@mapbox/react-map-gl/src/components/map-context.js

A React wrapper for MapboxGL-js and overlay API.

import {createContext} from 'react';

export default createContext({
  /* Map context */

  // Viewport
  viewport: null,
  // mapboxgl.Map instance
  map: null,
  // DOM element that contains the map
  mapContainer: null,

  /* Interactive-only context */

  // EventManager instance
  eventManager: null,
  // whether the map is being dragged
  isDragging: false
});