What problem does it solve? Choosing and configuring the right easing curve for web animations is error-prone, and developers often misuse ease directions, overshoot values, or expensive eases that hurt performance. ## Core Features & Use Cases - Built-in Ease Reference: Covers power, back, elastic, bounce, expo, circ, sine, and steps eases with in/out/inOut modifiers and parameter guidance. - Plugin Eases: Documents EasePack (SlowMo, RoughEase, ExpoScale) plus CustomEase, CustomWiggle, and CustomBounce for bespoke curves. - Selection Guides & Patterns: Provides ease recommendations by use case and CSS property, timeline default configuration, and common mistakes to avoid. - Use Case: When building a modal entrance animation, apply back.out(1.7) with the documented pattern instead of guessing parameters, and use power2.out for staggered lists to keep performance acceptable. ## Quick Start Ask the AI to add a springy elastic entrance animation to a modal element using GSAP with the correct ease and duration.