Layers (32)
Display buildings in 3DExtrude polygons for 3D indoor mappingAdd a 3D modelAdjust 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 propertiesCreate and style clustersChange a layer's color with buttonsAdd a custom style layerStyle circles with a data-driven propertyStyle lines with a data-driven propertyDisplay and style rich text labelsUse a fallback imageAdd a pattern to a polygonAdd a new layer below labelsAdd a GeoJSON lineDraw GeoJSON pointsAdd hillshadingCreate a heatmap layerCreate a gradient line using an expressionAdd multiple geometries from one GeoJSON sourceStyle ocean depth dataShow and hide layersUpdate a choropleth layer by zoom levelChange worldview of administrative boundariesVariable label placementVisualize population densityAdd a GeoJSON polygon

Adjust a layer's opacity

Drag the range slider to adjust the opacity of a raster layer on top of a map.

<!DOCTYPE html>
<meta charset="utf-8" />
<title>Adjust a layer's opacity</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
<script src="https://api.mapbox.com/mapbox-gl-js/v1.6.1/mapbox-gl.js"></script>
<link href="https://api.mapbox.com/mapbox-gl-js/v1.6.1/mapbox-gl.css" rel="stylesheet" />
body { margin: 0; padding: 0; }
#map { position: absolute; top: 0; bottom: 0; width: 100%; };
.map-overlay {
font: bold 12px/20px 'Helvetica Neue', Arial, Helvetica, sans-serif;
position: absolute;
width: 25%;
top: 0;
left: 0;
padding: 10px;
.map-overlay .map-overlay-inner {
background-color: #fff;
box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
border-radius: 3px;
padding: 10px;
margin-bottom: 10px;
.map-overlay label {
display: block;
margin: 0 0 10px;
.map-overlay input {
background-color: transparent;
display: inline-block;
width: 100%;
position: relative;
margin: 0;
cursor: ew-resize;
<div id="map"></div>
<div class="map-overlay top">
<div class="map-overlay-inner">
<label>Layer opacity: <span id="slider-value">100%</span></label>
mapboxgl.accessToken = '<your access token here>';
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/light-v10',
center: [-87.6321, 41.8362],
minZoom: 9.5,
maxZoom: 13,
zoom: 9.5
var slider = document.getElementById('slider');
var sliderValue = document.getElementById('slider-value');
map.on('load', function() {
'id': 'chicago',
'source': {
'type': 'raster',
'url': 'mapbox://mapbox.u8yyzaor'
'type': 'raster'
slider.addEventListener('input', function(e) {
// Adjust the layers opacity. layer here is arbitrary - this could
// be another layer name found in your style or a custom layer
// added on the fly using `addSource`.
parseInt(e.target.value, 10) / 100
// Value indicator
sliderValue.textContent = e.target.value + '%';
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