HTMLImageElement: isMap property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨July 2015⁩.

TheisMap property of theHTMLImageElement interface indicates that the image is part of aserver-side map. If so, the coordinates where the user clicked on the image are sent to the server. It reflects the<img> element'sismap content attribute. This attribute is allowed only if the<img> element is a descendant of an<a> element with a validhref attribute.

Note:For accessibility reasons, you should generally avoid using server-side image maps, as they require the use of a mouse. Use aclient-side image map instead.

Value

A Boolean value which istrue if the image is being used for a server-side image map; otherwise, the value isfalse.

Usage notes

When an image marked as being part of a server-side image map is clicked, the browser constructs the string "?x,y", where x and y indicate the coordinates at which the mouse was clicked as offsets from the top-left corner of the image, specified in CSS pixels.

The browser then fetches that URL from the server and displays or downloads it depending on the value of thedownload attribute.

Unlike server-side image maps, client-side image maps don't cause the<img> element to adopt interactive content mode.