expo-sensors/build/ExponentGyroscope.web.js

Provides access to a hardware device's accelerometer, gyroscope, magnetometer, and pedometer.

import { DeviceEventEmitter } from 'react-native';
import { assertSensorEventEnabledAsync, getPermissionsAsync, isSensorEnabledAsync, requestPermissionsAsync, } from './utils/isSensorEnabledAsync.web';
const eventName = 'devicemotion';
export default {
    async isAvailableAsync() {
        if (typeof DeviceMotionEvent === 'undefined') {
            return false;
        }
        return await isSensorEnabledAsync(eventName);
    },
    _handleMotion({ accelerationIncludingGravity: acceleration, timeStamp }) {
        // Abort if data is missing from the event
        if (acceleration === null)
            return;
        DeviceEventEmitter.emit('gyroscopeDidUpdate', {
            x: acceleration.x,
            y: acceleration.y,
            z: acceleration.z,
            timestamp: timeStamp / 1000,
        });
    },
    getPermissionsAsync,
    requestPermissionsAsync,
    startObserving() {
        assertSensorEventEnabledAsync(eventName);
        window.addEventListener(eventName, this._handleMotion);
    },
    stopObserving() {
        window.removeEventListener(eventName, this._handleMotion);
    },
};
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