Navigate the map with game-like controls | UNL Map JS Docs

Use the keyboard's arrow keys to move around the map with game-like controls.

Note

If you want to test this example, edit it in JSFiddle or CodePen and replace the "YOUR-OWN-API-KEY" and "YOUR-OWN-VPM-ID" placeholders with your actual api key and vpm id.

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Navigate the map with game-like controls</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
<script src="https://unpkg.com/unl-map-js@0.1.5/lib/unl-map-js.js"></script>
<link href="https://unpkg.com/unl-map-js@0.1.5/lib/unl-map-js.css" rel="stylesheet" />
<link
href="https://unpkg.com/maplibre-gl@2.1.9/dist/maplibre-gl.css"
rel="stylesheet"
/>
<style>
	body { margin: 0; padding: 0; }
	#map { position: absolute; top: 0; bottom: 0; width: 100%; }
</style>
</head>
<body>
<div id="map"></div>
 
<script>
var map = new UnlSdk.Map({
container: "map",
apiKey: "YOUR-OWN-API-KEY",
vpmId: "YOUR-OWN-VPM-ID",
center: [-87.6298, 41.8781],
zoom: 17,
bearing: -12,
pitch: 60,
interactive: false,
});
 
// pixels the map pans when the up or down arrow is clicked
var deltaDistance = 100;
 
// degrees the map rotates when the left or right arrow is clicked
var deltaDegrees = 25;
 
function easing(t) {
return t * (2 - t);
}
 
map.on("load", function () {
map.getCanvas().focus();
 
map.getCanvas().addEventListener(
"keydown",
function (e) {
e.preventDefault();
if (e.which === 38) {
// up
map.panBy([0, -deltaDistance], {
easing: easing,
});
} else if (e.which === 40) {
// down
map.panBy([0, deltaDistance], {
easing: easing,
});
} else if (e.which === 37) {
// left
map.easeTo({
bearing: map.getBearing() - deltaDegrees,
easing: easing,
});
} else if (e.which === 39) {
// right
map.easeTo({
bearing: map.getBearing() + deltaDegrees,
easing: easing,
});
}
},
true
);
});
</script>
 
</body>
</html>