Add a vector tile source

Add a vector source to a map.

Mapbox GL unsupported
Mapbox GL requires WebGL support. Please check that you are using a supported browser and that WebGL is enabled.
<!DOCTYPE html>
<meta charset='utf-8' />
<title>Add a vector tile source</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.53.0/mapbox-gl.js'></script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.53.0/mapbox-gl.css' rel='stylesheet' />
body { margin:0; padding:0; }
#map { position:absolute; top:0; bottom:0; width:100%; }
<div id='map'></div>
mapboxgl.accessToken = '<your access token here>';
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/light-v9',
zoom: 13,
center: [-122.447303, 37.753574]
map.on('load', function () {
"id": "terrain-data",
"type": "line",
"source": {
type: 'vector',
url: 'mapbox://mapbox.mapbox-terrain-v2'
"source-layer": "contour",
"layout": {
"line-join": "round",
"line-cap": "round"
"paint": {
"line-color": "#ff69b4",
"line-width": 1