Constrained Extent

Example of a view with a constrained extent.

This map has a view that is constrained in an extent. This is done using the extent view option. Please note that specifying constrainOnlyCenter: true would only apply the extent restriction to the view center.

main.js

import Map from 'ol/Map.js';
import OSM from 'ol/source/OSM.js';
import TileLayer from 'ol/layer/Tile.js';
import View from 'ol/View.js';
import ZoomSlider from 'ol/control/ZoomSlider.js';
import {defaults as defaultControls} from 'ol/control.js';

const view = new View({
  center: [328627.563458, 5921296.662223],
  zoom: 8,
  extent: [-572513.341856, 5211017.966314, 916327.095083, 6636950.728974],
});

new Map({
  layers: [
    new TileLayer({
      source: new OSM(),
    }),
  ],
  keyboardEventTarget: document,
  target: 'map',
  view: view,
  controls: defaultControls().extend([new ZoomSlider()]),
});

index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>Constrained Extent</title>
    <link rel="stylesheet" href="node_modules/ol/ol.css">
    <style>
      .map {
        width: 100%;
        height: 400px;
      }
    </style>
  </head>
  <body>
    <div id="map" class="map"></div>

    <script type="module" src="main.js"></script>
  </body>
</html>

package.json

{
  "name": "extent-constrained",
  "dependencies": {
    "ol": "9.1.0"
  },
  "devDependencies": {
    "vite": "^3.2.3"
  },
  "scripts": {
    "start": "vite",
    "build": "vite build"
  }
}