The HTMLElement.offsetWidth read-only property returns the layout width of an element as an integer.

Typically, offsetWidth is a measurement in pixels of the element's CSS width, including any borders, padding, and vertical scrollbars (if rendered). It does not include the width of pseudo-elements such as ::before or ::after.

If the element is hidden (for example, by setting style.display on the element or one of its ancestors to "none"), then 0 is returned.

Syntax

var intElemOffsetWidth = element.offsetWidth;

intElemOffsetWidth is a variable storing an integer corresponding to the offsetWidth pixel value of the element. The offsetWidth property is a read-only.

This property will round the value to an integer. If you need a fractional value, use element.getBoundingClientRect().

Example

Image:Dimensions-offset.png

Specification

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

Notes

offsetWidth is a property of the DHTML object model which was first introduced by MSIE. It is sometimes referred to as an element's physical/graphical dimensions, or an element's border-box width.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic support
Experimental
Chrome ? Edge Full support YesFirefox Full support 1IE Full support YesOpera ? Safari ? WebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support 4Opera Android ? Safari iOS ? Samsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.

See also

Document Tags and Contributors

Last updated by: mfluehr,