Question: What File and Directory Entries API features aren’t supported in mobile?

[sideshowbarker]

What File and Directory Entries API features aren’t supported in mobile?

I’m updating https://github.com/mdn/browser-compat-data for File and Directory Entries API features and am wondering what support to indicate for Chrome for Android and for iOS Safari.

In trying the test cases in https://wpt.live/entries-api/ I don’t see a way to run most of them on mobile — because they rely on doing drag-and-drop into the browser window, and I don’t know of any way to actually drag something from the browser window.

So I dunno maybe DataTransferItem.prototype.webkitGetAsEntry() could be considered as not supported on mobile? I mean just because of the platform not exposing any way to do drag and drop into a browser window?

But looking at the https://caniuse.com/#feat=input-file-directory Can I Use page, I see it shows the webkitdirectory content attribute as not supported in iOS Safari or Chrome for Android.

Maybe that’s because neither platform’s file picker has a way to actually select a directory/folder?

I know that when I try the https://wpt.live/entries-api/file-webkitRelativePath-manual.html test case in Chrome for Android and iOS Safari, I do see that the platform file pickers don’t seem to provide any way to select directories/folders.

On the other hand, the underlying browser engines on both Chrome for Android and iOS Safari do implement and expose the relevant APIs defined in this spec — so the browser-engine support is there in those engines. And so if the platform ever were to change in a way that enabled drag-and-drop into a browser window and that exposed directory-selecting in the file picker, then things would already just work as expected, I guess?

So given all that, I’m not sure for https://github.com/mdn/browser-compat-data what’s best to indicate about mobile-browser support for features in this spec.