scroll-out/scroll-out
Scroll Out
Scroll-out is a JavaScript scroll animation library that detects element visibility during scroll to trigger reveal, parallax, and dynamic style effects. It serves as a CSS custom property scroll driver that computes and applies live property values based on scroll position, allowing page styles to adapt fluidly, alongside functioning as a DOM viewport intersection observer that monitors when elements enter or leave the browser viewport to update their visual state attributes.
The library maps real-time scroll offsets and element positions directly to custom CSS properties for fluid visual transformations and supports building multi-layered parallax visual effects and scroll-driven CSS animations. Configuration, offsets, and element targeting are handled entirely through descriptive HTML markup annotations without requiring JavaScript setup, while custom callback functions execute at specific phases of element visibility changes to coordinate complex animations.
Global scroll and resize listeners are coordinated efficiently using request animation frames to minimize performance overhead during movement, and modern browser visibility detection includes automatic fallbacks to traditional scroll event listeners when APIs are missing.
Features
- Scroll-Driven Custom Property Drivers - Computes and applies live property values based on scroll position so page styles adapt fluidly.
- Parallax Effects - Supports building multi-layered parallax visual effects that respond smoothly to document scroll movements.
- Scroll-Based Style Interpolations - Computes and applies live property values based on scroll positions so page styles adapt fluidly.
- Scroll-Driven Animation Tools - Creates fluid website animations that track user scroll position to update styles dynamically.
- Scroll Trigger Libraries - Detects element visibility during scroll to trigger reveal, parallax, and dynamic style effects.
- Viewport Observers - Monitors when elements enter or leave the browser viewport to update their visual state attributes.
- Element Visibility Detection - Detects when target elements enter the visible screen area to trigger corresponding state updates.
- Scroll Orchestrators - Coordinates global scroll and resize listeners efficiently using request animation frames to minimize overhead.
- CSS Custom Property Bindings - Maps real-time scroll offsets directly to custom CSS properties for fluid hardware-accelerated animations.
- CSS Variable Bindings - Binds element coordinates to custom CSS variables to enable smooth style transitions on movement.
- Configuration Attributes - Configures element targeting and behavior directly through descriptive HTML markup annotations.
- Intersection Observer Implementations - Monitors when elements enter or leave the browser viewport using modern APIs with event fallbacks.
