JavaScript Screen_basics Guide
The Screen object provides display information: size, color depth, orientation, and available area. The guide walks through Screen Properties. `screen.width/height` — total display. `screen.availWidth/availHeight` — minus taskbar. `screen.colorDepth` — bits (24 or 32). `screen.orientation.type` — portrait/landscape. `screen.orientation.angle` — rotation 0/90/180/270. `screen.isExtended` — multi-monitor. Lock: `screen.orientation.lock("portrait")`. Unlock: `.unlock()`. Event: orientationchange. 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.