Vue Map - Add and Remove
To add markers at design-time, pass an array of objects to the markers property. A marker requires only its location to be specified.
- <dx-map
- [zoom]="5"
- [markers]="mapMarkers">
- </dx-map>
- import { DxMapModule } from "devextreme-angular";
- // ...
- export class AppComponent {
- mapMarkers = [
- { location: "40.749825, -73.090443" },
- { location: "42.743244, -71.594375" },
- { location: "37.058435, -74.903842" }
- ];
- }
- @NgModule({
- imports: [
- // ...
- DxMapModule
- ],
- // ...
- })
To add or remove a marker at runtime, call the addMarker(markerOptions) or removeMarker(marker) method.
- const 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() {
- const 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");
- $("#removeMarker").dxButton({
- text: "Remove the Last Marker",
- onClick: function () {
- const markers = map.option("markers");
- const markerCount = markers.length;
- if (markerCount < 1)
- return;
- // Removes the last marker
- map.removeMarker(markers[markerCount - 1]);
- }
- });
- });
With Angular, Vue, or React, use a different technique. Bind the markers property of the Map UI component to a component property.
- <dx-map
- [zoom]="10"
- [markers]="mapMarkers"
- (onClick)="addMarker($event)">
- </dx-map>
- <dx-button
- text="Remove the Last Marker"
- (onClick)="removeMarker()">
- </dx-button>
- import { DxMapModule, DxButtonModule } from "devextreme-angular";
- // ...
- export class AppComponent {
- mapMarkers = [
- { location: "40.749825, -73.090443" },
- { location: "42.743244, -71.594375" }
- ];
- addMarker (e) {
- this.mapMarkers.push({ location: e.location });
- };
- removeMarker () {
- this.mapMarkers.pop();
- }
- }
- @NgModule({
- imports: [
- // ...
- DxMapModule,
- DxButtonModule
- ],
- // ...
- })
See Also
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