the download attribute specifying the target
to be downloaded instead of being explored. By default, it is the
filename of the input file. The filename of the downloaded file can be
different from the input file if provided differently
link.text
the link text (the visible part of the hyperlink)
Value
a hyperlink in the form of: <a href="encoded base64 string"
download="download.attribute">"link.text"</a>