Import stickers to Whatsapp from WebApp?

[piscespieces]

Relates to this issue opened 4 years ago.

Have anyone found a way to import stickers to Whatsapp without the need of a Mobile App? i.e: from Web App?

This comment seems like "the way" but not sure if it works and even if it works I'm not able to define what's PasteCoder and URL provided as example does not work.

Copying plain text will work via PasteCoder which can coerce the UTI type (not MIME type specified in DataTransfer.setData(format, data)) to net.whatsapp.third-party.sticker-pack, as demoed at http://timtim.hk/wastickers.deprecated/
When you have the JSON in the right UTI type, opening whatsapp://stickerPack will work.