Add a pattern to a polygon | TrackAsia GL JS Docs

Use fill-pattern to draw a polygon from a repeating image pattern.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Add a pattern to a polygon</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
<script src="https://unpkg.com/trackasia-gl@1.0.5/dist/trackasia-gl.js"></script>
<link href="https://unpkg.com/trackasia-gl@1.0.5/dist/trackasia-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 trackasiagl.Map({
container: 'map',
style: 'https://maps.track-asia.com/styles/v1/streets.json?key=public_key',
zoom: 1
});
 
map.on('load', function () {
// Add GeoJSON data
map.addSource('source', {
'type': 'geojson',
'data': {
'type': 'Feature',
'properties': {},
'geometry': {
'type': 'Polygon',
'coordinates': [
[
[-30, -25],
[-30, 35],
[30, 35],
[30, -25],
[-30, -25]
]
]
}
}
});
 
// Load an image to use as the pattern
map.loadImage(
'https://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Cat_silhouette.svg/64px-Cat_silhouette.svg.png',
function (err, image) {
// Throw an error if something went wrong
if (err) throw err;
 
// Declare the image
map.addImage('pattern', image);
 
// Use it
map.addLayer({
'id': 'pattern-layer',
'type': 'fill',
'source': 'source',
'paint': {
'fill-pattern': 'pattern'
}
});
}
);
});
</script>
 
</body>
</html>