Mapbox GL JS
Examples
Styles (11)Add a default markerAdd an animated icon to the mapAdd a generated icon to the mapGenerate and add a missing icon to the mapAdd a stretchable image to the mapAdd an icon to the mapDisplay a map with a custom styleRender world copiesDisplay a satellite mapChange a map's styleDisplay a mapLayers (32)Extrude polygons for 3D indoor mappingAdd a 3D modelDisplay buildings in 3DAdjust a layer's opacityAnimate a lineAnimate a series of imagesAnimate a pointChange building color based on zoom levelChange the case of labelsDisplay HTML clusters with custom propertiesChange a layer's color with buttonsCreate and style clustersAdd a custom style layerStyle circles with a data-driven propertyStyle lines with a data-driven propertyUse a fallback imageAdd a pattern to a polygonAdd a new layer below labelsAdd a GeoJSON lineDraw GeoJSON pointsAdd a GeoJSON polygonCreate a heatmap layerAdd hillshadingCreate a gradient line using an expressionAdd multiple geometries from one GeoJSON sourceDisplay and style rich text labelsStyle ocean depth dataShow and hide layersChange worldview of administrative boundariesUpdate a choropleth layer by zoom levelVariable label placementVisualize population densitySources (10)Add a canvas sourceJoin local JSON data with vector tile geometriesAdd an imageAdd live realtime dataUpdate a feature in realtimeAdd a raster tile sourceAdd a third party vector tile sourceAdd a vector tile sourceAdd a videoAdd a WMS sourceUser interaction (21)Customize camera animationsAnimate 3D buildings based on ambient soundsDisable map rotationCreate a draggable MarkerFilter symbols by text inputFilter symbols by toggling a listFilter features within map viewCreate a hover effectDisplay a non-interactive mapChange a map's languageMeasure distancesGet coordinates of the mouse pointerHighlight features containing similar dataSelect features around a clicked pointGet features under the mouse pointerRestrict map panning to an areaCreate a time sliderToggle interactionsHighlight features within a bounding boxFit to the bounds of a LineStringCreate a draggable pointCamera (12)Animate map camera around a pointAnimate a point along a routeCenter the map on a clicked symbolFit a map to a bounding boxSlowly fly to a locationFly to a locationNavigate the map with game-like controlsJump to a series of locationsPlay map locations as a slideshowOffset the vanishing point using paddingFly to a location based on scroll positionSet pitch and bearingControls and overlays (17)Animate a markerChange the default position for attributionAdd custom icons with MarkersDisable scroll zoomView a fullscreen mapLocate the userSwipe between mapsDisplay driving directionsShow drawn polygon areaAdd a geocoderAdd a marker using a place nameDisplay map navigation controlsShow polygon information on clickDisplay a popup on clickDisplay a popup on hoverDisplay a popupAttach a popup to a marker instanceGeocoder (9)Supplement forward geocoding search results from another data sourceAccept coordinates as input to a geocoderUse a custom render function with a geocoderLimit geocoder results to a named regionUse the geocoder without a mapPlace the geocoder input outside the mapUse a custom camera animation with a geocoderLocalize the geocoder to a given languageSet a point after Geocoder resultBrowser support (1)Check if Mapbox GL JS is supportedInternationalization support (2)Use locally generated ideographsAdd support for right-to-left scripts

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" />
<script src="https://api.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.js"></script>
<link href="https://api.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.css" rel="stylesheet" />
<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 id
style: 'mapbox://styles/mapbox/streets-v11', // stylesheet location
center: [-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>
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