moveend

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/ol3/3.11.2/ol-debug.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/ol3/3.11.2/ol.css">
<div id="map"></div>

CSS

.map {
    height:400px;
    width:200px;
}

JavaScript

var map = new ol.Map({
    layers: [
        new ol.layer.Tile({
            source: new ol.source.OSM()
        })
    ],
    renderer: 'canvas',
    target: 'map',
    view: new ol.View2D({
        center: [0, 0],
        zoom: 2
    })
});

map.on('moveend', function(evt) {
    alert("OK!");
});