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This is an experimental technology
Check 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. 


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.


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

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) 39.0 (39.0) 6 (Yes) (Yes)
Redefined from long to double 56 ? ? ? ? ?
Feature Android Webview Chrome for Android Edge Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) (Yes) (Yes) 43.0 (43.0) ? ? ?
Redefined from long to double 56 56 ? ? ? ? ?

See also

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Last updated by: JonMarkPerry,