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Returns the width of the screen.


lWidth = window.screen.width


// 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


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 window.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 Status Comment
CSS Object Model (CSSOM) View Module
The definition of 'Screen.width' in that specification.
Working Draft  

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support (Yes) (Yes) (Yes) 6 (Yes) (Yes)
Feature Android Android Webview Edge Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support ? ? (Yes) (Yes) (Yes) ? ? ? (Yes)

Document Tags and Contributors

 Contributors to this page: efskap, abbycar, cvrebert, teoli, Prachi_Dighe, ethertank, Sheppy, Gieron, Mgjbot, Gor1
 Last updated by: efskap,