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This feature is not on a current W3C standards track, but it is supported on the Firefox OS platform. Although implementations may change in the future and it is not supported widely across browsers, it is suitable for use in code dedicated to Firefox OS apps.

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


The DeviceStorageChangeEvent provides information about any change made to a file inside a given storage area. It extends the Event interface.

The change event is triggered each time a file is created, modified, or deleted from the device storage system.


DeviceStorageChangeEvent.path Read only
A string giving the full path of the file affected by the change.
DeviceStorageChangeEvent.reason Read only
A string giving the reason of the change. Possible values are created, modified, or deleted.


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

sdcard.addEventListener("change", function (event) {
  var reason = event.reason;
  var path   = event.path;

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


Not part of any specification.

See also


Contributors to this page: fscholz, Jeremie, teoli, kscarfone, MHasan
最終更新者: fscholz,