Example of using WFS with a BBOX strategy.

This example loads new features from GeoServer WFS when the view extent changes.

index.html<!DOCTYPE html>
<html lang="en">
    <!-- 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>
      .map {
        width: 100%;
    <div id="map" class="map"></div>
    <script src="index.js"></script>
index.jsimport '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 {bbox as bboxStrategy} from 'ol/loadingstrategy';
import BingMaps from 'ol/source/BingMaps';
import VectorSource from 'ol/source/Vector';
import {Stroke, Style} from 'ol/style';

var vectorSource = new VectorSource({
  format: new GeoJSON(),
  url: function(extent) {
    return 'https://ahocevar.com/geoserver/wfs?service=WFS&' +
        'version=1.1.0&request=GetFeature&typename=osm:water_areas&' +
        'outputFormat=application/json&srsname=EPSG:3857&' +
        'bbox=' + extent.join(',') + ',EPSG:3857';
  strategy: bboxStrategy

var vector = new VectorLayer({
  source: vectorSource,
  style: new Style({
    stroke: new Stroke({
      color: 'rgba(0, 0, 255, 1.0)',
      width: 2

var raster = new TileLayer({
  source: new BingMaps({
    imagerySet: 'Aerial',
    key: 'Your Bing Maps Key from http://www.bingmapsportal.com/ here'

var map = new Map({
  layers: [raster, vector],
  target: document.getElementById('map'),
  view: new View({
    center: [-8908887.277395891, 5381918.072437216],
    maxZoom: 19,
    zoom: 12
  "name": "vector-wfs",
  "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"