Firefox 3.6 has new features from HTML5's File API. This makes it
example, that means showing thumbnails prior to uploading files is now
According to the draft HTML5 File
API, browsers should provide
There are API docs for FileReader on Mozilla's developer
Mozilla also has a document called Using files from web
with example code for uploading files. Although they mention generating
thumbnails their example doesn't do any image processing -- it's
expected that an implementor would use CSS to create thumbnails to
display before and during the upload process.
Since the File API is asynchronous, files could be loaded and processed
in the background while the user does other things. This could also be
useful for creating web applications that work offline.