This API is available on Firefox OS for privileged or certified applications only.
Summary
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.
Syntax
instanceOfDeviceStorage.onchange = funcRef
Where funcRef is a function to be called when the change event occurs. These events are of type DeviceStorageChangeEvent.
Example
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);
}Specification
Not part of any specification.