This article needs a technical review. How you can help.

This API is available on Firefox OS for privileged or certified applications only.


The onchange property is used to specify an event handler to receive change events. Those events are triggered each time a file is created, modified, or deleted on the storage area.


instanceOfDeviceStorage.onchange = funcRef

Where funcRef is a function to be called when the change event occurs. These events are of type DeviceStorageChangeEvent.


var sdcard = navigator.getDeviceStorage('sdcard');

sdcard.onchange = function (change) {
  var reason = change.reason;
  var path   = change.path;

  console.log('The file "' + path + '" has been ' + reason);


Not part of any specification.

See also

Document Tags and Contributors

 Contributors to this page: chrisdavidmills, fscholz, jsx, kscarfone, Jeremie
 Last updated by: chrisdavidmills,