Function tauri::execute_promise_sync

pub fn execute_promise_sync<T: 'static, R: Serialize, F: FnOnce() -> Result<R> + Send + 'static>(
    webview: &mut WebView<T>, 
    task: F, 
    callback: String, 
    error: String
) -> Result<()>

Synchronously executes the given task and evaluates its Result to the JS promise described by the callback and error function names.