leaflet/docs/examples/quick-start/example-popups.md

layout, title, customMapContainer

layout	title	customMapContainer
tutorial_frame	Quick Start	true

<script>

var mymap = L.map('mapid').setView([51.505, -0.09], 13);

L.tileLayer('https://api.tiles.mapbox.com/v4/{id}/{z}/{x}/{y}.png?access_token=pk.eyJ1IjoibWFwYm94IiwiYSI6ImNpejY4NXVycTA2emYycXBndHRqcmZ3N3gifQ.rJcFIG214AriISLbB6B5aw', {
	maxZoom: 18,
	attribution: 'Map data &copy; <a href="http://openstreetmap.org">OpenStreetMap</a> contributors, ' +
		'<a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, ' +
		'Imagery © <a href="http://mapbox.com">Mapbox</a>',
	id: 'mapbox.streets'
}).addTo(mymap);

L.marker([51.5, -0.09]).addTo(mymap)
	.bindPopup("<b>Hello world!</b><br />I am a popup.").openPopup();

L.circle([51.508, -0.11], 500, {
	color: 'red',
	fillColor: '#f03',
	fillOpacity: 0.5
}).addTo(mymap).bindPopup("I am a circle.");

L.polygon([
	[51.509, -0.08],
	[51.503, -0.06],
	[51.51, -0.047]
]).addTo(mymap).bindPopup("I am a polygon.");


var popup = L.popup();

</script>