title: Load external geojson file in OpenLayers 5.3.0
body: <p>I have a problem loading external geojson file in OpenLayers 5.3.0 with the ol package. I installed it via npm. Here's the code: </p>
  
  <pre><code>import 'ol/ol.css';
  import Map from 'ol/Map';
  import View from 'ol/View';
  import GeoJSON from 'ol/format/GeoJSON';
  import {Tile as TileLayer, Vector as VectorLayer} from 'ol/layer';
  import {OSM, Vector as VectorSource} from 'ol/source';
  
  const map = new Map({
    layers: [
      new TileLayer({
        source: new OSM()
      }),
      new VectorLayer({
        source: new VectorSource({
          url: 'data/geojson/countries.geojson',
          format: new GeoJSON()
        })
      })
    ],
    target: 'map',
    view: new View({
      center: [0, 0],
      zoom: 2
    })
  });
  </code></pre>
  
  <p>The file does not show up on map. In console I receive an error 404(Not found)</p>