webview

Provides APIs to create webviews, communicate with other webviews and manipulate the current webview.

Webview events

Events can be listened to using Webview.listen:

import { getCurrentWebview } from "@crabnebula/taurify-api/webview";
getCurrentWebview().listen("my-webview-event", ({ event, payload }) => { });

References

Classes

Webview

Create new webview or get a handle to an existing one.

Webviews are identified by a label a unique identifier that can be used to reference it later. It may only contain alphanumeric characters a-zA-Z plus the following special characters -, /, : and _.

Example

import { Window } from "@crabnebula/taurify-api/window"
import { Webview } from "@crabnebula/taurify-api/webview"

const appWindow = new Window('uniqueLabel');

// loading embedded asset:
const webview = new Webview(appWindow, 'theUniqueLabel', {
  url: 'path/to/page.html'
});
// alternatively, load a remote URL:
const webview = new Webview(appWindow, 'theUniqueLabel', {
  url: 'https://github.com/tauri-apps/tauri'
});

webview.once('tauri://created', function () {
 // webview successfully created
});
webview.once('tauri://error', function (e) {
 // an error happened creating the webview
});

// emit an event to the backend
await webview.emit("some-event", "data");
// listen to an event from the backend
const unlisten = await webview.listen("event-name", e => {});
unlisten();

Extended by

WebviewWindow

Constructors

new Webview()

new Webview(
   window,
   label,
   options): Webview

Creates a new Webview.

Parameters

Parameter	Type	Description
`window`	`Window`	the window to add this webview to.
`label`	`string`	The unique webview label. Must be alphanumeric: `a-zA-Z-/:_`.
`options`	`WebviewOptions`	-

Returns

Webview

The Webview instance to communicate with the webview.

Example

import { Window } from '@crabnebula/taurify-api/window'
import { Webview } from '@crabnebula/taurify-api/webview'
const appWindow = new Window('my-label')
const webview = new Webview(appWindow, 'my-label', {
  url: 'https://github.com/tauri-apps/tauri'
});
webview.once('tauri://created', function () {
 // webview successfully created
});
webview.once('tauri://error', function (e) {
 // an error happened creating the webview
});

Properties

Property	Type	Description
`label`	`string`	The webview label. It is a unique identifier for the webview, can be used to reference it later.
`listeners`	`Record`<`string`, `EventCallback`<`any`>[]>	Local event listeners.
`window`	`Window`	The window hosting this webview.

Methods

clearAllBrowsingData()

clearAllBrowsingData(): Promise<void>

Clears all browsing data for this webview.

Returns

Promise<void>

A promise indicating the success or failure of the operation.

Example

import { getCurrentWebview } from '@crabnebula/taurify-api/webview';
await getCurrentWebview().clearAllBrowsingData();

close()

close(): Promise<void>

Closes the webview.

Returns

Promise<void>

A promise indicating the success or failure of the operation.

Example

import { getCurrentWebview } from '@crabnebula/taurify-api/webview';
await getCurrentWebview().close();

emit()

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

Emits an event to all targets.

Parameters

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

Returns

Promise<void>

Example

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

emitTo()

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

Emits an event to all targets matching the given target.

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`?	`unknown`	Event payload.

Returns

Promise<void>

Example

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

hide()

hide(): Promise<void>

Hide the webview.

Returns

Promise<void>

A promise indicating the success or failure of the operation.

Example

import { getCurrentWebview } from '@crabnebula/taurify-api/webview';
await getCurrentWebview().hide();

listen()

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

Listen to an emitted event on this webview.

Type Parameters

Type Parameter
`T`

Parameters

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

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

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

once()

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

Listen to an emitted event on this webview only once.

Type Parameters

Type Parameter
`T`

Parameters

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

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 { getCurrentWebview } from '@crabnebula/taurify-api/webview';
const unlisten = await getCurrent().once<null>('initialized', (event) => {
  console.log(`Webview initialized!`);
});

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

onDragDropEvent()

onDragDropEvent(handler): Promise<UnlistenFn>

Listen to a file drop event. The listener is triggered when the user hovers the selected files on the webview, drops the files or cancels the operation.

Parameters

Parameter	Type
`handler`	`EventCallback`<`DragDropEvent`>

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 { getCurrentWebview } from "@crabnebula/taurify-api/webview";
const unlisten = await getCurrentWebview().onDragDropEvent((event) => {
 if (event.payload.type === 'over') {
   console.log('User hovering', event.payload.position);
 } else if (event.payload.type === 'drop') {
   console.log('User dropped', event.payload.paths);
 } else {
   console.log('File drop cancelled');
 }
});

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

When the debugger panel is open, the drop position of this event may be inaccurate due to a known limitation. To retrieve the correct drop position, please detach the debugger.

position()

position(): Promise<PhysicalPosition>

The position of the top-left hand corner of the webview’s client area relative to the top-left hand corner of the desktop.

Returns

Promise<PhysicalPosition>

The webview’s position.

Example

import { getCurrentWebview } from '@crabnebula/taurify-api/webview';
const position = await getCurrentWebview().position();

reparent()

reparent(window): Promise<void>

Moves this webview to the given label.

Parameters

Parameter	Type
`window`	`string` \| `Window` \| `WebviewWindow`

Returns

Promise<void>

A promise indicating the success or failure of the operation.

Example

import { getCurrentWebview } from '@crabnebula/taurify-api/webview';
await getCurrentWebview().reparent('other-window');

setBackgroundColor()

setBackgroundColor(color): Promise<void>

Specify the webview background color.

Platfrom-specific:

macOS / iOS: Not implemented.
Windows:
- On Windows 7, transparency is not supported and the alpha value will be ignored.
- On Windows higher than 7: translucent colors are not supported so any alpha value other than 0 will be replaced by 255

Parameters

Parameter	Type
`color`	`null` \| `Color`

Returns

Promise<void>

A promise indicating the success or failure of the operation.

setFocus()

setFocus(): Promise<void>

Bring the webview to front and focus.

Returns

Promise<void>

A promise indicating the success or failure of the operation.

Example

import { getCurrentWebview } from '@crabnebula/taurify-api/webview';
await getCurrentWebview().setFocus();

setPosition()

setPosition(position): Promise<void>

Sets the webview position.

Parameters

Parameter	Type	Description
`position`	`LogicalPosition` \| `PhysicalPosition` \| `Position`	The new position, in logical or physical pixels.

Returns

Promise<void>

A promise indicating the success or failure of the operation.

Example

import { getCurrent, LogicalPosition } from '@crabnebula/taurify-api/webview';
await getCurrentWebview().setPosition(new LogicalPosition(600, 500));

setSize()

setSize(size): Promise<void>

Resizes the webview.

Parameters

Parameter	Type	Description
`size`	`LogicalSize` \| `PhysicalSize` \| `Size`	The logical or physical size.

Returns

Promise<void>

A promise indicating the success or failure of the operation.

Example

import { getCurrent, LogicalSize } from '@crabnebula/taurify-api/webview';
await getCurrentWebview().setSize(new LogicalSize(600, 500));

setZoom()

setZoom(scaleFactor): Promise<void>

Set webview zoom level.

Parameters

Parameter	Type
`scaleFactor`	`number`

Returns

Promise<void>

A promise indicating the success or failure of the operation.

Example

import { getCurrentWebview } from '@crabnebula/taurify-api/webview';
await getCurrentWebview().setZoom(1.5);

show()

show(): Promise<void>

Show the webview.

Returns

Promise<void>

A promise indicating the success or failure of the operation.

Example

import { getCurrentWebview } from '@crabnebula/taurify-api/webview';
await getCurrentWebview().show();

size()

size(): Promise<PhysicalSize>

The physical size of the webview’s client area. The client area is the content of the webview, excluding the title bar and borders.

Returns

Promise<PhysicalSize>

The webview’s size.

Example

import { getCurrentWebview } from '@crabnebula/taurify-api/webview';
const size = await getCurrentWebview().size();

getAll()

static getAll(): Promise<Webview[]>

Gets a list of instances of Webview for all available webviews.

Returns

Promise<Webview[]>

getByLabel()

static getByLabel(label): Promise<null | Webview>

Gets the Webview for the webview associated with the given label.

Parameters

Parameter	Type	Description
`label`	`string`	The webview label.

Returns

Promise<null | Webview>

The Webview instance to communicate with the webview or null if the webview doesn’t exist.

Example

import { Webview } from '@crabnebula/taurify-api/webview';
const mainWebview = Webview.getByLabel('main');

getCurrent()

static getCurrent(): Webview

Get an instance of Webview for the current webview.

Property	Type	Description
`acceptFirstMouse?`	`boolean`	Whether clicking an inactive webview also clicks through to the webview on macOS.
`backgroundColor?`	`Color`	Set the window and webview background color. #### Platform-specific: - macOS / iOS: Not implemented. - Windows: - On Windows 7, alpha channel is ignored. - On Windows 8 and newer, if alpha channel is not `0`, it will be ignored.
`devtools?`	`boolean`	Whether web inspector, which is usually called browser devtools, is enabled or not. Enabled by default. This API works in debug builds, but requires `devtools` feature flag to enable it in release builds. #### Platform-specific - macOS: This will call private functions on macOS. - Android: Open `chrome://inspect/#devices` in Chrome to get the devtools window. Wry’s `WebView` devtools API isn’t supported on Android. - iOS: Open Safari > Develop > [Your Device Name] > [Your WebView] to get the devtools window.
`dragDropEnabled?`	`boolean`	Whether the drag and drop is enabled or not on the webview. By default it is enabled. Disabling it is required to use HTML5 drag and drop on the frontend on Windows.
`focus?`	`boolean`	Whether the webview should have focus or not Since 2.1.0
`height`	`number`	The initial height.
`incognito?`	`boolean`	Whether or not the webview should be launched in incognito mode. #### Platform-specific - Android: Unsupported.
`proxyUrl?`	`string`	The proxy URL for the WebView for all network requests. Must be either a `http://` or a `socks5://` URL. #### Platform-specific - macOS: Requires the `macos-proxy` feature flag and only compiles for macOS 14+.
`transparent?`	`boolean`	Whether the webview is transparent or not. Note that on `macOS` this requires the `macos-private-api` feature flag, enabled under `tauri.conf.json > app > macOSPrivateApi`. WARNING: Using private APIs on `macOS` prevents your application from being accepted to the `App Store`.
`url?`	`string`	Remote URL or local file path to open. - URL such as `https://github.com/tauri-apps` is opened directly on a Tauri webview. - data: URL such as `data:text/html,<html>...` is only supported with the `webview-data-url` Cargo feature for the `tauri` dependency. - local file path or route such as `/path/to/page.html` or `/users` is appended to the application URL (the devServer URL on development, or `tauri://localhost/` and `https://tauri.localhost/` on production).
`useHttpsScheme?`	`boolean`	Sets whether the custom protocols should use `https://<scheme>.localhost` instead of the default `http://<scheme>.localhost` on Windows and Android. Defaults to `false`. #### Note Using a `https` scheme will NOT allow mixed content when trying to fetch `http` endpoints and therefore will not match the behavior of the `<scheme>://localhost` protocols used on macOS and Linux. #### Warning Changing this value between releases will change the IndexedDB, cookies and localstorage location and your app will not be able to access them. Since 2.1.0
`userAgent?`	`string`	The user agent for the webview.
`width`	`number`	The initial width.
`x`	`number`	The initial vertical position.
`y`	`number`	The initial horizontal position.
`zoomHotkeysEnabled?`	`boolean`	Whether page zooming by hotkeys is enabled #### Platform-specific: - Windows: Controls WebView2’s `IsZoomControlEnabled` setting. - MacOS / Linux: Injects a polyfill that zooms in and out with `ctrl/command` + `-/=`, 20% in each step, ranging from 20% to 1000%. Requires `webview:allow-set-webview-zoom` permission - Android / iOS: Unsupported.

Functions

getAllWebviews()

function getAllWebviews(): Promise<Webview[]>

Gets a list of instances of Webview for all available webviews.

Returns

Promise<Webview[]>

getCurrentWebview()

function getCurrentWebview(): Webview

Get an instance of Webview for the current webview.

Returns

Webview