> ## Documentation Index
> Fetch the complete documentation index at: https://hyperframes-fix-nested-composition-media-inpoint.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Squiggle Marks

> Hand-drawn squiggle underline, double-pass strikethrough, and bracket marks that draw on

export const InstallCommand = ({command, item}) => {
  const [copied, setCopied] = React.useState(false);
  const [tuned, setTuned] = React.useState("");
  React.useEffect(() => {
    if (!item) return;
    const read = () => {
      try {
        const raw = new URLSearchParams(window.location.search).get(`vars-${item}`);
        if (!raw) return setTuned("");
        const parsed = JSON.parse(raw);
        if (!parsed || typeof parsed !== "object" || Array.isArray(parsed)) return setTuned("");
        if (Object.keys(parsed).length === 0) return setTuned("");
        setTuned(` --vars '${JSON.stringify(parsed)}'`);
      } catch {
        setTuned("");
      }
    };
    read();
    window.addEventListener("hf-vars-changed", read);
    window.addEventListener("popstate", read);
    return () => {
      window.removeEventListener("hf-vars-changed", read);
      window.removeEventListener("popstate", read);
    };
  }, [item]);
  const fullCommand = `${command}${tuned}`;
  const copy = async () => {
    try {
      if (navigator.clipboard && window.isSecureContext) {
        await navigator.clipboard.writeText(fullCommand);
      } else {
        const previous = document.activeElement;
        const scratch = document.createElement("textarea");
        scratch.value = fullCommand;
        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">
        {fullCommand}
      </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="hw-underline 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/hw-underline.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/hw-underline.png");document.body.appendChild(p)});<\/script></body></html>`} />

## Install

<InstallCommand command="npx hyperframes add hw-underline" item="hw-underline" />

That writes `compositions/components/hw-underline.html`, plus 1 supporting file under `assets/fonts/`.

## Paste it into your composition

Open `compositions/components/hw-underline.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.

## Source

<Accordion title={`hw-underline.html`}>
  ```html theme={null}
  <!doctype html>
  <html lang="en">
    <head>
      <meta charset="utf-8" />
      <script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
      <style>
        @font-face {
          font-family: "Caveat";
          src: url("assets/fonts/Caveat-700-latin.woff2") format("woff2");
          font-weight: 700;
          font-display: block;
        }
        *,
        *::before,
        *::after {
          margin: 0;
          padding: 0;
          box-sizing: border-box;
        }
        body {
          background: transparent;
          overflow: hidden;
        }
        /* ---- hw-underline ------------------------------------------------
           Squiggle underline / strikethrough / bracket marks that draw on.
           Size the wrapper over the text they annotate. Requires the hw-boil
           helpers in the host. */
        .hw-mark {
          position: absolute;
          pointer-events: none;
        }
        .hw-mark svg {
          width: 100%;
          height: 100%;
          overflow: visible;
        }
        .hw-mark path {
          fill: none;
          stroke: var(--hw-mark-color, var(--hw-accent-warm, #ffb020));
          stroke-width: var(--hw-mark-w, 7);
          stroke-linecap: round;
          stroke-linejoin: round;
        }
        /* self-preview scene */
        #hw-un-scene {
          position: absolute;
          inset: 0;
          background: #17161a;
          font-family: var(--hw-font-print, "Caveat", cursive);
          font-weight: 700;
          font-size: 84px;
          color: #f4f2ec;
        }
        #hw-un-scene div {
          position: absolute;
          left: 480px;
          white-space: nowrap;
        }
      </style>
    </head>
    <body>
      <!-- Self-preview. WIRING: copy the .hw-mark CSS + markup pattern, the
           hwMarkPath / hwMarkOn / hwMarkOff helpers, AND the hw-boil helpers.
           Then:

             document.querySelector("#hw-my-mark path")
               .setAttribute("d", hwMarkPath(420, 34, "underline", 4));
             hwMarkOn(tl, "#hw-my-mark", 2.0);
             hwBoil(tl, "#hw-my-mark", { frameDrop: 3, seed: 4 });
      -->
      <div
        id="hw-un-root"
        data-composition-id="hw-underline"
        data-start="0"
        data-duration="4"
        data-width="1920"
        data-height="1080"
      >
        <div id="hw-un-scene">
          <div style="top: 260px">underline the point</div>
          <div style="top: 460px">cross this out</div>
          <div style="top: 660px">bracket the aside</div>
        </div>
        <div
          class="hw-mark"
          id="hw-un-m1"
          style="left: 470px; top: 350px; width: 620px; height: 34px"
        >
          <svg viewBox="0 0 620 34"><path></path></svg>
        </div>
        <div
          class="hw-mark"
          id="hw-un-m2"
          style="left: 470px; top: 500px; width: 480px; height: 34px"
        >
          <svg viewBox="0 0 480 34"><path></path></svg>
        </div>
        <div
          class="hw-mark"
          id="hw-un-m3"
          style="left: 440px; top: 650px; width: 40px; height: 110px"
        >
          <svg viewBox="0 0 40 110"><path></path></svg>
        </div>
        <div
          id="hw-un-drv"
          class="clip"
          data-start="0"
          data-duration="4"
          data-track-index="0"
          style="position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none"
        ></div>
      </div>
      <script>
        (function () {
          window.__timelines = window.__timelines || {};

          /* ---- hw-boil helpers (shared family runtime — copy once per host) ---- */
          window.hwOnUpdate = function (tl, fn) {
            if (!tl.__hwRenders) {
              tl.__hwRenders = [];
              tl.eventCallback("onUpdate", function () {
                for (var i = 0; i < tl.__hwRenders.length; i++) tl.__hwRenders[i]();
              });
            }
            tl.__hwRenders.push(fn);
            fn();
          };
          window.hwHash = function (n, seed) {
            var x = Math.sin(n * 127.1 + (seed || 1) * 311.7) * 43758.5453;
            return (x - Math.floor(x)) * 2 - 1;
          };
          window.hwBoil = function (tl, target, opts) {
            opts = opts || {};
            var amp = opts.amp !== undefined ? opts.amp : 1.6;
            var rot = opts.rot !== undefined ? opts.rot : 0.5;
            var fps = opts.fps || 30;
            var drop = opts.frameDrop || 3;
            var seed = opts.seed || 1;
            var els = gsap.utils.toArray(target);
            window.hwOnUpdate(tl, function () {
              var step = Math.floor((tl.time() * fps) / drop);
              for (var i = 0; i < els.length; i++) {
                gsap.set(els[i], {
                  x: window.hwHash(step * 3 + i * 97, seed) * amp,
                  y: window.hwHash(step * 3 + 1 + i * 97, seed) * amp,
                  rotation: (opts.baseRot || 0) + window.hwHash(step * 3 + 2 + i * 97, seed) * rot,
                });
              }
            });
          };

          // ---- hw-mark helpers (copy these too) ----
          // style: "underline" (squiggle) | "strike" (double pass) | "bracket"
          window.hwMarkPath = function (w, h, style, seed) {
            seed = seed || 1;
            function wob(n, range) {
              return window.hwHash(n, seed) * (range === undefined ? 5 : range);
            }
            var mid = h / 2;
            if (style === "bracket") {
              return (
                "M " +
                (w * 0.9 + wob(1, 3)) +
                " " +
                (2 + wob(2, 3)) +
                " Q " +
                wob(3, 4) +
                " " +
                (2 + wob(4)) +
                " " +
                (4 + wob(5, 3)) +
                " " +
                (h * 0.5 + wob(6)) +
                " Q " +
                wob(7, 4) +
                " " +
                (h - 2 + wob(8)) +
                " " +
                (w * 0.9 + wob(9, 3)) +
                " " +
                (h - 2 + wob(10, 3))
              );
            }
            if (style === "strike") {
              return (
                "M " +
                (2 + wob(1, 3)) +
                " " +
                (mid + wob(2)) +
                " L " +
                (w - 4 + wob(3, 3)) +
                " " +
                (mid - 3 + wob(4)) +
                " M " +
                (w - 10 + wob(5, 4)) +
                " " +
                (mid + 7 + wob(6)) +
                " L " +
                (8 + wob(7, 4)) +
                " " +
                (mid + 3 + wob(8))
              );
            }
            /* underline squiggle */
            var segs = Math.max(5, Math.round(w / 95));
            var d = "M 2 " + (mid + wob(0, 4));
            for (var i = 1; i <= segs; i++) {
              var x = (w / segs) * i;
              d +=
                " Q " +
                (x - w / segs / 2 + wob(i * 4 + 1, 9)) +
                " " +
                (mid + (i % 2 ? -1 : 1) * (9 + wob(i * 4 + 2, 4))) +
                " " +
                x.toFixed(1) +
                " " +
                (mid + wob(i * 4 + 3, 4));
            }
            return d;
          };
          window.hwMarkOn = function (tl, target, at, dur) {
            var p = document.querySelector(target + " path");
            var len = p.getTotalLength();
            gsap.set(p, { strokeDasharray: len, strokeDashoffset: len });
            tl.to(
              p,
              { strokeDashoffset: 0, duration: dur === undefined ? 0.55 : dur, ease: "power2.inOut" },
              at,
            );
          };
          window.hwMarkOff = function (tl, target, at) {
            tl.to(target, { opacity: 0, duration: 0.3, ease: "power2.in" }, at);
          };

          // ---- self-preview ----
          document
            .querySelector("#hw-un-m1 path")
            .setAttribute("d", window.hwMarkPath(620, 34, "underline", 4));
          document
            .querySelector("#hw-un-m2 path")
            .setAttribute("d", window.hwMarkPath(480, 34, "strike", 6));
          document
            .querySelector("#hw-un-m3 path")
            .setAttribute("d", window.hwMarkPath(40, 110, "bracket", 8));
          var tl = gsap.timeline({ paused: true });
          window.hwMarkOn(tl, "#hw-un-m1", 0.4);
          window.hwMarkOn(tl, "#hw-un-m2", 1.0);
          window.hwMarkOn(tl, "#hw-un-m3", 1.6);
          window.hwBoil(tl, [".hw-mark"], { amp: 1.5, rot: 0.4, frameDrop: 3, seed: 5 });
          tl.to([".hw-mark"], { opacity: 0, duration: 0.3, ease: "power2.in" }, 3.5);
          tl.set("#hw-un-root", { visibility: "hidden" }, 3.98);
          window.__timelines["hw-underline"] = tl;
        })();
      </script>
    </body>
  </html>
  ```
</Accordion>

Tagged `handwritten` `annotation` `text-treatment`.

## Related topics

* [Browse the complete Catalog](/catalog)
* [Add assets and Catalog items in Studio](/studio/assets-and-blocks)
* [Build a richer composition](/go-further)
