W3cubDocs

/DOM

HTMLElement.offsetWidth

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 compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	?	Yes	1	Yes	?	?