ancostia leaflet map

<!DOCTYPE html>
<html>
<head>
	
	<title>Anacostia River Map</title>

<div id="mapid" style="width: 960px; height: 500px;"></div>
  
<script src="https://leenoah1.github.io/class_project/census.js" type="text/javascript"></script>  
<script>
	// mapview creation
	var mymap = L.map('mapid').setView([38.88355, -76.96301], 13);
// Add a tile layer to the mapview
	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="https://openstreetmap.org">OpenStreetMap</a> contributors, ' +
			'<a href="https://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, ' +
			'Imagery © <a href="https://mapbox.com">Mapbox</a>',
		id: 'mapbox.streets'
	}).addTo(mymap);
	
    	// load GeoJSON from an external file
  $.getJSON("AnacostiaWatershed_censusData.geojson",function(data){
    // add GeoJSON layer to the map once the file is loaded
   L.geoJson(data).addTo(map);
  });
  
	L.marker([38.87032, -76.99751]).addTo(mymap)
		.bindPopup("<b>I am a popup on the Anacostia River.").openPopup();
;
	var popup = L.popup();
	function onMapClick(e) {
		popup
			.setLatLng(e.latlng)
			.setContent("You clicked the map at " + e.latlng.toString())
			.openOn(mymap);
	}
  
	mymap.on('click', onMapClick);
    
  
</script>

</body>
</html>

https://unpkg.com/leaflet@1.0.3/dist/leaflet.js

https://leenoah1.github.io/class_project/census.js