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redux-map-gl

v0.1.0

Published

Simplify react-map-gl and redux

Downloads

52

Readme

redux-map-gl

A small library to remove the boilerplate of connecting you the react-map-gl component to a redux store.

Getting started

Install

$ npm install --save redux-map-gl

Usage Example

The redux-map-gl package consists of two parts, a reducer enhancer (or just a reducer) which you should connect to your store and an action creator which you should dispatch.

import {combineReducers} from 'redux';
import {createViewportReducer} from 'redux-map-gl';

import fooReducer from './foo';

export default combineReducers({
  foo: fooReducer,
  map: createViewportReducer()
});

Once the reducer is connected to the store, simply modify your map container to pass the mapState back to your Map component and pass the onChangeViewport as an action creator to be dispatched. By default, the reducer will attach all map state under the viewport key.

The map state is an immutableJS object. If you want a plain object, call .toJS() on the viewport state.

import {connect} from 'react-redux';
import {onChangeViewport} from 'redux-map-gl';

import Map from '../components/map/map';
import {getMapStyle} from '../selectors/map-style';

function mapStateToProps(state) {
  const mapState = state.map.viewport.toJS();
  const mapStyle = getMapStyle(state);

  return {
    mapState,
    mapStyle
  };
}

const actions = {
  onChangeViewport
};

export default connect(mapStateToProps, actions)(Map);

In your Map component, you can then render with the mapState:

import React, {PropTypes} from 'react';
import MapGL from 'react-map-gl';

import {MAPBOX_ACCESS_TOKEN} from '../../lib/constants';

const Map = ({
  mapState,
  mapStyle,
  onChangeViewport
}) => {

  return (
    <MapGL
      {...mapState}
      showZoomControls={true}
      width={500}
      height={500}
      mapStyle={mapStyle}
      mapboxApiAccessToken={MAPBOX_ACCESS_TOKEN}
      onChangeViewport={onChangeViewport}
    />
  );
};

export default Map;

Use as an enhancer

If you already have a map reducer which handles some other map state, such as things to show on the map, then you may want to enhance that reducer rather than replacing it. redux-map-gl exports a reducer enhancer by default for this purpose. For example:

import {combineReducers} from 'redux';
import enhanceMapReducer from 'redux-map-gl';

import fooReducer from './foo';
import mapReducer from './map';

export default combineReducers({
  foo: fooReducer,
  map: enhanceMapReducer(mapReducer)
});

This will add the viewport key to your existing map state tree, but defer all other actions to your existing reducer.

Defaults and options

As many apps will render an initial map in a specific place before the viewport changes, you can specify default options as the second argument to the reducer or reducer enhancer:

export default combineReducers({
  foo: fooReducer,
  map: enhanceMapReducer(mapReducer, {
    latitude: 52.1,
    longitude: 0,
    zoom: 10,
    bearing: 90
  })
});

If you wish to put the viewport state under a different key. You can do this by passing it as a third parameter:

export default combineReducers({
  foo: fooReducer,
  map: enhanceMapReducer(mapReducer, {}, 'world')
});

In this example, state could be fetched with state.map.world.

Development

$ npm install
$ npm run build