@globalfishingwatch/react-map-gl/dist/es6/components/map-context.js

A React wrapper for MapboxGL-js and overlay API.

import React, { createContext, useState, useContext } from 'react';
const MapContext = createContext({
  viewport: null,
  map: null,
  container: null,
  onViewportChange: null,
  onViewStateChange: null,
  eventManager: null,
  isDragging: false
});
export const MapContextProvider = MapContext.Provider;

MapContext.Provider = function WrappedProvider({
  value,
  children
}) {
  const [map, setMap] = useState(null);
  const context = useContext(MapContext);
  value = {
    setMap,
    ...context,
    map: context && context.map || map,
    ...value
  };
  return React.createElement(MapContextProvider, {
    value: value
  }, children);
};

export default MapContext;
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