Data URI SVG icons with Leaflet

Demonstrates how to load SVG's as Leaflet icons via the data URI method.

Following was helpful to figure this out:

Optimizing SVGs in Data URIs
http://codepen.io/gabrien/pen/NqGvGq
http://codepen.io/chriscoyier/pen/ZQgvyG/

This block is a modified example taken from Working with spatial data.

Built with blockbuilder.org

forked from enjalot's block: WWSD #1: Leaflet starter

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
  <link rel="stylesheet" href="https://cdn.leafletjs.com/leaflet/v0.7.7/leaflet.css" />
   <script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.7/leaflet.min.js"></script>
  
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    #map {
      height: 100%;
    }
  </style>
</head>

<body>
  <div id="map"></div>
  <script>
    var map = L.map('map').setView([30, 0], 2);

L.tileLayer('https://{s}.tile.osm.org/{z}/{x}/{y}.png', {
        attribution: '&copy; <a href="https://osm.org/copyright">OpenStreetMap</a> contributors'
    }).addTo(map);
    
    var CustomIcon = L.Icon.extend({
			options: {
				iconSize:     [40, 40],
				shadowSize:   [50, 64],
				iconAnchor:   [22, 94],
				shadowAnchor: [4, 62],
				popupAnchor:  [-3, -76]
			}
		});
    
    var svgrect = "<svg xmlns='https://www.w3.org/2000/svg'><rect x='0' y='0' width='20' height='10' fill='#5a7cd2'></rect><rect x='0' y='15' width='20' height='10' fill='#5d52cf'></rect></svg>";
    
		/* 
    For data URI SVG support in Firefox & IE it's necessary to URI encode the string
    & replace the '#' character with '%23'. `encodeURI()` won't do this which is
    why `replace()` must be used on the string afterwards.
    */
    var url = encodeURI("data:image/svg+xml," + svgrect).replace('#','%23');
    console.log(url);
   
    var rectIcon = new CustomIcon({iconUrl: url})
    
    L.marker([52, -0.09], {icon: rectIcon}).bindPopup("I am data URI SVG icon.").addTo(map);

</script>
</body>

Modified http://cdn.leafletjs.com/leaflet/v0.7.7/leaflet.js to a secure url

https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js

https://cdn.leafletjs.com/leaflet/v0.7.7/leaflet.js