Window Screen
The window.screen object can be written without the window prefix.
Properties:
Window Screen Width
The screen.width property returns the width of the visitor's screen in pixels.
Example
Display the width of the screen in pixels:
document.getElementById("demo").innerHTML =
"Screen Width: " + screen.width;
Result will be:
Screen Width: 1280
Try it Yourself
Window Screen Height
The screen.height property returns the height of the visitor's screen in pixels.
Example
Display the height of the screen in pixels:
document.getElementById("demo").innerHTML =
"Screen Height: " + screen.height;
Result will be:
Screen Height: 800
Try it Yourself
Window Screen Available Width
The screen.availWidth property returns the width of the visitor's screen, in pixels, minus interface features like the Windows Taskbar.
Example
Display the available width of the screen in pixels:
document.getElementById("demo").innerHTML =
"Available Screen Width: " + screen.availWidth;
Result will be:
Available Screen Width: 1280
Try it Yourself
Window Screen Available Height
The screen.availHeight property returns the height of the visitor's screen, in pixels, minus interface features like the Windows Taskbar.
Example
Display the available height of the screen in pixels:
document.getElementById("demo").innerHTML =
"Available Screen Height: " + screen.availHeight;
Result will be:
Available Screen Height: 772
Try it Yourself
Window Screen Color Depth
The screen.colorDepth property returns the number of bits used to display one color.
All modern computers use 24 bit or 32 bit hardware for color resolution:
Older computers used 16 bits: 65,536 different "High Colors" resolution.
Very old computers, and old cell phones used 8 bits: 256 different "VGA colors".
Example
Display the color depth of the screen in bits:
document.getElementById("demo").innerHTML =
"Screen Color Depth: " + screen.colorDepth;
Result will be:
Screen Color Depth: 24
Try it Yourself
The #rrggbb (rgb) values used in HTML represents "True Colors" (16,777,216 different colors)
Window Screen Pixel Depth
The screen.pixelDepth property returns the pixel depth of the screen.
Example
Display the pixel depth of the screen in bits:
document.getElementById("demo").innerHTML =
"Screen Pixel Depth: " + screen.pixelDepth;
Result will be:
Screen Pixel Depth: 24
Try it Yourself
For modern computers, Color Depth and Pixel Depth are equal.