communication between two webapplications using websockets

Hello,
I am new to JavaScript and webapplication.
I am trying to test some of the tools that allow communication between two webapplications.
The first webapp asks users for some inputs.
The second webapp executes some functions and updates the rendering of the page.

I want that the first webapp transmits its data to the other webapp but without the need for a server in the middle (client-to-client communication).

Is it possible to do this by applying the websockets?
Is it possible to consider a certain webapp as a server and the other as a client?

Thank you for your help,
Mira