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WMS GetFeatureInfo (Layers)

All features:
Hotel features:
Restaurant features:

Shows how to fetch features per layer name in a single WMS GetFeatureInfo request

Demonstrates the use of the layers option in the ol/format/WMSGetFeatureInfo format object, which allows features returned by a single WMS GetFeatureInfo request that asks for more than one layer to be read by layer name.

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index.html<!DOCTYPE html>
<html lang="en">
  <head>
    <title>WMS GetFeatureInfo (Layers)</title>
    <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
    <style>
      .map {
        width: 100%;
        height:400px;
      }
    </style>
  </head>
  <body>
    <table id="info">
      <tr>
        <td>All features:</td>
        <td id="all"></td>
      </tr>
      <tr>
        <td>Hotel features:</td>
        <td id="hotel"></td>
      </tr>
      <tr>
        <td>Restaurant features:</td>
        <td id="restaurant"></td>
      </tr>
    </table>
    <script src="index.js"></script>
  </body>
</html>
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index.jsimport 'ol/ol.css';
import WMSGetFeatureInfo from 'ol/format/WMSGetFeatureInfo';

fetch('data/wmsgetfeatureinfo/osm-restaurant-hotel.xml').then(function(response) {
  return response.text();
}).then(function(response) {

  // this is the standard way to read the features
  var allFeatures = new WMSGetFeatureInfo().readFeatures(response);
  document.getElementById('all').innerText = allFeatures.length.toString();

  // when specifying the 'layers' options, only the features of those
  // layers are returned by the format
  var hotelFeatures = new WMSGetFeatureInfo({
    layers: ['hotel']
  }).readFeatures(response);
  document.getElementById('hotel').innerText = hotelFeatures.length.toString();

  var restaurantFeatures = new WMSGetFeatureInfo({
    layers: ['restaurant']
  }).readFeatures(response);
  document.getElementById('restaurant').innerText = restaurantFeatures.length.toString();

});
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package.json{
  "name": "getfeatureinfo-layers",
  "dependencies": {
    "ol": "6.1.1"
  },
  "devDependencies": {
    "parcel": "1.11.0"
  },
  "scripts": {
    "start": "parcel index.html",
    "build": "parcel build --experimental-scope-hoisting --public-url . index.html"
  }
}