Upload File[photo] from mobile with unity webgl

I know unity webgl for phone is not supported but is there anyway to upload file[photo] from unity webgl mobile? I try using this
https://forum.unity.com/threads/how-do-i-let-the-user-load-an-image-from-their-harddrive-into-a-webgl-app.380985/page-2

but it does not work on mobile . Any one can help?

Since there is no reply, I want update my progress.
By changing
unitycanvas.addEventListener(‘click’, OpenFileDialog, false);
to
unitycanvas.addEventListener(‘touchstart’, OpenFileDialog, false);
I am able to open the Upload dialog for mobile phone. But there is two other problem arise. The first one is I need to tap the button 3 times to make it works. second one is it doesn’t upload the file. If I am able to solve this problem I will try to post the answer.

The way this code works use you call GetImage.GetImageFromBrowserAsync. You pass it the name of a GameObject and the name of a method to call. The name of the GameObject MUST BE UNIQUE well, if it’s not unique Unity will attempt to call the method on every object with the same name
RealcompOnline