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Version: v4

@capacitor/screen-reader

スクリーンリーダーAPIは、TalkBack/VoiceOver/などへのアクセスを提供し、視覚的なアクセシビリティのための簡単なテキスト読み上げ機能を提供します。

Install

npm install @capacitor/screen-reader
npx cap sync

Example

import { ScreenReader } from '@capacitor/screen-reader';

ScreenReader.addListener('screenReaderStateChange', ({ value }) => {
console.log(`Screen reader is now ${value ? 'on' : 'off'}`);
});

const checkScreenReaderEnabled = async () => {
const { value } = await ScreenReader.isEnabled();

console.log('Voice over enabled? ' + value);
};

const sayHello = async () => {
await ScreenReader.speak({ value: 'Hello World!' });
};

API

isEnabled()

isEnabled() => Promise<{ value: boolean; }>

Whether a Screen Reader is currently active.

This method is not supported on web (it is not possible to detect Screen Readers).

Returns: Promise<{ value: boolean; }>

Since: 1.0.0


speak(...)

speak(options: SpeakOptions) => Promise<void>

Text-to-Speech functionality.

This function will only work if a Screen Reader is currently active.

On web, browsers must support the SpeechSynthesis API, or this method will throw an error.

For more text-to-speech capabilities, please see the Capacitor Community Text-to-Speech plugin.

ParamType
optionsSpeakOptions

Since: 1.0.0


addListener('stateChange', ...)

addListener(eventName: 'stateChange', listener: StateChangeListener) => Promise<PluginListenerHandle> & PluginListenerHandle

Add a listener for when the screen reader is turned on or off.

This event used to be named 'accessibilityScreenReaderStateChange'.

This method is not supported on web (it is not possible to detect Screen Readers).

ParamType
eventName'stateChange'
listenerStateChangeListener

Returns: Promise<PluginListenerHandle> & PluginListenerHandle

Since: 1.0.0


removeAllListeners()

removeAllListeners() => Promise<void>

Remove all the listeners that are attached to this plugin.

Since: 1.0.0


Interfaces

SpeakOptions

PropTypeDescriptionSince
valuestringThe text to speak.1.0.0
languagestringThe language to speak the text in, as its ISO 639-1 Code (e.g.: "en"). This option is only supported on Android.1.0.0

PluginListenerHandle

PropType
remove() => Promise<void>

ScreenReaderState

PropTypeDescriptionSince
valuebooleanWhether a Screen Reader is currently active.1.0.0

Type Aliases

StateChangeListener

(state: ScreenReaderState): void