Internally it uses URL.createObjectURL and other internals to create a URI that
can be referenced by a DOM attribute (e.g. src of an img tag), and at the same
time retains some critical information about the file (e.g. its original name).
Parameters
file: File
a File object as obtained from an input element or a FileList
Creates a Blob URI from the given file.
Internally it uses
URL.createObjectURLand other internals to create a URI that can be referenced by a DOM attribute (e.g.srcof animgtag), and at the same time retains some critical information about the file (e.g. its original name).