Make it work on node.js.

.gitignore

@@ -0,0 +1 @@
+/node_modules

demo/index.html

@@ -8,9 +8,9 @@
 
 	<script src="js/jquery-2.0.3.min.js"></script>
 	<script src="js/underscore-min.js"></script>
+	<script src="js/clusterfck.js"></script>
 	<script src="../src/rgbquant.js"></script>
 	<script src="../src/rgbquant-sms.js"></script>
-	<script src="js/clusterfck.js"></script>
 	<script src="js/helpers.js"></script>
 	<script src="js/preCode.js"></script>
 	<script src="js/timer.js"></script>

demo/js/clusterfck.js

@@ -627,4 +627,6 @@ function kmeans(points, k, distance, snapshotPeriod, snapshotCb) {
 module.exports = kmeans;
 
 });
- return require('/clusterfck')})();
+ return require('/clusterfck')})();
+
+ this.clusterfck = clusterfck;

index.js

@@ -0,0 +1,47 @@
+'use strict';
+
+const Canvas = require('canvas');
+const Image = Canvas.Image;
+
+const { RgbQuantSMS } = require('./src/rgbquant-sms');
+
+console.log('Canvas', Canvas);
+
+(async () => {
+
+	const quant = new RgbQuantSMS({
+		colors: 16,
+		paletteCount: 1,
+		maxTiles: 256,
+		minHueCols: 0,
+		weighPopularity: true
+	});
+
+	const getCanvas = async (src) => new Promise((resolve, reject) => {
+		const img = new Image();
+		img.onload = () => {			
+			const canvas = new Canvas.Canvas(img.width, img.height);
+			const ctx = canvas.getContext('2d');			
+			ctx.drawImage(img, 0, 0, img.width, img.height);
+			canvas._typeWorkaround = 'Canvas';
+			resolve(canvas);
+		}
+		img.onerror = reject;
+		img.src = src;
+	});
+
+	const canvas = await getCanvas('demo/img/biking.jpg');
+	console.log('canvas', canvas);
+
+	quant.sample(canvas);
+	const palettes = quant.palettes();
+	console.log('palettes', palettes)
+
+	const unoptimizedTileMap = quant.reduceToTileMap(canvas);
+	const optimizedTileMap = quant.normalizeTiles(unoptimizedTileMap);
+	quant.updateTileEntropy(optimizedTileMap.tiles);
+	const similarTiles = quant.groupBySimilarity(optimizedTileMap);
+	const reducedTileMap = quant.removeSimilarTiles(optimizedTileMap, similarTiles);
+
+	console.log('reducedTileMap', { reducedTileMap, tileCount: reducedTileMap.tiles.length });
+})();