Web/API/MouseEvent/offsetX

This is an experimental technologyCheck the Browser compatibility table carefully before using this in production.

The offsetX read-only property of the MouseEvent interface provides the offset in the X coordinate of the mouse pointer between that event and the padding edge of the target node.

Syntax

var xOffset = instanceOfMouseEvent.offsetX;

Return value

A double floating point value. Early versions of the spec defined this as an integer. See the Browser compatibility section for details.

Specifications

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

Browser compatibility

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
`offsetX` Experimental'	Chrome Full support Yes	Edge Full support 12	Firefox Full support 39	IE Full support 9	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 43	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
Value type changed from `long` to `double`	Chrome Full support 56	Edge Full support ≤79	Firefox ?	IE ?	Opera ?	Safari ?	WebView Android Full support 56	Chrome Android Full support 56	Firefox Android ?	Opera Android ?	Safari iOS ?	Samsung Internet Android Full support 6.0

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.