GSAP Fundamentals

Core animation concepts with GreenSock Animation Platform.

Quick Start

npm install gsap

import gsap from 'gsap';

// Basic tween
gsap.to('.box', {
  x: 200,
  duration: 1,
  ease: 'power2.out'
});

Core Concepts

Tween Types

Method	Description	Use Case
gsap.to()	Animate from current → target	Most common
gsap.from()	Animate from target → current	Entrance animations
gsap.fromTo()	Animate from defined start → end	Full control
gsap.set()	Instantly set properties	Initial state

Basic Tweens

// To: current state → target
gsap.to('.element', {
  x: 100,
  y: 50,
  rotation: 360,
  duration: 1
});

// From: target → current state
gsap.from('.element', {
  opacity: 0,
  y: -50,
  duration: 0.5
});

// FromTo: explicit start and end
gsap.fromTo('.element',
  { opacity: 0, scale: 0.5 },  // from
  { opacity: 1, scale: 1, duration: 1 }  // to
);

// Set: instant property change
gsap.set('.element', { visibility: 'visible', opacity: 0 });

Animation Properties

Transform Properties

gsap.to('.element', {
  // Position
  x: 100,           // translateX in pixels
  y: 50,            // translateY in pixels
  xPercent: 50,     // translateX as percentage of element width
  yPercent: -100,   // translateY as percentage of element height

  // Rotation
  rotation: 360,    // 2D rotation in degrees
  rotationX: 45,    // 3D rotation around X axis
  rotationY: 45,    // 3D rotation around Y axis

  // Scale
  scale: 1.5,       // Uniform scale
  scaleX: 2,        // Horizontal scale
  scaleY: 0.5,      // Vertical scale

  // Skew
  skewX: 20,        // Horizontal skew in degrees
  skewY: 10,        // Vertical skew in degrees

  // Transform origin
  transformOrigin: 'center center',
  transformPerspective: 500,

  duration: 1
});

CSS Properties

gsap.to('.element', {
  //...