Modern Flexible JavaScript Animation Engine – Animatry

Animatry is a modern JavaScript animation library that orchestrates CSS properties and SVG elements into performant and flexible web animations.

It handles complex timing, sequencing, and offers a set of powerful plugins for common, yet often tricky, animation tasks.

Features

• Versatile Property Animation: Animate any valid CSS property between arbitrary values and units.
• Advanced Timing Control: Built-in timeline functionality for sequencing multiple animations with precision.
• Staggering: Easily apply staggered delays across multiple elements for ripple or sequential effects.
• Keyframing: Define multi-step animations for individual elements, similar to CSS @keyframes, with property-based, object-based, or percentage-based syntax.
• Declarative & Imperative Workflows: Supports defining animations through object properties or by calling methods directly.
• Animation Controller: Core Controller class manages progress, repetition (including infinite), alternation, delays (initial and iteration-based), and lifecycle events (onStart, onComplete, onUpdate, etc.).
• Tweening Methods: Create animations using animatry.to(), from(), fromTo(), or instantly set properties with animatry.set().
• Rich Easing Library: Includes a comprehensive set of built-in easing functions (power, bounce, elastic, back, steps, cubic-bezier) and supports parameterized and custom easing functions.
• Scroll-Based Animations: The ScrollObserver plugin enables scroll-triggered animations, element pinning using native position: sticky for optimal performance, and the ability to “steer” animation progress with scroll position.
• Smooth Page Scrolling: The ScrollSmooth plugin implements smooth scrolling across the entire page with a single line of code, offering configurable speed, inertia, and separate desktop/mobile settings.
• SVG Morphing: The MorphPath plugin allows smooth transitions between any SVG path or element (like <rect>, <circle>), even if they have different point counts or types.
• Text Manipulation & Animation: The TextSplit plugin breaks down text content into individual characters, words, or lines, allowing for granular animation and stunning reveal effects with stagger.
• Magnetic Cursor Effect: The Magnetic plugin makes elements attract to the mouse cursor within a defined proximity, with configurable strength and speed.
• Responsive Animations: The matchMedia plugin allows you to conditionally apply animations or Animatry logic based on CSS media queries, with automatic context management and cleanup.
• Programmatic Scrolling: The scrollTo plugin provides functionality to smoothly scroll the page to specific elements or pixel coordinates with customizable duration and easing.
• Responsive Typography: The ScaleText plugin automatically scales text (via font-size, letter-spacing, or word-spacing) to fit its container width.
• Utility Functions: Provides a set of helpful utilities for math operations (clamp, round, lerp, random), DOM selection and manipulation, string conversions, and logging.
• Extensibility: Designed to be extensible through its plugin architecture.

See It In Action:

Installation:

npm install animatry

Or, if you prefer a CDN, you’ll need to include four separate scripts. This modular approach helps keep your initial bundle size down, and it’s great because you can use plugins like ScrollObserver without loading the entire base library if you don’t need it.

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How to use it:

To learn how to use Animatry’s core classes (Controller, Tween, Timeline) and its powerful plugins like ScrollObserver, TextSplit, and MorphPath, consult the official documentation for comprehensive API references and usage examples.

Alternatives

• GSAP is the heavyweight champion. It has an enormous feature set, a vast plugin ecosystem (many paid), and is incredibly battle-tested. If you need absolutely everything, including complex physics or 3D transforms, and don’t mind its file size or licensing for some plugins, GSAP is hard to beat. Animatry might be preferable if its specific set of core features and free plugins (like the position: sticky based ScrollObserver or TextSplit) cover your needs well, and you appreciate its potentially more “modern” or streamlined API for those tasks. The modular CDN approach of Animatry is also a distinct advantage for bundle-size conscious projects.
• Anime.js is known for being lightweight and having a very straightforward API for common animation tasks. It’s excellent for getting simpler animations up and running quickly. Animatry appears to aim for a bit more comprehensive feature set than Anime.js, especially with its timeline capabilities and specialized plugins like SVG morphing and scroll observation. If your needs go beyond basic tweens and staggers, Animatry might offer more integrated power.