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.
Obsolete
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.
The Navigator.msSaveOrOpenBlob() method saves the
File or Blob to disk. This method behaves in the same
way as Navigator.msSaveBlob() except that this enables the file open
option.
Syntax
navigator.msSaveOrOpenBlob(blob, defaultName);
Parameters
blob- A blob to be saved.
defaultName-
The file name to be used when saving file.
Return value
True is returned as long as the download notification bar is displayed, or false if a failure occurred.
Notes
When a site calls this method, the behavior is the same as when Windows Internet Explorer downloads a file with the following in the header:
Content-Length: <blob.size> Content-Type: <blob.type> Content-Disposition: attachment;filename=<defaultName>
Specifications
Not part of any specifications.