Don't dialogs work at web version?

I tried to use a few dialogs like prompt text, pick value (Android Style), pick date and pick time.
But all of them are not shown at the web preview. Is this a bug? Or did they also don’t work in finished built?
And if they are not supported, will you support them in future at web?

Raised this one a while ago and it’s been marked as planned. Feel free to upvote.

ahh ok, thanks. A still can’t login to Everytime error, no matter which browser. Don’t know why.