react-use/src/useMediaDevices.ts

import {useState, useEffect} from './react';
import {on, off} from './util';

const noop = () => {};

const useMediaDevices = () => {
  const [state, setState] = useState({});

  useEffect(() => {
    let mounted = true;

    const onChange = () => {
      navigator.mediaDevices.enumerateDevices()
        .then((devices) => {
          if (mounted) {
            setState({
              devices: devices.map(({deviceId, groupId, kind, label}) =>
              ({deviceId, groupId, kind, label})
            )
          });
        }
      })
      .catch(noop);
    };

    on(navigator.mediaDevices, 'devicechange', onChange);
    onChange();

    return () => {
      mounted = false;
      off(navigator.mediaDevices, 'devicechange', onChange);
    };
  }, [0]);

  return state;
};

export default useMediaDevices;