This API is available on Firefox OS for internal applications only.
Summary
The ondataerror property specifies an event listener to receive dataerror events. These events occur whenever the MozMobileConnection.data connection object receives an error from the RIL.
Note: MozMobileConnection inherits from the EventTarget interface, so it's also possible to listen for events by using the addEventListener() method.
Syntax
navigator.mozMobileConnection.ondataerror = funcRef;
Where funcRef is a function to be called when the dataerror event occurs.
Specification
Not part of any specification.