Filter symbols by toggling a list
Filter a set of symbols based on a property value in the data.
<!DOCTYPE html><html><head><meta charset="utf-8" /><title>Filter symbols by toggling a list</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-group {font: 12px/20px 'Helvetica Neue', Arial, Helvetica, sans-serif;font-weight: 600;position: absolute;top: 10px;right: 10px;z-index: 1;border-radius: 3px;width: 120px;color: #fff;} .filter-group input[type='checkbox']:first-child + label {border-radius: 3px 3px 0 0;} .filter-group label:last-child {border-radius: 0 0 3px 3px;border: none;} .filter-group input[type='checkbox'] {display: none;} .filter-group input[type='checkbox'] + label {background-color: #3386c0;display: block;cursor: pointer;padding: 10px;border-bottom: 1px solid rgba(0, 0, 0, 0.25);} .filter-group input[type='checkbox'] + label {background-color: #3386c0;text-transform: capitalize;} .filter-group input[type='checkbox'] + label:hover,.filter-group input[type='checkbox']:checked + label {background-color: #4ea0da;} .filter-group input[type='checkbox']:checked + label:before {content: '✔';margin-right: 5px;}</style><div id="map"></div><nav id="filter-group" class="filter-group"></nav> <script>var 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]}}]}; var filterGroup = document.getElementById('filter-group');goongjs.accessToken = '8qzxZAuxcsctSlmOszInchP1A5GrmRBHJwCBCjO6';var map = new goongjs.Map({container: 'map',style: 'https://tiles.goong.io/assets/goong_map_web.json',center: [-77.04, 38.907],zoom: 11.15}); 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},'filter': ['==', 'icon', symbol]}); // Add checkbox and label elements for the layer.var input = document.createElement('input');input.type = 'checkbox';input.id = layerID;input.checked = true;filterGroup.appendChild(input); var label = document.createElement('label');label.setAttribute('for', layerID);label.textContent = symbol;filterGroup.appendChild(label); // When the checkbox changes, update the visibility of the layer.input.addEventListener('change', function (e) {map.setLayoutProperty(layerID,'visibility',e.target.checked ? 'visible' : 'none');});}});});</script> </body></html>