Investigate the options for recursively processing directories

[acdha]

There is currently no standard way to handle directories.

Chrome:

• The File API: Directories and System spec has stalled in the standards track but has been implemented in Chrome 21+ and Opera since the Blink switch

Mozilla: unsupported

• https://bugzilla.mozilla.org/show_bug.cgi?id=876480 suggests https://w3c.github.io/filesystem-api/Overview.html may lead to a solution
• Mozilla is now implementing Microsoft's much simpler proposal: https://bugzilla.mozilla.org/show_bug.cgi?id=1164310

IE: unsupported but under development

• https://status.modern.ie/draganddropdirectories
• https://wpdev.uservoice.com/forums/257854-internet-explorer-platform/suggestions/6261304-drag-and-drop-directories
• https://lists.w3.org/Archives/Public/public-webapps/2015AprJun/0245.html and simplified proposal: https://microsoftedge.github.io/directory-upload/proposal.html

[acdha]

All HTML5 browsers have perfectly usable support for file drag and drop. Only Chrome has any support for this involving nested directory contents.

I'm wondering whether we could do something like adding a separate drop target which would create a new folder for the contents to have at least some support on current Firefox/IE.

Currently using Amazon Cloud Drive in any browser other than Chrome looks familiar:

[acdha]

Updated with the note that Mozilla is charging ahead with the simple Microsoft proposal:

https://bugzilla.mozilla.org/show_bug.cgi?id=1164310

[acdha]

@eikeon https://bugzilla.mozilla.org/show_bug.cgi?id=1258489 is now in the pipeline for Firefox 50, and should be available in the developer builds now