Web/API/Screen/width

The Screen.width read-only property returns the width of the screen in pixels.

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

Specification	Status	Comment
CSS Object Model (CSSOM) View ModuleThe definition of 'Screen.width' in that specification.	Working Draft	Initial definition.

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
width	Chrome Full support 40	Edge Full support 12	Firefox Full support Yes	IE ?	Opera Full support Yes	Safari Full support 6	WebView Android Full support 40	Chrome Android Full support 40	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support 4.0

Legend

Full support  

Full support

Compatibility unknown  

Compatibility unknown

Screen.width by Mozilla Contributors is licensed under CC-BY-SA 2.5.