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JS Graphics
JS Screen
Window Screen
The window. screen object are written without the window prefix.
Properties:
screen. width
screen.height
screen.availWidth
screen.availHeight
screen.colorDepth
screen.pixelDepth
Window Screen Width
The screen.width property is used to return the width of the visitor’s screen in pixels.
Example
<!DOCTYPE html>
<html>
<body>
<p id=”demo”></p>
<script>
document.getElementById(“demo”).innerHTML =
“Screen width is ” + screen.width;
</script>
</body>
</html>
Output
Window Screen Height
The screen.height property is used to return the height of the visitor’s screen in pixels.
Example
<!DOCTYPE html>
<html>
<body>
<p id=”demo”></p>
<script>
document.getElementById(“demo”).innerHTML =
“Screen height is ” + screen.height;
</script>
</body>
</html>
Output
Window Screen Available Width
The screen.availWidth property is used to return the width of the visitor’s screen, in pixels, minus interface features like the Windows Taskbar.
Example
<!DOCTYPE html>
<html>
<body>
<p id=”demo”></p>
<script>
document.getElementById(“demo”).innerHTML =
“Available screen width is ” + screen.availWidth;
</script>
</body>
</html>
Output
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
<!DOCTYPE html>
<html>
<body>
<p id=”demo”></p>
<script>
document.getElementById(“demo”).innerHTML =
“Available screen height is ” + screen.availHeight;
</script>
</body>
</html>
Output
Window Screen Color Depth
The screen.colorDepth property is used to return the number of bits used to display single 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 used 16 bits: 65,536 different “High Colors” resolution.
Very old computers and old cell phones made use of 8 bits: 256 different “VGA color”.
Example
Display the color depth of the screen in bits.
<!DOCTYPE html>
<html>
<body>
<p id=”demo”></p>
<script>
document.getElementById(“demo”).innerHTML =
“Screen color depth is ” + screen.colorDepth;
</script>
</body>
</html>
Output
Window Screen Pixel Depth
The screen.pixelDepth property returns the pixel depth of the screen.
Example
<!DOCTYPE html>
<html>
<body>
<p id=”demo”></p>
<script>
document.getElementById(“demo”).innerHTML =
“Screen pixel depth is ” + screen.pixelDepth;
</script>
</body>
</html>
Output