qgis2leaf Example

<!DOCTYPE html>
<html>
<head>
	<title>QGIS2leaf webmap</title>
	<meta charset="utf-8" />
	
	<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.2/leaflet.css" /> 
	
<style>
	body {
		padding: 0;
		margin: 0;
	}
	html, body, #map {
		height: 650px;
		width: 600px;
	}
</style>
</head>
<body>
	<div id="map"></div> 
	<script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.2/leaflet.js"></script> 
  
		<script src='exp_sidewalkcafes.js' ></script>
		
		<script src='exp_nybb.js' ></script>
		
	<script>
		var map = L.map('map', { zoomControl:true }).fitBounds([[40.7001163235,-74.0320533993],[40.7323412874,-73.9664786596]]);
		var additional_attrib = 'created w. <a href="https://github.com/geolicious/qgis2leaf" target ="_blank">gis2leaf</a> by <a href="https://www.geolicious.de" target ="_blank">Geolicious</a> & contributors<br>';
	var feature_group = new L.featureGroup([]);
	
		map.attributionControl.addAttribution(additional_attrib + 'Map tiles by <a href="https://stamen.com">Stamen Design</a>, <a href="https://creativecommons.org/licenses/by/3.0">CC BY 3.0</a> &mdash; Map data: &copy; <a href="https://openstreetmap.org">OpenStreetMap</a> contributors,<a href="https://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>');
		L.tileLayer('https://a.tile.stamen.com/terrain/{z}/{x}/{y}.png').addTo(map);
		
			function pop_sidewalkcafes(feature, layer) {
				var popupContent = '<table><tr><th>attribute</th><th>value</th></tr><tr><td>CafeType</td><td>' + feature.properties.CafeType + '</td></tr><tr><td>Shape_Leng</td><td>' + feature.properties.Shape_Leng + '</td></tr></table>';
				layer.bindPopup(popupContent);
			}
					
			var exp_sidewalkcafesJSON = new L.geoJson(exp_sidewalkcafes,{
				onEachFeature: pop_sidewalkcafes,
				style: function (feature) {
					return {weight: feature.properties.radius_qgis2leaf,
							color: feature.properties.color_qgis2leaf,
							opacity: feature.properties.transp_qgis2leaf,
							fillOpacity: feature.properties.transp_fill_qgis2leaf};
					}
				});
			feature_group.addLayer(exp_sidewalkcafesJSON);
			
					//add comment sign to hide this layer on the map in the initial view.
					exp_sidewalkcafesJSON.addTo(map);
			function pop_nybb(feature, layer) {
				var popupContent = '<table><tr><th>attribute</th><th>value</th></tr><tr><td>BoroCode</td><td>' + feature.properties.BoroCode + '</td></tr><tr><td>BoroName</td><td>' + feature.properties.BoroName + '</td></tr><tr><td>Shape_Leng</td><td>' + feature.properties.Shape_Leng + '</td></tr><tr><td>Shape_Area</td><td>' + feature.properties.Shape_Area + '</td></tr><tr><td>diso</td><td>' + feature.properties.diso + '</td></tr><tr><td>AreaSqMile</td><td>' + feature.properties.AreaSqMile + '</td></tr></table>';
				layer.bindPopup(popupContent);
			}
					
			
	</script>
</body>
</html>

Modified http://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.2/leaflet.js to a secure url

https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.2/leaflet.js