), ease: "power2.out" }, 0);
              tl.to(strokePath, { strokeDashoffset: 0, duration: DRAW, ease: "sine.inOut" }, 0);

              if (fillEnabled) {
                tl.to(fillPath, { opacity: 0.16, duration: FILL, ease: "power2.out" }, DRAW);
              }

              // HOLD: one finite drift cycle keeps longer mounts alive.
              if (HOLD > 0) {
                tl.to(
                  stage,
                  {
                    y: "-0.7cqh",
                    duration: HOLD / 2,
                    ease: "sine.inOut",
                    yoyo: true,
                    repeat: 1,
                  },
                  HOLD_START,
                );
              }

              // OUT: optional departure; exit none holds until the frame cuts.
              if (exit === "up") {
                tl.to(
                  stage,
                  { opacity: 0, y: "-2.4cqh", duration: OUT, ease: "power2.in" },
                  OUT_START,
                );
              } else if (exit === "fade") {
                tl.to(stage, { opacity: 0, duration: OUT, ease: "power2.in" }, OUT_START);
              }

              tl.seek(0);
              window.__timelines = window.__timelines || {};
              window.__timelines["svg-stroke-trace"] = tl;
            })();
          </script>
        </div>
      </template>
    </body>
  </html>
  ```
</Accordion>

Tagged `motion-primitive` `intro` `reveal` `svg` `stroke` `line-draw`.

## 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

- [Oscilloscope Trace](/catalog/blocks/oscilloscope-trace.md)
- [SVG Line Draw Loader](/catalog/components/svg-line-draw-loader.md)
- [3D UI Reveal](/catalog/blocks/ui-3d-reveal.md)
