How to pull websocket server from AJAX request?

Question

Flask

I am making an AJAX request.
Pre-opened a Websocket connection (on the server running a websocket server in parallel)
On the server side, this AJAX, when executed, must periodically send some data to the Browser. Decided to send them via websocket. But how to interact with websocket server from AJAX code to send this periodic data?
Backend Python Flask