Tracely-ai: Skill for Claude Code

GSAP with Vue, Svelte, and Other Frameworks

When to Use This Skill

Apply when writing or reviewing GSAP code in Vue (or Nuxt), Svelte (or SvelteKit), or other component frameworks that use a lifecycle (mounted/unmounted). For React specifically, use gsap-react (useGSAP hook, gsap.context()).

Related skills: For tweens and timelines use gsap-core and gsap-timeline; for scroll-based animation use gsap-scrolltrigger; for React use gsap-react.

Principles (All Frameworks)

• Create tweens and ScrollTriggers after the component’s DOM is available (e.g. onMounted, onMount).
• Kill or revert them in the unmount (or equivalent) cleanup so nothing runs on detached nodes and there are no leaks.
• Scope selectors to the component root so .box and similar only match elements inside that component, not the rest of the page.

Vue 3 (Composition API)

See examples/vue/ for a runnable Vite + Vue 3 project demonstrating these patterns.

Use onMounted to run GSAP after the component is in the DOM. Use onUnmounted to clean up.

import { onMounted, onUnmounted, ref } from "vue";
import { gsap } from "gsap";
import { ScrollTrigger } from "gsap/ScrollTrigger";
gsap.registerPlugin(ScrollTrigger); // once per app, e.g. in main.js

export default {
  setup() {
    const container = ref(null);
    let ctx;

    onMounted(() => {
      if (!container.value) return;
      ctx = gsap.context(() => {
        gsap.to(".box", { x: 100, duration: 0.6 });
        gsap.from(".item", { autoAlpha: 0, y: 20, stagger: 0.1 });
      }, container.value);
    });

    onUnmounted(() => {
      ctx?.revert();
    });

    return { container };
  },
};

• ✅ gsap.context(scope) — pass the container ref (e.g. container.value) as the second argument so selectors like .item are scoped to that root. All animations and ScrollTriggers created inside the callback are tracked and reverted when ctx.revert() is called.
• ✅ onUnmounted — always call ctx.revert() so tweens and ScrollTriggers are killed and inline styles reverted.