Load page javascript with a request (Simulating with Jmeter)

I want to perform a workload test on my website.

Goal is to simulate 2000 simultaneous users that log in into my website in the same minutes.

When a client loads the page, my client script must run some functionalities.

So I kind of want to run the javascript of the client.

Is this doable and if so, do you guys have any suggestions?