This example uses OpenLayers v10.9.0. The latest is v.
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#### Moveend Event

moveend 1 map 1 event 1

#####

left: right: bottom: top:

Use of the moveend event.

In this example, a listener is registered for the map's `moveend` event. Whenever this listener is called, it updates the inputs below with the map extent in decimal degrees.

##### main.js

    import Map from 'ol/Map.js';
    import View from 'ol/View.js';
    import {getBottomLeft, getTopRight} from 'ol/extent.js';
    import TileLayer from 'ol/layer/Tile.js';
    import {toLonLat} from 'ol/proj.js';
    import OSM from 'ol/source/OSM.js';

    const map = new Map({
      layers: [
        new TileLayer({
          source: new OSM(),
        }),
      ],
      target: 'map',
      view: new View({
        center: [0, 0],
        zoom: 2,
      }),
    });

    function display(id, value) {
      document.getElementById(id).value = value.toFixed(2);
    }

    function wrapLon(value) {
      const worlds = Math.floor((value + 180) / 360);
      return value - worlds * 360;
    }

    function onMoveEnd(evt) {
      const map = evt.map;
      const extent = map.getView().calculateExtent(map.getSize());
      const bottomLeft = toLonLat(getBottomLeft(extent));
      const topRight = toLonLat(getTopRight(extent));
      display('left', wrapLon(bottomLeft[0]));
      display('bottom', bottomLeft[1]);
      display('right', wrapLon(topRight[0]));
      display('top', topRight[1]);
    }

    map.on('moveend', onMoveEnd);

##### index.html

    <!DOCTYPE html>
    <html lang="en">
      <head>
        <meta charset="UTF-8">
        <title>Moveend Event</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>
        <label>left: <input readonly="readonly" type="text" id="left"></label>
        <label>right: <input readonly="readonly" type="text" id="right"></label>
        <label>bottom: <input readonly="readonly" type="text" id="bottom"></label>
        <label>top: <input readonly="readonly" type="text" id="top"></label>

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

##### package.json

    {
      "name": "moveend",
      "dependencies": {
        "ol": "10.9.0"
      },
      "devDependencies": {
        "vite": "^3.2.3"
      },
      "scripts": {
        "start": "vite",
        "build": "vite build"
      }
    }