event

The event system allows you to emit events to the backend and listen to events from it.

Enumerations

TauriEvent

Enumeration Members

DRAG_DROP

DRAG_DROP: "tauri://drag-drop";

DRAG_ENTER

DRAG_ENTER: "tauri://drag-enter";

DRAG_LEAVE

DRAG_LEAVE: "tauri://drag-leave";

DRAG_OVER

DRAG_OVER: "tauri://drag-over";

WEBVIEW_CREATED

WEBVIEW_CREATED: "tauri://webview-created";

WINDOW_BLUR

WINDOW_BLUR: "tauri://blur";

WINDOW_CLOSE_REQUESTED

WINDOW_CLOSE_REQUESTED: "tauri://close-requested";

WINDOW_CREATED

WINDOW_CREATED: "tauri://window-created";

WINDOW_DESTROYED

WINDOW_DESTROYED: "tauri://destroyed";

WINDOW_FOCUS

WINDOW_FOCUS: "tauri://focus";

WINDOW_MOVED

WINDOW_MOVED: "tauri://move";

WINDOW_RESIZED

WINDOW_RESIZED: "tauri://resize";

WINDOW_SCALE_FACTOR_CHANGED

WINDOW_SCALE_FACTOR_CHANGED: "tauri://scale-change";

WINDOW_THEME_CHANGED

WINDOW_THEME_CHANGED: "tauri://theme-changed";

Interfaces

Event<T>

Type Parameters

Type Parameter
T

Properties

Property	Type	Description	Defined in
event	EventName	Event name
id	number	Event identifier used to unlisten
payload	T	Event payload

---

Options

Properties

Property	Type	Description	Defined in
target?	string | EventTarget	The event target to listen to, defaults to { kind: 'Any' }, see EventTarget. If a string is provided, EventTarget.AnyLabel is used.

Type Aliases

EventCallback()<T>

type EventCallback<T>: (event) => void;

Type Parameters

Type Parameter
T

Parameters

Parameter	Type
event	Event<T>

Returns

void

---

EventName

type EventName: `${TauriEvent}` | string & Record<never, never>;

---

EventTarget

type EventTarget:
  | object
  | object
  | object
  | object
  | object
  | object;

---

UnlistenFn()

type UnlistenFn: () => void;

Returns

void

Functions

emit()

function emit<T>(event, payload?): Promise<void>

Emits an event to all targets.

Type Parameters

Type Parameter
T

Parameters

Parameter	Type	Description
event	string	Event name. Must include only alphanumeric characters, -, /, : and _.
payload?	T	Event payload.

Returns

Promise<void>

Example

import { emit } from '@crabnebula/taurify-api/event';
await emit('frontend-loaded', { loggedIn: true, token: 'authToken' });

---

emitTo()

function emitTo<T>(
   target,
   event,
payload?): Promise<void>

Emits an event to all targets matching the given target.

Type Parameters

Type Parameter
T

Parameters

Parameter	Type	Description
target	string | EventTarget	Label of the target Window/Webview/WebviewWindow or raw EventTarget object.
event	string	Event name. Must include only alphanumeric characters, -, /, : and _.
payload?	T	Event payload.

Returns

Promise<void>

Example

import { emitTo } from '@crabnebula/taurify-api/event';
await emitTo('main', 'frontend-loaded', { loggedIn: true, token: 'authToken' });

---

listen()

function listen<T>(
   event,
   handler,
options?): Promise<UnlistenFn>

Listen to an emitted event to any target.

Type Parameters

Type Parameter
T

Parameters

Parameter	Type	Description
event	EventName	Event name. Must include only alphanumeric characters, -, /, : and _.
handler	EventCallback<T>	Event handler callback.
options?	Options	Event listening options.

Returns

Promise<UnlistenFn>

A promise resolving to a function to unlisten to the event. Note that removing the listener is required if your listener goes out of scope e.g. the component is unmounted.

Example

import { listen } from '@crabnebula/taurify-api/event';
const unlisten = await listen<string>('error', (event) => {
  console.log(`Got error, payload: ${event.payload}`);
});

// you need to call unlisten if your handler goes out of scope e.g. the component is unmounted
unlisten();

---

once()

function once<T>(
   event,
   handler,
options?): Promise<UnlistenFn>

Listens once to an emitted event to any target.

Type Parameters

Type Parameter
T

Parameters

Parameter	Type	Description
event	EventName	Event name. Must include only alphanumeric characters, -, /, : and _.
handler	EventCallback<T>	Event handler callback.
options?	Options	Event listening options.

Returns

Promise<UnlistenFn>

A promise resolving to a function to unlisten to the event. Note that removing the listener is required if your listener goes out of scope e.g. the component is unmounted.

Example

import { once } from '@crabnebula/taurify-api/event';
interface LoadedPayload {
  loggedIn: boolean,
  token: string
}
const unlisten = await once<LoadedPayload>('loaded', (event) => {
  console.log(`App is loaded, loggedIn: ${event.payload.loggedIn}, token: ${event.payload.token}`);
});

// you need to call unlisten if your handler goes out of scope e.g. the component is unmounted
unlisten();