calling-frontend-from-tauri-rust

Use AppHandle::emit with the Emitter trait to broadcast an event name and payload to all listeners. For specific webviews use emit_to with a window label, or emit_filter with an EventTarget closure for conditional targeting.

Use events for multi-consumer broadcasts and simple status updates with moderate throughput. Use IPC channels for high-throughput streaming to a single consumer, such as download progress or real-time data feeds.

Import listen from @tauri-apps/api/event and call it with the event name and a typed callback receiving event.payload. Store the returned unlisten function and call it during cleanup to prevent memory leaks.

Custom event payloads must implement both Serialize and Clone in Rust. Use serde attributes like rename_all = "camelCase" to keep field naming consistent between Rust structs and TypeScript types.

Yes, call webview.eval with a script string after retrieving the webview via app.get_webview_window. For complex data, serialize Rust structs with the serialize-to-javascript crate before embedding them in the script.

Listeners accumulate if you register them repeatedly without unlistening. Keep the unlisten handle returned by listen and invoke it when the component unmounts, or use once for one-time events.