FileHandle.onerror
Non-standard: 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.
Summary
Specifies an event listener to receive error events. These events occur when something goes wrong.
Syntax
instanceOfFileHandle.onerror = funcRef;
Where funcRef is a function to be called when the error event occurs.
Specifications
This feature is not part of any current specification. It is no longer on track to become a standard.