JavaScript Webanimations Guide
The Web Animations API creates performant animations with JavaScript, bridging CSS animations and JS-driven effects. The guide walks through Basic Animation. `element.animate(keyframes,{duration:1000,easing:"ease-in",iterations:Infinity,direction:"alternate"})`. Keyframes: `[{opacity:0},{opacity:1}]`. Control: play(), pause(), reverse(), cancel(), finish(). Properties: currentTime, playbackRate, startTime, finished promise. The guide is organized into 1 sections that build on each other, each pairing a prose explanation with runnable code. Related guides: Arrays, Strings, Numbers, Math, Date. This is one of 145 JavaScript guides on JS Reference — see the full list on the guides page. Practice what you learn in the JavaScript playground, and look up any unfamiliar term in the JavaScript glossary.