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Filter symbols by text input

Additional Developer Resources

Filter symbols by icon name by typing in a text input.

Referencing images in a style's sprite

This example uses the Mapbox Light style. The icon-image used in this example comes from the Mapbox Light style's sprite.

To view all available images in a style's sprite or add additional images, open the style in Mapbox Studio and click the Images tab. To add a new image to the style at runtime see the Add an icon to the map example.

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Filter symbols by text input</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<link href="https://api.mapbox.com/mapbox-gl-js/v3.7.0/mapbox-gl.css" rel="stylesheet">
<script src="https://api.mapbox.com/mapbox-gl-js/v3.7.0/mapbox-gl.js"></script>
<style>
body { margin: 0; padding: 0; }
#map { position: absolute; top: 0; bottom: 0; width: 100%; }
</style>
</head>
<body>
<style>
    .filter-ctrl {
        position: absolute;
        top: 10px;
        right: 10px;
        z-index: 1;
    }

    .filter-ctrl input[type='text'] {
        font:
            12px/20px 'Helvetica Neue',
            Arial,
            Helvetica,
            sans-serif;
        width: 100%;
        border: 0;
        background-color: #fff;
        margin: 0;
        color: rgba(0, 0, 0, 0.5);
        padding: 10px;
        box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.1);
        border-radius: 3px;
        width: 180px;
    }
</style>
<div id="map"></div>
<div class="filter-ctrl">
    <input id="filter-input" type="text" name="filter" placeholder="Filter by name">
</div>

<script>
	// TO MAKE THE MAP APPEAR YOU MUST
	// ADD YOUR ACCESS TOKEN FROM
	// https://account.mapbox.com
	mapboxgl.accessToken = 'YOUR_MAPBOX_ACCESS_TOKEN';
    // This GeoJSON contains features that include an "icon"
    // property. The value of the "icon" property corresponds
    // to an image in the Mapbox Light style's sprite.
    const places = {
        'type': 'FeatureCollection',
        'features': [
            {
                'type': 'Feature',
                'properties': {
                    'icon': 'theatre'
                },
                'geometry': {
                    'type': 'Point',
                    'coordinates': [-77.038659, 38.931567]
                }
            },
            {
                'type': 'Feature',
                'properties': {
                    'icon': 'theatre'
                },
                'geometry': {
                    'type': 'Point',
                    'coordinates': [-77.003168, 38.894651]
                }
            },
            {
                'type': 'Feature',
                'properties': {
                    'icon': 'bar'
                },
                'geometry': {
                    'type': 'Point',
                    'coordinates': [-77.090372, 38.881189]
                }
            },
            {
                'type': 'Feature',
                'properties': {
                    'icon': 'bicycle'
                },
                'geometry': {
                    'type': 'Point',
                    'coordinates': [-77.052477, 38.943951]
                }
            },
            {
                'type': 'Feature',
                'properties': {
                    'icon': 'music'
                },
                'geometry': {
                    'type': 'Point',
                    'coordinates': [-77.031706, 38.914581]
                }
            },
            {
                'type': 'Feature',
                'properties': {
                    'icon': 'music'
                },
                'geometry': {
                    'type': 'Point',
                    'coordinates': [-77.020945, 38.878241]
                }
            },
            {
                'type': 'Feature',
                'properties': {
                    'icon': 'music'
                },
                'geometry': {
                    'type': 'Point',
                    'coordinates': [-77.007481, 38.876516]
                }
            }
        ]
    };

    const layerIDs = []; // This array will contain a list used to filter against.
    const filterInput = document.getElementById('filter-input');
    const map = new mapboxgl.Map({
        container: 'map',
        // Choose from Mapbox's core styles, or make your own style with Mapbox Studio
        style: 'mapbox://styles/mapbox/light-v11',
        center: [-77.04, 38.907],
        zoom: 11.15
    });

    map.on('load', () => {
        // Add a GeoJSON source containing place coordinates and information.
        map.addSource('places', {
            'type': 'geojson',
            'data': places
        });

        for (const feature of places.features) {
            const symbol = feature.properties.icon;
            const layerID = `poi-${symbol}`;

            // Add a layer for this symbol type if it hasn't been added already.
            if (!map.getLayer(layerID)) {
                map.addLayer({
                    'id': layerID,
                    'type': 'symbol',
                    'source': 'places',
                    'layout': {
                        // These icons are a part of the Mapbox Light style.
                        // To view all images available in a Mapbox style, open
                        // the style in Mapbox Studio and click the "Images" tab.
                        // To add a new image to the style at runtime see
                        // https://docs.mapbox.com/mapbox-gl-js/example/add-image/
                        'icon-image': `${symbol}`,
                        'icon-allow-overlap': true,
                        'text-field': symbol,
                        'text-font': [
                            'Open Sans Bold',
                            'Arial Unicode MS Bold'
                        ],
                        'text-size': 11,
                        'text-transform': 'uppercase',
                        'text-letter-spacing': 0.05,
                        'text-offset': [0, 1.5]
                    },
                    'paint': {
                        'text-color': '#202',
                        'text-halo-color': '#fff',
                        'text-halo-width': 2
                    },
                    'filter': ['==', 'icon', symbol]
                });

                layerIDs.push(layerID);
            }
        }

        filterInput.addEventListener('keyup', (e) => {
            // If the input value matches a layerID set
            // it's visibility to 'visible' or else hide it.
            const value = e.target.value.trim().toLowerCase();
            for (const layerID of layerIDs) {
                map.setLayoutProperty(
                    layerID,
                    'visibility',
                    layerID.includes(value) ? 'visible' : 'none'
                );
            }
        });
    });
</script>

</body>
</html>
This code snippet will not work as expected until you replace YOUR_MAPBOX_ACCESS_TOKEN with an access token from your Mapbox account.
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