how to coppy clipboard on web

Hello
I write code for coppy clipboard on web app :

dim c As New Clipboard
c.Text = self.TextField2.Text
c.Close

but error

I’m not sure Clipboard is support in web App ?

Maybe check this: https://forum.xojo.com/7409-putting-data-in-client-clipboard

Im not understand

It’s not possible on web without using some other, non built-in means.