Source url

by Vladimir Vershinin

HTML

<script src="https://unpkg.com/[email protected]/lodash.js"></script>
<script src="https://unpkg.com/vue@latest/dist/vue.min.js"></script>
<script src="https://cdn.jsdelivr.net/gh/openlayers/openlayers.github.io/en/v5.3.0/build/ol.js"></script>
<script src="https://npmcdn.com/@turf/turf/turf.min.js"></script>
<script src="https://unpkg.com/[email protected]/lib/index.umd.js"></script>
<link rel="stylesheet" href="https://unpkg.com/[email protected]/lib/style.css">
<div id="app">
  <div>Current zoom {{ zoom }}</div>
  <vl-map ref="map" data-projection="EPSG:4326">
    <vl-view ref="mapView" :zoom.sync="zoom" :center.sync="center"></vl-view>
    
    <vl-layer-tile>
      <vl-source-osm />
    </vl-layer-tile>
    
    <vl-layer-vector render-mode="image">
      <vl-source-vector ref="vectorSource" :url="currentUrl" />
    </vl-layer-vector>
    
  </vl-map>  
</div>

CSS

html, body, #app {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

JavaScript

new Vue({
	el: '#app',
  data () {
  	return {
    	zoom: 2,
      center: [0, 0],
      countriesUrl: 'https://openlayers.org/en/latest/examples/data/geojson/countries.geojson',
      riversUrl: 'https://d2ad6b4ur7yvpq.cloudfront.net/naturalearth-3.3.0/ne_50m_rivers_lake_centerlines.geojson',
      currentUrl: undefined,
    }
  },
  mounted () {
  	this.currentUrl = this.countriesUrl
    setInterval(() => {
      if (this.currentUrl === this.countriesUrl) {
        this.currentUrl = this.riversUrl
      } else {
        this.currentUrl = this.countriesUrl
      }
    }, 3000)
  },
})