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Filter symbols by text input

Filter symbols by text input

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

Filter symbols by text input
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<!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" />
<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>
    .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>
    var places = {
        'type': 'FeatureCollection',
        'features': [
            {
                'type': 'Feature',
                'properties': {
                    'icon': 'theatre'
                },
                'geometry': {
                    'type': 'Point',
                    'coordinates': [105.79998778336434, 21.01402924595785]
                }
            },
            {
                'type': 'Feature',
                'properties': {
                    'icon': 'theatre'
                },
                'geometry': {
                    'type': 'Point',
                    'coordinates': [105.80844779933346, 21.017413597514967]
                }
            },
            {
                'type': 'Feature',
                'properties': {
                    'icon': 'bar'
                },
                'geometry': {
                    'type': 'Point',
                    'coordinates': [105.82352901021386, 21.01464195668537]
                }
            },
            {
                'type': 'Feature',
                'properties': {
                    'icon': 'bicycle'
                },
                'geometry': {
                    'type': 'Point',
                    'coordinates': [105.80997267336716, 21.002605417767967]
                }
            },
            {
                'type': 'Feature',
                'properties': {
                    'icon': 'music'
                },
                'geometry': {
                    'type': 'Point',
                    'coordinates': [105.81375070070531, 21.010416584945258]
                }
            },
            {
                'type': 'Feature',
                'properties': {
                    'icon': 'music'
                },
                'geometry': {
                    'type': 'Point',
                    'coordinates': [105.80842283412754, 21.006449448058355]
                }
            },
            {
                'type': 'Feature',
                'properties': {
                    'icon': 'music'
                },
                'geometry': {
                    'type': 'Point',
                    'coordinates': [105.80123537896272, 21.002594218806486]
                }
            }
        ]
    };

    var layerIDs = []; // Will contain a list used to filter against.
    var filterInput = document.getElementById('filter-input');
    goongjs.accessToken = 'wnicbAmnNkoMHNYUKWnlFHezV189FjmMwkNJ7hKW';
    var map = new goongjs.Map({
        container: 'map',
        style: 'https://tiles.goong.io/assets/goong_map_web.json',
        center: [105.80123537896272, 21.002594218806486],
        zoom: 13
    });

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

        places.features.forEach(function (feature) {
            var symbol = feature.properties['icon'];
            var 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': {
                        'icon-image': symbol + '-15',
                        'icon-allow-overlap': true,
                        'text-field': symbol,
                        'text-font': ['Roboto Regular'],
                        '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', function (e) {
            // If the input value matches a layerID set
            // it's visibility to 'visible' or else hide it.
            var value = e.target.value.trim().toLowerCase();
            layerIDs.forEach(function (layerID) {
                map.setLayoutProperty(
                    layerID,
                    'visibility',
                    layerID.indexOf(value) > -1 ? 'visible' : 'none'
                );
            });
        });
    });
</script>
</body>
</html>