This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The DataTransfer.mozUserCancelled property is used in the dragend event handler to determine if the user canceled the drag or not. If the user canceled the event, the property returns true and returns false otherwise. This property only applies to the dragend event.

Note: This property is Gecko-specific.

This property is Read only .



Return value

A Boolean representing true if the user canceled the drag event and returns false otherwise.


This example shows the use of the mozUserCancelled property in the dragend event handler.

function dragend_handler(event)
  var dragData = event.dataTransfer;
  console.log("mozUserCancelled = " + dragData.mozUserCancelled);


This property is not defined in any Web standard.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support No No Yes No No No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support No No No ? No No No

See also

Document Tags and Contributors

Contributors to this page: fscholz, rolfedh, AFBarstow
Last updated by: fscholz,