JS.push() events go client --> server and you handle them in LiveView.handle_event/3 or LiveComponent.handle_event/3. You use the :target option to pick where the event is sent. You can target specifically a LiveComponent or you can target any DOM node with a query selector.
For instance in a LiveComponent, you might have something like the following:
<button phx-click={JS.push("clicked", target: @myself)}>click me!</button>
but you could also have for instance an id selector:
<button phx-click={JS.push("clicked", target: "#my-element")}>click me!</button>
In the second case the event will go to the LiveView containing an element #my-element.
Hope that helps!
