From gsap-skills
Guides GSAP timeline creation, position parameters for tween placement, labels, nesting, defaults, and playback for sequencing animations.
npx claudepluginhub greensock/gsap-skills --plugin gsap-skillsThis skill uses the workspace's default tool permissions.
Apply when building multi-step animations, coordinating several tweens in sequence or parallel, or when the user asks about timelines, sequencing, or keyframe-style animation in GSAP.
Generates design tokens/docs from CSS/Tailwind/styled-components codebases, audits visual consistency across 10 dimensions, detects AI slop in UI.
Records polished WebM UI demo videos of web apps using Playwright with cursor overlay, natural pacing, and three-phase scripting. Activates for demo, walkthrough, screen recording, or tutorial requests.
Delivers idiomatic Kotlin patterns for null safety, immutability, sealed classes, coroutines, Flows, extensions, DSL builders, and Gradle DSL. Use when writing, reviewing, refactoring, or designing Kotlin code.
Apply when building multi-step animations, coordinating several tweens in sequence or parallel, or when the user asks about timelines, sequencing, or keyframe-style animation in GSAP.
Related skills: For single tweens and eases use gsap-core; for scroll-driven timelines use gsap-scrolltrigger; for React use gsap-react.
const tl = gsap.timeline();
tl.to(".a", { x: 100, duration: 1 })
.to(".b", { y: 50, duration: 0.5 })
.to(".c", { opacity: 0, duration: 0.3 });
By default, tweens are appended one after another. Use the position parameter to place tweens at specific times or relative to other tweens.
Third argument (or position property in vars) controls placement:
1 — start at 1 second."+=0.5" — 0.5s after end; "-=0.2" — 0.2s before end."labelName" — at that label; "labelName+=0.3" — 0.3s after label."<" — start when recently-added animation starts; ">" — start when recently-added animation ends (default); "<0.2" — 0.2s after recently-added animation start.Examples:
tl.to(".a", { x: 100 }, 0); // at 0
tl.to(".b", { y: 50 }, "+=0.5"); // 0.5s after last end
tl.to(".c", { opacity: 0 }, "<"); // same start as previous
tl.to(".d", { scale: 2 }, "<0.2"); // 0.2s after previous start
Pass defaults into the timeline so all child tweens inherit:
const tl = gsap.timeline({ defaults: { duration: 0.5, ease: "power2.out" } });
tl.to(".a", { x: 100 }).to(".b", { y: 50 }); // both use 0.5s and power2.out
.play() to start.Add and use labels for readable, maintainable sequencing:
tl.addLabel("intro", 0);
tl.to(".a", { x: 100 }, "intro");
tl.addLabel("outro", "+=0.5");
tl.to(".b", { opacity: 0 }, "outro");
tl.play("outro"); // start from "outro"
tl.tweenFromTo("intro", "outro"); // pauses the timeline and returns a new Tween that animates the timeline's playhead from intro to outro with no ease.
Timelines can contain other timelines.
const master = gsap.timeline();
const child = gsap.timeline();
child.to(".a", { x: 100 }).to(".b", { y: 50 });
master.add(child, 0);
master.to(".c", { opacity: 0 }, "+=0.2");
addLabel() for readable, maintainable sequencing.gsap.timeline() and the position parameter for multi-step animation.defaults: { duration: 0.5, ease: "power2.out" }) when many child tweens share the same duration or ease.