DevExtreme React - Add and Remove
To add markers at design-time, pass an array of objects to the markers option. A marker requires only its location to be specified.
To add or remove a marker at runtime, call the addMarker(markerOptions) or removeMarker(marker) method.
- var markersCollection = [
- { location: "40.749825, -73.090443" },
- { location: "42.743244, -71.594375", tooltip: { isShown: true } }
- ];
- // Adds a marker
- map.addMarker(markersCollection[0]);
- // Adds several markers
- map.addMarker(markersCollection);
- // Removes the marker with specific configuration
- map.removeMarker(markersCollection[1]);
- // Removes the marker with index 2 in the "markers" array
- map.removeMarker(2);
- // Removes the markers with specific configurations
- map.removeMarker(markersCollection);
- // Removes the markers with indexes 0 and 4 in the "markers" array
- map.removeMarker([0, 4]);
In the following code, a marker is added each time a user clicks someplace on the Map. The last marker from the markers array is removed when the user clicks the Button under the Map.
- $(function() {
- var map = $("#mapContainer").dxMap({
- center: { lat: 40.749825, lng: -73.987963 },
- zoom: 10,
- onClick: function (e) {
- e.component.addMarker({
- // Location of the clicked point on the map
- location: e.location
- });
- }
- }).dxMap("instance");
- $("#removeMarker").dxButton({
- text: "Remove the Last Marker",
- onClick: function () {
- var markers = map.option("markers");
- var markerCount = markers.length;
- if (markerCount < 1)
- return;
- // Removes the last marker
- map.removeMarker(markers[markerCount - 1]);
- }
- });
- });
With Angular, AngularJS, or Knockout, use a different technique. Bind the markers option of the Map widget to a component property (in Angular), a scope property (in AngularJS) or an observable array (in Knockout).
See Also
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