Display marker tooltip on load

Control whether a marker tooltip should be displayed on load

<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Display marker tooltip on load</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src='https://api.mapbox.com/mapbox.js/v3.2.1/mapbox.js'></script>
<link href='https://api.mapbox.com/mapbox.js/v3.2.1/mapbox.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>
L.mapbox.accessToken = '<your access token here>';
var map = L.mapbox.map('map')
    .setView([40.7271, -73.9840], 14)
    .addLayer(L.mapbox.styleLayer('mapbox://styles/mapbox/streets-v11'));

// Build a marker from a simple GeoJSON object:
var marker = L.mapbox.featureLayer({
    type: 'Feature',
    geometry: {
        type: 'Point',
        coordinates: [-73.9840, 40.7271]
    },
    properties: {
        title: 'Hello world!',
        'marker-color': '#f86767'
    }
}).addTo(map);

// Iterate over the featureLayer we've called "marker"
// and open its popup instead of clicking to trigger it.
marker.eachLayer(function(m) {
  m.openPopup();
});
</script>
</body>
</html>
to create your own custom map and use it in this example.
Use this example by copying its source into your own HTML page and replacing the Map ID with one of your own from your projects. Having trouble with JavaScript? Try out Codecademy or contact our support team.
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