@ircam/devicemotion

Minimal wrapper around the devicemotion API (cf. https://www.w3.org/TR/orientation-event/#devicemotion to normalize API, axis and units accross browsers.

Warning: Be aware that most, if not all, recent browsers will require your application to run through a https connection to grant access to motion sensors.

Install

npm install @ircam/devicemotion --save

Example

import devicemotion from '@ircam/devicemotion';

const permission = await devicemotion.requestPermission();

if (permission === 'granted') {
  devicemotion.addEventListener(e => console.log(e));
}

API

async devicemotion.requestPermission() -> Promise('granted' | 'refused')

Request permission to access motion sensors, this method should be called on the startup of your application, most browsers will prompt your users so that they authorize the sensors to be accessed by the application

devicemotion.addEventListener(callback: Function) -> void

The callback will be called with the data formatted as specificied in https://www.w3.org/TR/orientation-event/#devicemotion

devicemotion.addEventListener(e => {
  console.log(e);

  /*
  e = { 
    interval // ms
    accelerationIncludingGravity = { x, y, z } // m/s2
    rotationRate = { alpha, beta, gamma } // deg/s
  }
  */
});

Note: The event object is internally reused by the library, therefore it's the responsibility of the application to copy the data if needed.

devicemotion.removeEventListener(callback: Function) -> void

License

BSD-3-Clause