Get features under the mouse pointer

Use queryRenderedFeatures to show properties of hovered-over map elements.

Get features under the mouse pointer






<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Get features under the mouse pointer</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
<script src="https://cdn.jsdelivr.net/npm/@goongmaps/goong-js@1.0.9/dist/goong-js.js"></script>
<link href="https://cdn.jsdelivr.net/npm/@goongmaps/goong-js@1.0.9/dist/goong-js.css" rel="stylesheet" />
<style>
	body { margin: 0; padding: 0; }
    #map { position: absolute; top: 0; bottom: 0; width: 100%; }
</style>
</head>
<body>

<style>
    #features {
        position: absolute;
        top: 0;
        right: 0;
        bottom: 0;
        width: 50%;
        overflow: auto;
        background: rgba(255, 255, 255, 0.8);
    }
    #map canvas {
        cursor: crosshair;
    }
</style>
<div id="map"></div>
<pre id="features"></pre>
<script>
    goongjs.accessToken = 'wnicbAmnNkoMHNYUKWnlFHezV189FjmMwkNJ7hKW';
    var map = new goongjs.Map({
        container: 'map',
        style: 'https://tiles.goong.io/assets/goong_map_web.json',
        center: [-96, 37.8],
        zoom: 3
    });

    map.on('mousemove', function (e) {
        var features = map.queryRenderedFeatures(e.point);

        // Limit the number of properties we're displaying for
        // legibility and performance
        var displayProperties = [
            'type',
            'properties',
            'id',
            'layer',
            'source',
            'sourceLayer',
            'state'
        ];

        var displayFeatures = features.map(function (feat) {
            var displayFeat = {};
            displayProperties.forEach(function (prop) {
                displayFeat[prop] = feat[prop];
            });
            return displayFeat;
        });

        document.getElementById('features').innerHTML = JSON.stringify(
            displayFeatures,
            null,
            2
        );
    });
</script>
</body>
</html>