Select feature 2

by Vladimir Vershinin

HTML

<script src="https://unpkg.com/[email protected]/dist/vue.js"></script>
<script src="https://cdn.jsdelivr.net/gh/openlayers/openlayers.github.io@master/en/v5.3.0/build/ol.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">
<script src="https://cdn.jsdelivr.net/npm/[email protected]/lodash.min.js"></script>
<div id="app">
  <div>
    {{ message }}
  </div>
  <div>
    {{ selectedFeatures }}
  </div>

  <vl-map ref="map" data-projection="EPSG:4326">
    <vl-view ref="mapView" :zoom.sync="zoom" :center.sync="center"></vl-view>

    <vl-layer-tile id="osm">
      <vl-source-osm></vl-source-osm>
    </vl-layer-tile>

    <vl-layer-vector>
      <vl-source-vector ref="geojsonSource"
        url="https://gist.githubusercontent.com/ghettovoice/37ef37dd571ed39b0985c16560b157d3/raw/a850973f91b811e4ef9af5c317c0dead661ff2ac/map.geojson" 
        :features.sync="features"
        @add:feature="onAddFeature" @remove:feature="onRemoveFeature"></vl-source-vector>
    </vl-layer-vector>
    
    <vl-interaction-select :features.sync="selectedFeatures" 
      @select="onSelect" @unselect="onUnselect" />
  </vl-map>
</div>

CSS

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

.layers {
  position: absolute;
  top: 10px;
  left: 50px;
  z-index: 1;
}

JavaScript

new Vue({
  el: '#app',
  data() {
    return {
      zoom: 2,
      center: [0, 0],
      features: [],
      message: 'Loading...',
      selectedFeatures: [],
    }
  },
  watch: {
  	features: _.debounce(function() {
    	this.message = `Loaded ${this.features.length}`
    
    	this.$refs.mapView.$view.fit(
      	this.$refs.geojsonSource.$source.getExtent(),
        {
        	duration: 1000,
        },
      )
    }, 100),
  },
  methods: {
  	onSelect (feature) {
    	console.log('select', feature)
      
      this.$refs.mapView.fit(feature.getGeometry(), {
      	duration: 1000,
      })
    },
    onUnselect (feature) {
    	console.log('unselect', feature)
    },
    onAddFeature (feature) {
    	console.log('add', feature)
    },
    onRemoveFeature (feature) {
    	console.log('remove', feature)
    },
  },
})