core

Invoke your custom commands.

This package is also accessible with window.__TAURI__.core when app.withGlobalTauri in tauri.conf.json is set to true.

Classes

Channel<T>

Type Parameters

Type Parameter	Default type
T	unknown

Constructors

new Channel()

new Channel<T>(onmessage?): Channel<T>

Parameters

Parameter	Type
onmessage?	(response) => void

Returns

Channel<T>

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L87

Properties

Property	Type	Description	Defined in
id	number	The callback id returned from transformCallback	Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L79

Accessors

onmessage

get onmessage(): (response) => void

set onmessage(handler): void

Parameters

Parameter	Type
handler	(response) => void

Returns

Function

Parameters

Parameter	Type
response	T

Returns

void

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L142

Methods

__TAURI_TO_IPC_KEY__()

__TAURI_TO_IPC_KEY__(): string

Returns

string

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L146

toJSON()

toJSON(): string

Returns

string

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L150

---

PluginListener

Constructors

new PluginListener()

new PluginListener(
   plugin,
   event,
   channelId): PluginListener

Parameters

Parameter	Type
plugin	string
event	string
channelId	number

Returns

PluginListener

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L161

Properties

Property	Type	Defined in
channelId	number	Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L159
event	string	Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L158
plugin	string	Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L157

Methods

unregister()

unregister(): Promise<void>

Returns

Promise<void>

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L167

---

Resource

A rust-backed resource stored through tauri::Manager::resources_table API.

The resource lives in the main process and does not exist in the Javascript world, and thus will not be cleaned up automatiacally except on application exit. If you want to clean it up early, call Resource.close

Example

import { Resource, invoke } from '@tauri-apps/api/core';
export class DatabaseHandle extends Resource {
  static async open(path: string): Promise<DatabaseHandle> {
    const rid: number = await invoke('open_db', { path });
    return new DatabaseHandle(rid);
  }

  async execute(sql: string): Promise<void> {
    await invoke('execute_sql', { rid: this.rid, sql });
  }
}

Extended by

• Image
• TrayIcon

Constructors

new Resource()

new Resource(rid): Resource

Parameters

Parameter	Type
rid	number

Returns

Resource

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L322

Accessors

rid

get rid(): number

Returns

number

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L318

Methods

close()

close(): Promise<void>

Destroys and cleans up this resource from memory. You should not call any method on this object anymore and should drop any reference to it.

Returns

Promise<void>

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L330

Interfaces

InvokeOptions

Since

2.0.0

Properties

Property	Type	Defined in
headers	HeadersInit	Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L233

Type Aliases

InvokeArgs

type InvokeArgs: Record<string, unknown> | number[] | ArrayBuffer | Uint8Array;

Command arguments.

Since

1.0.0

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L227

---

PermissionState

type PermissionState: "granted" | "denied" | "prompt" | "prompt-with-rationale";

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L202

Variables

SERIALIZE_TO_IPC_FN

const SERIALIZE_TO_IPC_FN: "__TAURI_TO_IPC_KEY__" = '__TAURI_TO_IPC_KEY__';

A key to be used to implement a special function on your types that define how your type should be serialized when passing across the IPC.

Example

Given a type in Rust that looks like this

#[derive(serde::Serialize, serde::Deserialize)
enum UserId {
  String(String),
  Number(u32),
}

UserId::String("id") would be serialized into { String: "id" } and so we need to pass the same structure back to Rust

import { SERIALIZE_TO_IPC_FN } from "@tauri-apps/api/core"

class UserIdString {
  id
  constructor(id) {
    this.id = id
  }

  [SERIALIZE_TO_IPC_FN]() {
    return { String: this.id }
  }
}

class UserIdNumber {
  id
  constructor(id) {
    this.id = id
  }

  [SERIALIZE_TO_IPC_FN]() {
    return { Number: this.id }
  }
}

type UserId = UserIdString | UserIdNumber

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L59

Functions

addPluginListener()

function addPluginListener<T>(
   plugin,
   event,
cb): Promise<PluginListener>

Adds a listener to a plugin event.

Type Parameters

Type Parameter
T

Parameters

Parameter	Type
plugin	string
event	string
cb	(payload) => void

Returns

Promise<PluginListener>

The listener object to stop listening to the events.

Since

2.0.0

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L182

---

checkPermissions()

function checkPermissions<T>(plugin): Promise<T>

Get permission state for a plugin.

This should be used by plugin authors to wrap their actual implementation.

Type Parameters

Type Parameter
T

Parameters

Parameter	Type
plugin	string

Returns

Promise<T>

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L209

---

convertFileSrc()

function convertFileSrc(filePath, protocol): string

Convert a device file path to an URL that can be loaded by the webview. Note that asset: and http://asset.localhost must be added to app.security.csp in tauri.conf.json. Example CSP value: "csp": "default-src 'self' ipc: http://ipc.localhost; img-src 'self' asset: http://asset.localhost" to use the asset protocol on image sources.

Additionally, "enable" : "true" must be added to app.security.assetProtocol in tauri.conf.json and its access scope must be defined on the scope array on the same assetProtocol object.

Parameters

Parameter	Type	Default value	Description
filePath	string	undefined	The file path.
protocol	string	'asset'	The protocol to use. Defaults to asset. You only need to set this when using a custom protocol.

Returns

string

the URL that can be used as source on the webview.

Example

import { appDataDir, join } from '@tauri-apps/api/path';
import { convertFileSrc } from '@tauri-apps/api/core';
const appDataDirPath = await appDataDir();
const filePath = await join(appDataDirPath, 'assets/video.mp4');
const assetUrl = convertFileSrc(filePath);

const video = document.getElementById('my-video');
const source = document.createElement('source');
source.type = 'video/mp4';
source.src = assetUrl;
video.appendChild(source);
video.load();

Since

1.0.0

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L289

---

invoke()

function invoke<T>(
   cmd,
   args,
options?): Promise<T>

Sends a message to the backend.

Type Parameters

Type Parameter
T

Parameters

Parameter	Type	Description
cmd	string	The command name.
args	InvokeArgs	The optional arguments to pass to the command.
options?	InvokeOptions	The request options.

Returns

Promise<T>

A promise resolving or rejecting to the backend response.

Example

import { invoke } from '@tauri-apps/api/core';
await invoke('login', { user: 'tauri', password: 'poiwe3h4r5ip3yrhtew9ty' });

Since

1.0.0

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L251

---

isTauri()

function isTauri(): boolean

Returns

boolean

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L337

---

requestPermissions()

function requestPermissions<T>(plugin): Promise<T>

Request permissions.

This should be used by plugin authors to wrap their actual implementation.

Type Parameters

Type Parameter
T

Parameters

Parameter	Type
plugin	string

Returns

Promise<T>

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L218

---

transformCallback()

function transformCallback<T>(callback?, once?): number

Stores the callback in a known location, and returns an identifier that can be passed to the backend. The backend uses the identifier to eval() the callback.

Type Parameters

Type Parameter	Default type
T	unknown

Parameters

Parameter	Type	Default value
callback?	(response) => void	undefined
once?	boolean	false

Returns

number

An unique identifier associated with the callback function.

Since

1.0.0

Source: https://github.com/tauri-apps/tauri/blob/dev/packages/api/src/core.ts#L69