Change the case of labels
Use the upcase
and downcase
expressions to change the case of labels.
<!DOCTYPE html><html><head><meta charset="utf-8"><title>Change the case of labels</title><meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no"><link href="https://api.mapbox.com/mapbox-gl-js/v2.1.1/mapbox-gl.css" rel="stylesheet"><script src="https://api.mapbox.com/mapbox-gl-js/v2.1.1/mapbox-gl.js"></script><style>body { margin: 0; padding: 0; }#map { position: absolute; top: 0; bottom: 0; width: 100%; }</style></head><body><div id="map"></div><script> // TO MAKE THE MAP APPEAR YOU MUST // ADD YOUR ACCESS TOKEN FROM // https://account.mapbox.com mapboxgl.accessToken = '<your access token here>';var map = new mapboxgl.Map({container: 'map', // container IDstyle: 'mapbox://styles/mapbox/streets-v11', // style URLcenter: [-116.231, 43.604], // starting position [lng, lat]zoom: 11 // starting zoom}); map.on('load', function () {// data from opendata.cityofboise.org/map.addSource('off-leash-areas', {'type': 'geojson','data': 'https://docs.mapbox.com/mapbox-gl-js/assets/boise.geojson'});map.addLayer({'id': 'off-leash-areas','type': 'symbol','source': 'off-leash-areas','layout': {'icon-image': 'dog-park-11','text-field': ['format',['upcase', ['get', 'FacilityName']],{ 'font-scale': 0.8 },'\n',{},['downcase', ['get', 'Comments']],{ 'font-scale': 0.6 }],'text-font': ['Open Sans Semibold', 'Arial Unicode MS Bold'],'text-offset': [0, 0.6],'text-anchor': 'top'}});});</script> </body></html>