react-map-gl/examples/layers/src/app.js

import React, {Component} from 'react';
import {render} from 'react-dom';
import MapGL from 'react-map-gl';
import ControlPanel from './control-panel';

const MAPBOX_TOKEN = ''; // Set your mapbox token here

export default class App extends Component {
  state = {
    mapStyle: '',
    viewport: {
      latitude: 37.805,
      longitude: -122.447,
      zoom: 15.5,
      bearing: 0,
      pitch: 0
    }
  };

  _onViewportChange = viewport => this.setState({viewport});

  _onStyleChange = mapStyle => this.setState({mapStyle});

  render() {
    const {viewport, mapStyle} = this.state;

    return (
      <MapGL
        {...viewport}
        width="100%"
        height="100%"
        mapStyle={mapStyle}
        onViewportChange={this._onViewportChange}
        mapboxApiAccessToken={MAPBOX_TOKEN}
      >
        <ControlPanel
          containerComponent={this.props.containerComponent}
          onChange={this._onStyleChange}
        />
      </MapGL>
    );
  }
}

export function renderToDom(container) {
  render(<App />, container);
}