Web live view in the IDE and selector in that same tab

Live view

With the title I mean the function it currently other IA IDE which is the fact of being able to open a live view of the web is react astro or whatever in the same IDE.

Edit un Live view

And the other what I mean is that in that same tab you can for example select a

And that he knows that this is the div of which I speak and follow the style of my website when for example I tell you a button