Not quite, I'd say that SignalR is comparable to Phoenix Channels. It's a communication protocol that can use different transport protocols, Websockets being one of them.
LiveView builds on top of Phoenix Sockets. When the page is loaded for the first time, it starts a lightweight server-side process on the BEAM VM. This long-lived process renders the HTML template (which can consist of multiple SPA-style components) and keeps all of the relevant "props" (called assigns) in-memory.
Every time a new event is received, either client-side (e.g. button click) or server-side (typically via a PubSub subscription), that long-running process will update its assigns (props) to reflect the new state. The framework then intelligently re-renders parts of the HTML template which depend on those modified assigns, and sends a minimal HTML diff to the client.
All of this can be done without writing any custom JS. Basic client-side events are usually set up with special HTML attributes like `phx-click=my_custom_event` and automatically wired up by LiveView JS bundle to be received by that long-running process.
LiveView builds on top of Phoenix Sockets. When the page is loaded for the first time, it starts a lightweight server-side process on the BEAM VM. This long-lived process renders the HTML template (which can consist of multiple SPA-style components) and keeps all of the relevant "props" (called assigns) in-memory.
Every time a new event is received, either client-side (e.g. button click) or server-side (typically via a PubSub subscription), that long-running process will update its assigns (props) to reflect the new state. The framework then intelligently re-renders parts of the HTML template which depend on those modified assigns, and sends a minimal HTML diff to the client.
All of this can be done without writing any custom JS. Basic client-side events are usually set up with special HTML attributes like `phx-click=my_custom_event` and automatically wired up by LiveView JS bundle to be received by that long-running process.