Description

If you are faced with an issue with markers overlapping during map zooming, or they are overlapping because they are close to each other - you probably need to group them. That is what you can do with react-leaflet-markercluster.

Just grab your markers inside <MarkerClusterGroup /> component, right after <TileLayer />:

import MarkerClusterGroup from '@christopherpickering/react-leaflet-markercluster';

<MarkerClusterGroup>
  <Marker position={[49.8397, 24.0297]} />
  <Marker position={[52.2297, 21.0122]} />
  <Marker position={[51.5074, -0.0901]} />
</MarkerClusterGroup>;

Note: Before getting started, please see these useful guides:

• Leaflet Quick Start Guide.
• react-leaflet Installation.

Table of Contents

• Getting started
• API
• How to run DEV env
• Contributors ✨
• Contributing
• License

Getting started

1. Install packages:

npm install @christopherpickering/react-leaflet-markercluster leaflet react-leaflet leaflet.markercluster

2. Import markercluster and leaflet styles:

@import '~leaflet/dist/leaflet.css'; // sass
@import '~@christopherpickering/react-leaflet-markercluster/dist/styles.min.css'; // sass

require('~leaflet/dist/leaflet.css'); // inside .js file
require('@christopherpickering/react-leaflet-markercluster/dist/styles.min.css'); // inside .js file

Or include CSS styles directly to the head of HTML file:

<link rel="stylesheet" href="https://unpkg.com/leaflet/dist/leaflet.css" />

<link
  rel="stylesheet"
  href="https://unpkg.com/@christopherpickering/react-leaflet-markercluster/dist/styles.min.css"
/>

3. Write some simple react-leaflet Map:

import { MapContainer, TileLayer, Marker } from 'react-leaflet';

<MapContainer
  className="markercluster-map"
  center={[51.0, 19.0]}
  zoom={4}
  maxZoom={18}
>
  <TileLayer
    url="https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png"
    attribution='&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
  />

  <Marker position={[49.8397, 24.0297]} />
  <Marker position={[52.2297, 21.0122]} />
  <Marker position={[51.5074, -0.0901]} />
</MapContainer>;

**NOTE:** Remember to add map styles `.markercluster-map { height: 90vh; }`.

4. Just grab your markers inside <MarkerClusterGroup /> component, right after <TileLayer />:

import MarkerClusterGroup from '@christopherpickering/react-leaflet-markercluster';

<MarkerClusterGroup>
  <Marker position={[49.8397, 24.0297]} />
  <Marker position={[52.2297, 21.0122]} />
  <Marker position={[51.5074, -0.0901]} />
</MarkerClusterGroup>;

More examples with the Documentation CodeSandbox Getting Started

API

Just pass whatever option you need from All Leaflet.markercluster Options to MarkerClusterGroup as prop.

For example:

<MarkerClusterGroup showCoverageOnHover={false} />

or:

const createClusterCustomIcon = function (cluster) {
  return L.divIcon({
    html: `<span>${cluster.getChildCount()}</span>`,
    className: 'marker-cluster-custom',
    iconSize: L.point(40, 40, true),
  });
}

<MarkerClusterGroup iconCreateFunction={createClusterCustomIcon} />

Event listeners

You are able to add any listener, supported by Leaflet, with simple on property prefix.

How to run the Storybook

Run yarn storybook and storybook should automatically open the at http://localhost:6006/.

Contributors ✨

react-leaflet-markercluster was originally built by @yuzhva and then modified by @amauryfischer, @l4b4r4b4b4 and @changey before reaching this point. Many others have contributed as well.

Special thanks to:

• @webcarrot react-leaflet v2 support
• @CodeCutterUK react-leaflet v3 support
• @changey react-leaflet v4 support

Contributing

All sources are placed in the ./src folder:

1. Fork the repo.

2. Edit react-leaflet-markercluster.js plugin or style.scss style files.

3. Commit your changes and open Pull Request.

Thank you for contribution

UMD

UMD builds are available on unpkg:

<!-- unpkg, production code (minified) -->
<script src="https://unpkg.com/@christopherpickering%2freact-leaflet-markercluster/dist/index.js"></script>
<!-- unpkg, development code -->
<script src="https://unpkg.com/@christopherpickering%2freact-leaflet-markercluster/src/react-leaflet-markercluster.js"></script>

<!-- unpkg, production styles (minified) -->
<link
  rel="stylesheet"
  type="text/css"
  href="https://unpkg.com/@christopherpickering%2freact-leaflet-markercluster/dist/styles.min.css"
/>
<!-- unpkg, development styles -->
<link
  rel="stylesheet"
  type="text/css"
  href="https://unpkg.com/@christopherpickering%2freact-leaflet-markercluster/src/styles.scss"
/>

License

MIT License, see LICENSE file. MIT License, see LICENSE file. MIT License, see LICENSE file. MIT License, see LICENSE file. MIT License, see LICENSE file.