BOM Screen(JavaScript Window Screen)

The window.screen object contains information about the user’s screen like width, height, pixels etc.


Window Screen

The window.screen object can be written without the window prefix.

Properties:

No.PropertyDescription
1widthTo return the width of the screen
2heightTo return the height of the screen
3availWidthTo return the available width
4availHeightTo return the available height
5colorDepthTo return the color depth
6pixelDepthTo return the pixel depth.

Window Screen Width

The screen.width returns the width of the user’s screen in pixels.

Example :- 
//Display the width of the screen in pixels:
document.getElementById("myDiv").innerHTML =
"Your Screen Width: " + screen.width;

Result :- 
Your Screen Width: 1366

Window Screen Height

The screen.height property returns the height of the user’s screen in pixels.

Example :- 
//Display the height of the screen in pixels:
document.getElementById("myDiv").innerHTML =
"Your Screen Height: " + screen.height;

Result :- 
Your Screen Height: 768

Window Screen Available Width

The screen.availWidth property returns the width of the user’s screen, in pixels, minus interface features like the Windows Taskbar.

Example :- 
//Display the available width of the screen in pixels:
document.getElementById("myDiv").innerHTML =
"Your Available Screen Width: " + screen.availWidth;

Result :- 
Your Available Screen Width: 1366

Window Screen Available Height

The screen.availHeight property returns the height of the user’s screen, in pixels, minus interface features like the Windows Taskbar.

Example :- 
//Display the available height of the screen in pixels:
document.getElementById("myDiv").innerHTML =
"Your Available Screen Height: " + screen.availHeight;

Result :- 
Your Available Screen Height: 728

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:

24 bits =      16,777,216 different “True Colors”

32 bits = 4,294,967,296 different “Deep Colors”

Older computers generally 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("myDiv").innerHTML =
"Your Screen Color Depth: " + screen.colorDepth;

Result :- 
Your Screen Color Depth: 24

Note:- 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 user’s screen.

Example :- 
// Display the pixel depth of the screen in bits:
document.getElementById("demo").innerHTML =
"Your Screen Pixel Depth: " + screen.pixelDepth;

Result :- 
Your Screen Pixel Depth: 24

Note:- For modern computers, Color Depth and Pixel Depth are equal.