screen.width

Returns the width of the screen.

Syntax

lWidth = window.screen.width

Example

// crude way to check that the screen is at least 1024x768
if (window.screen.width >= 1024 && window.screen.height >= 768) {
  // resolution is 1024x768 or above
}

Notes

Note that not all of the width given by this property may be available to the window itself. When other widgets occupy space that cannot be used by the window object, there is a difference in window.screen.width and window.screen.availWidth. See also screen.height.

Internet Explorer will take into account the zoom setting when reporting the screen width. It will only return the real width of the screen if the zoom is set to 100%.

Specification

Browser compatibilityUpdate compatibility data on GitHub