Tauri State & Events
Shared State
use std::sync::Mutex;
use tauri::State;
struct AppState { counter: Mutex<i32> }
#[tauri::command]
fn increment(state: State<AppState>) -> i32 {
let mut c = state.counter.lock().unwrap();
*c += 1; *c
}
// Register: .manage(AppState { counter: Mutex::new(0) })
Events (Rust → Frontend)
use tauri::{AppHandle, Emitter};
#[tauri::command]
async fn long_task(app: AppHandle) {
for i in 0..100 {
app.emit("progress", i).unwrap();
tokio::time::sleep(std::time::Duration::from_millis(50)).await;
}
}
import { listen } from "@tauri-apps/api/event";
await listen<number>("progress", (e) => console.log(e.payload));
Error Handling
#[tauri::command]
fn risky_op() -> Result<String, String> {
Err("Something failed".into()) // Reaches frontend as error
}
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