Enable paste image from clipboard(copy image)

[blueBlue0102]

Environment: windows 10, chrome 90

I had made some modification in dropzone.js to enable paste image from clipboard
(but directly "copy paste" the file would not work)

see the change:
blueBlue0102@38576a0

---

But I have a question:

In dropzone.js, it mentions:

This is disabled right now, because the browsers don't implement it properly.
// "paste": (e) =>
//     noPropagation e
//     @paste e

I want to know the explanation of "browsers don't implement it properly".
Because after modify it, it looks working fine on my environment.