This example uses OpenLayers v10.9.0. The latest is v.
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#### Drag-and-Drop Image Vector

drag-and-drop-image-vector 1 gpx 3 geojson 11 igc 3 kml 9 topojson 3 maptiler 26 vector 86 image 8

#####

Example of using the drag-and-drop interaction with image vector rendering.

Example of using the drag-and-drop interaction with an `ol/layer/VectorImage` layer. Drag and drop GPX, GeoJSON, IGC, KML, or TopoJSON files on to the map. Each file is rendered to an image on the client.

##### main.js

    import Map from 'ol/Map.js';
    import View from 'ol/View.js';
    import GPX from 'ol/format/GPX.js';
    import GeoJSON from 'ol/format/GeoJSON.js';
    import IGC from 'ol/format/IGC.js';
    import KML from 'ol/format/KML.js';
    import TopoJSON from 'ol/format/TopoJSON.js';
    import DragAndDrop from 'ol/interaction/DragAndDrop.js';
    import {defaults as defaultInteractions} from 'ol/interaction/defaults.js';
    import TileLayer from 'ol/layer/Tile.js';
    import VectorImageLayer from 'ol/layer/VectorImage.js';
    import ImageTile from 'ol/source/ImageTile.js';
    import VectorSource from 'ol/source/Vector.js';

    const dragAndDropInteraction = new DragAndDrop({
      formatConstructors: [GPX, GeoJSON, IGC, KML, TopoJSON],
    });

    const key = 'Get your own API key at https://www.maptiler.com/cloud/';
    const attributions =
      '<a href="https://www.maptiler.com/copyright/" target="_blank">&copy; MapTiler</a> ' +
      '<a href="https://www.openstreetmap.org/copyright" target="_blank">&copy; OpenStreetMap contributors</a>';

    const map = new Map({
      interactions: defaultInteractions().extend([dragAndDropInteraction]),
      layers: [
        new TileLayer({
          source: new ImageTile({
            attributions: attributions,
            url:
              'https://api.maptiler.com/maps/satellite/{z}/{x}/{y}.jpg?key=' + key,
            tileSize: 512,
            maxZoom: 20,
          }),
        }),
      ],
      target: 'map',
      view: new View({
        center: [0, 0],
        zoom: 2,
      }),
    });

    dragAndDropInteraction.on('addfeatures', function (event) {
      const vectorSource = new VectorSource({
        features: event.features,
      });
      map.addLayer(
        new VectorImageLayer({
          source: vectorSource,
        }),
      );
      map.getView().fit(vectorSource.getExtent());
    });

    const displayFeatureInfo = function (pixel) {
      const features = [];
      map.forEachFeatureAtPixel(pixel, function (feature) {
        features.push(feature);
      });
      if (features.length > 0) {
        const info = [];
        let i, ii;
        for (i = 0, ii = features.length; i < ii; ++i) {
          info.push(features[i].get('name'));
        }
        document.getElementById('info').innerHTML = info.join(', ') || '&nbsp';
      } else {
        document.getElementById('info').innerHTML = '&nbsp;';
      }
    };

    map.on('pointermove', function (evt) {
      if (evt.dragging) {
        return;
      }
      displayFeatureInfo(evt.pixel);
    });

    map.on('click', function (evt) {
      displayFeatureInfo(evt.pixel);
    });

##### index.html

    <!DOCTYPE html>
    <html lang="en">
      <head>
        <meta charset="UTF-8">
        <title>Drag-and-Drop Image Vector</title>
        <link rel="stylesheet" href="node_modules/ol/ol.css">
        <style>
          .map {
            width: 100%;
            height: 400px;
          }
        </style>
      </head>
      <body>
        <div id="map" class="map"></div>
        <div id="info">&nbsp;</div>

        <script type="module" src="main.js"></script>
      </body>
    </html>

##### package.json

    {
      "name": "drag-and-drop-image-vector",
      "dependencies": {
        "ol": "10.9.0"
      },
      "devDependencies": {
        "vite": "^3.2.3"
      },
      "scripts": {
        "start": "vite",
        "build": "vite build"
      }
    }