JavaScript Fullscreen Guide
The Fullscreen API displays elements in fullscreen for videos, games, presentations, and immersive content. The guide walks through Enter & Exit. `element.requestFullscreen({navigationUI:"hide"})` — enter (user gesture). `document.exitFullscreen()` — exit. `document.fullscreenElement` — current element. `document.fullscreenEnabled` — browser support. CSS `:fullscreen` pseudo-class. Events: fullscreenchange, fullscreenerror. 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.