The Window.screenX read-only property returns the horizontal distance, in CSS pixels, of the left border of the user's browser from the left side of the screen.


lLoc = window.screenX 
  • lLoc is the number of CSS pixels from the left side the screen.


Specification Status Comment
CSS Object Model (CSSOM) View Module
The definition of 'Window.screenX' in that specification.
Working Draft Initial definition.

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) (Yes) [1] (Yes) (Yes) (Yes)
Feature Android Chrome for Android Edge Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) (Yes) (Yes) (Yes) [1] (Yes) (Yes) (Yes)

[1] Before Firefox 28, Gecko was using device pixels instead of CSS pixels; in other words, it was assuming a value of screenPixelsPerCSSPixel of 1 for any device.

See also

Document Tags and Contributors

 Contributors to this page: erikadoyle, sarafec, fscholz, teoli, Np, iamanupmenon, ethertank, Sheppy, Mgjbot, Dria, JesseW
 Last updated by: erikadoyle,