V2.0.0

Support of the react-leaflet v2 has been introduced.

There are critical changes that touch to the MarkerClusterGroup API:
1. Support of marker object lat and lng keys are removed.
2. options property of MarkerClusterGroup removed.
3. Console deprecated warnings are removed.
4. Better handling of events.
5. Demo application completely rewritten and replaced with StoryBook.

v1.1.8

Critical changes that touch to the MarkerClusterGroup API:

1. options property is deprecated (will be removed at v1.2.0).

Since now you don't need to use options prop to pass Leaflet.markercluster option into <MarkerClusterGroup />.

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

For example:

// New API
<MarkerClusterGroup showCoverageOnHover={false} />

// How it was before 1.1.8
<MarkerClusterGroup options={{ 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),
  });
}

// New API
<MarkerClusterGroup iconCreateFunction={createClusterCustomIcon} showCoverageOnHover={false} />

// How it was before 1.1.8
<MarkerClusterGroup options={{ iconCreateFunction: clusterCustomIcon, showCoverageOnHover: false }} />

2. Deprecated wrapperOptions property has been removed.

How to replace wrapperOptions old enableDefaultStyle | disableDefaultAnimation | removeDuplicates features:

• enableDefaultStyle: to enable leaflet.markercluster default style for cluster,
  just import Markercluster styles:

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

require('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/react-leaflet-markercluster/dist/styles.min.css" />

• disableDefaultAnimation: to disable markers animation, set Leaflet.markercluster
  animate option to false:

<MarkerClusterGroup markers={markers} options={{ animate: false }} />

• removeDuplicates: you could use our previous solution for markers filtering
  (before sending them to MarkerClusterGroup) as follows:

function removeMarkersWithSameCoordinates(markers) {
  // init filtered markers list with first marker from list
  const filteredMarkers = [markers[0]];

  markers.forEach((marker) => {
    if (!JSON.stringify(filteredMarkers).includes(JSON.stringify(marker))) {
      filteredMarkers.push(marker);
    }
  });

  return filteredMarkers;
}

// ...
render() {
  const filteredMarkers = removeMarkersWithSameCoordinates(this.props.markers);
  return (
    // ...
    <MarkerClusterGroup markers={filteredMarkers} />
    // ...
  )
}
// ...

3. Bug Fix

• Dependencies Update
• Demo-app: Update Panel props according to latest react-bootstrap specification
• Remove requiring of deprecated-styles inside react-leaflet-markercluster.js plugin
• Use react context store to access markers instead of cloning markers during their render
• Deprecation warnings about MarkerClusterGroup options property
• Update Demo-app with fresh examples

v1.1.7

Critical changes that touch to the MarkerClusterGroup API.

1. marker object lat and lng keys are deprecated (will be removed at v1.2.0).

To set marker position, please use position key at marker object like:

const markers = [
  { position: [49.8397, 24.0297] },
  { position: [52.2297, 21.0122] },
  { position: [51.5074, -0.0901] },
];

position that is Leaflet.LatLng
array or object, that could be declared like:

const markers = [
  { position: [49.8397, 24.0297] }, // [lat, lng]
  { position: { lat: 52.2297, lng: 21.0122 } },
  { position: { lat: 52.2297, lon: 21.0122 } },
];

2. wrapperOptions is fully deprecated and will not use anymore (will be removed at v1.1.8).

How to replace wrapperOptions old enableDefaultStyle | disableDefaultAnimation | removeDuplicates features:

1. enableDefaultStyle: to enable leaflet.markercluster default style for cluster,
   just import Markercluster styles:

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

require('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/react-leaflet-markercluster/dist/styles.min.css" />

2. disableDefaultAnimation: to disable markers animation, set Leaflet.markercluster
   animate option to false:

<MarkerClusterGroup markers={markers} options={{ animate: false }} />

3. removeDuplicates: you could use our previous solution for markers filtering
   (before sending them to MarkerClusterGroup) as follows:

function removeMarkersWithSameCoordinates(markers) {
  // init filtered markers list with first marker from list
  const filteredMarkers = [markers[0]];

  markers.forEach((marker) => {
    if (!JSON.stringify(filteredMarkers).includes(JSON.stringify(marker))) {
      filteredMarkers.push(marker);
    }
  });

  return filteredMarkers;
}

// ...
render() {
  const filteredMarkers = removeMarkersWithSameCoordinates(this.props.markers);
  return (
    // ...
    <MarkerClusterGroup markers={filteredMarkers} />
    // ...
  )
}
// ...