Platform

プラットフォームサービスは、現在のデバイスに関する情報を取得するために使用できます。platforms メソッドを利用することでデバイスに関連付けられているすべてのプラットフォームを取得できます。例えば、アプリがタブレットから表示されているかどうか（モバイルデバイスまたはブラウザ上にある場合）、および正確なプラットフォーム（iOS、Android など）などです。右から左への言語の向きなどを使用すれば、デバイスの向きもわかります。この情報を使用して、あらゆるデバイスに合わせてアプリを完全にカスタマイズできます。

Usage

import { Platform } from '@ionic/angular';

@Component({...})
export class MyPage {
  constructor(public platform: Platform) {

  }
}

Methods

is

Description	Depending on the platform the user is on, is(platformName) will return true or false. Note that the same app can return true for more than one platform name. For example, an app running from an iPad would return true for the platform names: mobile, ios, ipad, and tablet. Additionally, if the app was running from Cordova then cordova would be true.
Signature	is(platformName: Platforms) => boolean

Parameters

Name	Type	Description
platformName	Platforms	Name of the platform. Available options are android, capacitor, cordova, desktop, electron, hybrid, ios, ipad, iphone, mobile, phablet, pwa, tablet

Platforms

以下は、利用可能なすべての platform の値とそれに対応する説明をまとめた表です。

Platform Name	Description
android	a device running Android
capacitor	a device running Capacitor
cordova	a device running Cordova
desktop	a desktop device
electron	a desktop device running Electron
hybrid	a device running Capacitor or Cordova
ios	a device running iOS
ipad	an iPad device
iphone	an iPhone device
mobile	a mobile device
mobileweb	a web browser running in a mobile device
phablet	a phablet device
pwa	a PWA app
tablet	a tablet device

Customizing Platform Detection Functions

The function used to detect a specific platform can be overridden by providing an alternative function in the global Ionic config. Each function takes window as a parameter and returns a boolean.

import { IonicModule } from '@ionic/angular';

@NgModule({
  ...
  imports: [
    BrowserModule,
    IonicModule.forRoot({
      platform: {
        /** The default `desktop` function returns false for devices with a touchscreen.
        * This is not always wanted, so this function tests the User Agent instead.
        **/
        'desktop': (win) => {
          const isMobile = /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(win.navigator.userAgent);
          return !isMobile;
        }
      },
    }),
    AppRoutingModule
  ],
  ...
})

type PlatformConfig = {
  android?: ((win: Window) => boolean) | undefined;
  capacitor?: ((win: Window) => boolean) | undefined;
  cordova?: ((win: Window) => boolean) | undefined;
  desktop?: ((win: Window) => boolean) | undefined;
  electron?: ((win: Window) => boolean) | undefined;
  hybrid?: ((win: Window) => boolean) | undefined;
  ios?: ((win: Window) => boolean) | undefined;
  ipad?: ((win: Window) => boolean) | undefined;
  iphone?: ((win: Window) => boolean) | undefined;
  mobile?: ((win: Window) => boolean) | undefined;
  mobileweb?: ((win: Window) => boolean) | undefined;
  phablet?: ((win: Window) => boolean) | undefined;
  pwa?: ((win: Window) => boolean) | undefined;
  tablet?: ((win: Window) => boolean) | undefined;
};

platforms

Description	Depending on what device you are on, platforms can return multiple values. Each possible value is a hierarchy of platforms. For example, on an iPhone, it would return mobile, ios, and iphone.
Signature	platforms() => string[]

ready

Description

Returns a promise when the platform is ready and native functionality can be called. If the app is running from within a web browser, then the promise will resolve when the DOM is ready. When the app is running from an application engine such as Cordova, then the promise will resolve when Cordova triggers the deviceready event. The resolved value is the readySource, which states the platform that was used. For example, when Cordova is ready, the resolved ready source is cordova. The default ready source value will be dom. The readySource is useful if different logic should run depending on the platform the app is running from. For example, only Capacitor and Cordova can execute the status bar plugin, so the web should not run status bar plugin logic.

Signature

ready() => Promise<string>

isRTL

Description	Returns if this app is using right-to-left language direction or not. We recommend the app's index.html file already has the correct dir attribute value set, such as <html dir="ltr"> or <html dir="rtl">. W3C: Structural markup and right-to-left text in HTML
Signature	isRTL() => boolean

isLandscape

Description	Returns true if the app is in landscape mode.
Signature	isLandscape() => boolean

isPortrait

Description	Returns true if the app is in portrait mode.
Signature	isPortrait() => boolean

width

Description	Gets the width of the platform's viewport using window.innerWidth.
Signature	width() => number

height

Description	Gets the height of the platform's viewport using window.innerHeight.
Signature	height() => number

url

Description	Get the current url.
Signature	url() => string

testUserAgent

Description	Returns true if the expression is included in the user agent string.
Signature	testUserAgent(expression: string) => boolean

Parameters

Name	Type	Description
expression	string	The string to check in the user agent

Events

pause

pause イベントは、ネイティブ・プラットフォームがアプリケーションをバックグラウンドに置いたとき、通常はユーザーが別のアプリケーションに切り替えたときに発生します。このイベントは、Cordova/Capacitor アプリケーションがバックグラウンドに置かれたときに発生しますが、標準的な Web ブラウザでは発生しません。

Examples

this.platform.pause.subscribe(async () => {
  alert('Pause event detected');
});

resize

resize イベントは、ブラウザウィンドウの寸法が変更されたときに発生します。これは、ブラウザーウィンドウが物理的にサイズ変更されている場合や、デバイスの向きが変わっている場合に発生します。

Examples

this.platform.resize.subscribe(async () => {
  alert('Resize event detected');
});

resume

resume イベントは、ネイティブプラットフォームがバックグラウンドからアプリケーションを引き出したときに発生します。このイベントは、Cordova/Capacitor アプリがバックグラウンドから出てきても、標準的な Web ブラウザで起動しない場合に発生します。

Examples

this.platform.resume.subscribe(async () => {
  alert('Resume event detected');
});