Let’s look at differences between CSS Transitions/Animations and the Web Animation API (WAAPI), plus hands-on animation examples.

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The Web Animation API (WAAPI) is a browser-native JavaScript API that provides programmatic control over animations without external dependencies. Unlike CSS transitions and animations, WAAPI offers runtime control through methods like play(), pause(), and playbackRate(), plus the ability to chain animations using promises. The tutorial covers keyframes, timing options, interactive controls, and performance considerations—emphasizing that animating transform and opacity properties ensures smooth 60 FPS performance by leveraging GPU compositing instead of triggering expensive layout recalculations.

The Web Animation API

Getting Started with the Web Animation API