FileHandle.type
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
Provides the mime type of the file.
Value
A string.
Specifications
This feature is not part of any current specification. It is no longer on track to become a standard.