diff --git a/.eslintrc.json b/.eslintrc.json
new file mode 100644
index 00000000..daf94399
--- /dev/null
+++ b/.eslintrc.json
@@ -0,0 +1,13 @@
+{
+  "env": {
+    "browser": true,
+    "node": true,
+    "mocha": true
+  },
+  "extends": "eslint:recommended",
+  "rules": {
+    "indent": [ "error", 2 ],
+    "linebreak-style": [ "error", "unix" ],
+    "semi": [ "error", "always" ]
+  }
+}
diff --git a/.jscsrc b/.jscsrc
deleted file mode 100644
index a48833fb..00000000
--- a/.jscsrc
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "disallowSpaceAfterPrefixUnaryOperators": true,
-  "disallowTrailingWhitespace": true,
-  "maximumLineLength": 100,
-  "validateQuoteMarks": true
-}
diff --git a/Makefile b/Makefile
index b36b744e..802cb055 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,7 @@ NPM = npm
 BROWSERIFY = ./node_modules/browserify/bin/cmd.js
 ISTANBUL = ./node_modules/istanbul/lib/cli.js
 JSHINT = ./node_modules/jshint/bin/jshint
-JSCS = ./node_modules/jscs/bin/jscs
+ESLINT = ./node_modules/eslint/bin/eslint.js
 KARMA = ./node_modules/karma/bin/karma
 MOCHA = ./node_modules/mocha/bin/_mocha
 PHANTOMJS = ./node_modules/phantomjs-prebuilt/bin/phantomjs
@@ -30,7 +30,7 @@ DIRS = $(BUILD_DIR) $(BUILD_DIR)/dist $(BUILD_DIR)/dist/demo
 
 .PHONY: all clean browser-test demo-test test dist
 
-all: test
+all: test lint
 
 lib/version.js: package.json
 	@src/release/make-version.js > $@
@@ -38,6 +38,9 @@ lib/version.js: package.json
 $(DIRS):
 	@mkdir -p $@
 
+lint:
+	@$(ESLINT) $(SRC_FILES)
+
 test: browser-test demo-test node-test
 
 browser-test: $(BUILD_FILES)
@@ -45,6 +48,7 @@ browser-test: $(BUILD_FILES)
 	$(KARMA) start karma.core.conf.js --single-run $(KARMA_OPTS)
 
 demo-test: test/demo-test.js | $(BUILD_FILES)
+	echo $(PHANTOMJS) $<
 	$(PHANTOMJS) $<
 
 node-test: test/node-test.js | $(BUILD_FILES)
diff --git a/lib/create-clusters.js b/lib/create-clusters.js
index cb6a182e..03830abc 100644
--- a/lib/create-clusters.js
+++ b/lib/create-clusters.js
@@ -1,23 +1,22 @@
-var util = require("./util"),
-    d3 = require("./d3"),
-    addLabel = require("./label/add-label");
+var util = require("./util");
+var d3 = require("./d3");
+var addLabel = require("./label/add-label");
 
 module.exports = createClusters;
 
 function createClusters(selection, g) {
-  var clusters = g.nodes().filter(function(v) { return util.isSubgraph(g, v); }),
-      svgClusters = selection.selectAll("g.cluster")
-        .data(clusters, function(v) { return v; });
+  var clusters = g.nodes().filter(function(v) { return util.isSubgraph(g, v); });
+  var svgClusters = selection.selectAll("g.cluster")
+    .data(clusters, function(v) { return v; });
 
   svgClusters.selectAll("*").remove();
-  svgClusters.enter()
-    .append("g")
-      .attr("class", "cluster")
-      .attr("id",function(v){
-          var node = g.node(v);
-          return node.id;
-      })
-      .style("opacity", 0);
+  svgClusters.enter().append("g")
+    .attr("class", "cluster")
+    .attr("id",function(v){
+      var node = g.node(v);
+      return node.id;
+    })
+    .style("opacity", 0);
   
   svgClusters = selection.selectAll("g.cluster");
 
@@ -25,8 +24,8 @@ function createClusters(selection, g) {
     .style("opacity", 1);
 
   svgClusters.each(function(v) {
-    var node = g.node(v),
-        thisGroup = d3.select(this);
+    var node = g.node(v);
+    var thisGroup = d3.select(this);
     d3.select(this).append("rect");
     var labelGroup = thisGroup.append("g").attr("class", "label");
     addLabel(labelGroup, node, node.clusterLabelPos);
diff --git a/lib/create-edge-labels.js b/lib/create-edge-labels.js
index 90a5ba1d..d1974558 100644
--- a/lib/create-edge-labels.js
+++ b/lib/create-edge-labels.js
@@ -1,9 +1,9 @@
 "use strict";
 
-var _ = require("./lodash"),
-    addLabel = require("./label/add-label"),
-    util = require("./util"),
-    d3 = require("./d3");
+var _ = require("./lodash");
+var addLabel = require("./label/add-label");
+var util = require("./util");
+var d3 = require("./d3");
 
 module.exports = createEdgeLabels;
 
@@ -13,19 +13,18 @@ function createEdgeLabels(selection, g) {
     .classed("update", true);
 
   svgEdgeLabels.exit().remove();
-  svgEdgeLabels.enter()
-    .append("g")
-      .classed("edgeLabel", true)
-      .style("opacity", 0);
+  svgEdgeLabels.enter().append("g")
+    .classed("edgeLabel", true)
+    .style("opacity", 0);
 
   svgEdgeLabels = selection.selectAll("g.edgeLabel");
 
   svgEdgeLabels.each(function(e) {
     var root = d3.select(this);
-    root.select('.label').remove();
-    var edge = g.edge(e),
-        label = addLabel(root, g.edge(e), 0, 0).classed("label", true),
-        bbox = label.node().getBBox();
+    root.select(".label").remove();
+    var edge = g.edge(e);
+    var label = addLabel(root, g.edge(e), 0, 0).classed("label", true);
+    var bbox = label.node().getBBox();
 
     if (edge.labelId) { label.attr("id", edge.labelId); }
     if (!_.has(edge, "width")) { edge.width = bbox.width; }
diff --git a/lib/create-edge-paths.js b/lib/create-edge-paths.js
index ebaf224a..0b839ace 100644
--- a/lib/create-edge-paths.js
+++ b/lib/create-edge-paths.js
@@ -1,9 +1,9 @@
 "use strict";
 
-var _ = require("./lodash"),
-    intersectNode = require("./intersect/intersect-node"),
-    util = require("./util"),
-    d3 = require("./d3");
+var _ = require("./lodash");
+var intersectNode = require("./intersect/intersect-node");
+var util = require("./util");
+var d3 = require("./d3");
 module.exports = createEdgePaths;
 
 function createEdgePaths(selection, g, arrows) {
@@ -39,7 +39,7 @@ function createEdgePaths(selection, g, arrows) {
 
       var domEdge = d3.select(this)
         .attr("marker-end", function() {
-            return "url(" + makeFragmentRef(location.href, edge.arrowheadId) + ")";
+          return "url(" + makeFragmentRef(location.href, edge.arrowheadId) + ")";
         })
         .style("fill", "none");
 
@@ -52,8 +52,8 @@ function createEdgePaths(selection, g, arrows) {
   svgPaths.selectAll("defs *").remove();
   svgPaths.selectAll("defs")
     .each(function(e) {
-      var edge = g.edge(e),
-          arrowhead = arrows[edge.arrowhead];
+      var edge = g.edge(e);
+      var arrowhead = arrows[edge.arrowhead];
       arrowhead(d3.select(this), edge.arrowheadId, edge, "arrowhead");
     });
 
@@ -66,10 +66,10 @@ function makeFragmentRef(url, fragmentId) {
 }
 
 function calcPoints(g, e) {
-  var edge = g.edge(e),
-      tail = g.node(e.v),
-      head = g.node(e.w),
-      points = edge.points.slice(1, edge.points.length - 1);
+  var edge = g.edge(e);
+  var tail = g.node(e.v);
+  var head = g.node(e.w);
+  var points = edge.points.slice(1, edge.points.length - 1);
   points.unshift(intersectNode(tail, points[0]));
   points.push(intersectNode(head, points[points.length - 1]));
 
@@ -87,25 +87,24 @@ function createLine(edge, points) {
 }
 
 function getCoords(elem) {
-  var bbox = elem.getBBox(),
-      matrix = elem.ownerSVGElement.getScreenCTM()
-        .inverse()
-        .multiply(elem.getScreenCTM())
-        .translate(bbox.width / 2, bbox.height / 2);
+  var bbox = elem.getBBox();
+  var matrix = elem.ownerSVGElement.getScreenCTM()
+    .inverse()
+    .multiply(elem.getScreenCTM())
+    .translate(bbox.width / 2, bbox.height / 2);
   return { x: matrix.e, y: matrix.f };
 }
 
 function enter(svgPaths, g) {
-  var svgPathsEnter = svgPaths.enter()
-    .append("g")
-      .attr("class", "edgePath")
-      .style("opacity", 0);
+  var svgPathsEnter = svgPaths.enter().append("g")
+    .attr("class", "edgePath")
+    .style("opacity", 0);
   svgPathsEnter.append("path")
     .attr("class", "path")
     .attr("d", function(e) {
-      var edge = g.edge(e),
-          sourceElem = g.node(e.v).elem,
-          points = _.range(edge.points.length).map(function() { return getCoords(sourceElem); });
+      var edge = g.edge(e);
+      var sourceElem = g.node(e.v).elem;
+      var points = _.range(edge.points.length).map(function() { return getCoords(sourceElem); });
       return createLine(edge, points);
     });
   svgPathsEnter.append("defs");
diff --git a/lib/create-nodes.js b/lib/create-nodes.js
index a3e1d790..3a9df714 100644
--- a/lib/create-nodes.js
+++ b/lib/create-nodes.js
@@ -1,9 +1,9 @@
 "use strict";
 
-var _ = require("./lodash"),
-    addLabel = require("./label/add-label"),
-    util = require("./util"),
-    d3 = require("./d3");
+var _ = require("./lodash");
+var addLabel = require("./label/add-label");
+var util = require("./util");
+var d3 = require("./d3");
 
 module.exports = createNodes;
 
@@ -15,24 +15,23 @@ function createNodes(selection, g, shapes) {
 
   svgNodes.exit().remove();
 
-  svgNodes.enter()
-    .append("g")
-      .attr("class", "node")
-      .style("opacity", 0);
+  svgNodes.enter().append("g")
+    .attr("class", "node")
+    .style("opacity", 0);
 
   svgNodes = selection.selectAll("g.node"); 
 
   svgNodes.each(function(v) {
-    var node = g.node(v),
-        thisGroup = d3.select(this);
+    var node = g.node(v);
+    var thisGroup = d3.select(this);
     util.applyClass(thisGroup, node["class"],
       (thisGroup.classed("update") ? "update " : "") + "node");
 
     thisGroup.select("g.label").remove();
-    var labelGroup = thisGroup.append("g").attr("class", "label"),
-        labelDom = addLabel(labelGroup, node),
-        shape = shapes[node.shape],
-        bbox = _.pick(labelDom.node().getBBox(), "width", "height");
+    var labelGroup = thisGroup.append("g").attr("class", "label");
+    var labelDom = addLabel(labelGroup, node);
+    var shape = shapes[node.shape];
+    var bbox = _.pick(labelDom.node().getBBox(), "width", "height");
 
     node.elem = this;
 
diff --git a/lib/d3.js b/lib/d3.js
index ad0003cd..1a825595 100644
--- a/lib/d3.js
+++ b/lib/d3.js
@@ -7,6 +7,7 @@ if (!d3) {
       d3 = require("d3");
     }
     catch (e) {
+      // continue regardless of error
     }
   }
 }
diff --git a/lib/dagre.js b/lib/dagre.js
index 420231ed..8c56913f 100644
--- a/lib/dagre.js
+++ b/lib/dagre.js
@@ -5,7 +5,9 @@ var dagre;
 if (typeof require === "function") {
   try {
     dagre = require("dagre");
-  } catch (e) {}
+  } catch (e) {
+    // continue regardless of error
+  }
 }
 
 if (!dagre) {
diff --git a/lib/graphlib.js b/lib/graphlib.js
index e161cf25..591f703c 100644
--- a/lib/graphlib.js
+++ b/lib/graphlib.js
@@ -5,7 +5,10 @@ var graphlib;
 if (typeof require === "function") {
   try {
     graphlib = require("graphlib");
-  } catch (e) {}
+  }
+  catch (e) {
+    // continue regardless of error
+  }
 }
 
 if (!graphlib) {
diff --git a/lib/intersect/intersect-polygon.js b/lib/intersect/intersect-polygon.js
index 9206ecb4..b84a9df8 100644
--- a/lib/intersect/intersect-polygon.js
+++ b/lib/intersect/intersect-polygon.js
@@ -1,3 +1,5 @@
+/* eslint "no-console": off */
+
 var intersectLine = require("./intersect-line");
 
 module.exports = intersectPolygon;
@@ -12,8 +14,8 @@ function intersectPolygon(node, polyPoints, point) {
 
   var intersections = [];
 
-  var minX = Number.POSITIVE_INFINITY,
-      minY = Number.POSITIVE_INFINITY;
+  var minX = Number.POSITIVE_INFINITY;
+  var minY = Number.POSITIVE_INFINITY;
   polyPoints.forEach(function(entry) {
     minX = Math.min(minX, entry.x);
     minY = Math.min(minY, entry.y);
@@ -40,13 +42,13 @@ function intersectPolygon(node, polyPoints, point) {
   if (intersections.length > 1) {
     // More intersections, find the one nearest to edge end point
     intersections.sort(function(p, q) {
-      var pdx = p.x - point.x,
-          pdy = p.y - point.y,
-          distp = Math.sqrt(pdx * pdx + pdy * pdy),
+      var pdx = p.x - point.x;
+      var pdy = p.y - point.y;
+      var distp = Math.sqrt(pdx * pdx + pdy * pdy);
 
-          qdx = q.x - point.x,
-          qdy = q.y - point.y,
-          distq = Math.sqrt(qdx * qdx + qdy * qdy);
+      var qdx = q.x - point.x;
+      var qdy = q.y - point.y;
+      var distq = Math.sqrt(qdx * qdx + qdy * qdy);
 
       return (distp < distq) ? -1 : (distp === distq ? 0 : 1);
     });
diff --git a/lib/label/add-html-label.js b/lib/label/add-html-label.js
index 013849e9..d9a59415 100644
--- a/lib/label/add-html-label.js
+++ b/lib/label/add-html-label.js
@@ -5,7 +5,7 @@ module.exports = addHtmlLabel;
 function addHtmlLabel(root, node) {
   var fo = root
     .append("foreignObject")
-      .attr("width", "100000");
+    .attr("width", "100000");
 
   var div = fo
     .append("xhtml:div");
@@ -13,14 +13,14 @@ function addHtmlLabel(root, node) {
 
   var label = node.label;
   switch(typeof label) {
-    case "function":
-      div.insert(label);
-      break;
-    case "object":
-      // Currently we assume this is a DOM object.
-      div.insert(function() { return label; });
-      break;
-    default: div.html(label);
+  case "function":
+    div.insert(label);
+    break;
+  case "object":
+    // Currently we assume this is a DOM object.
+    div.insert(function() { return label; });
+    break;
+  default: div.html(label);
   }
 
   util.applyStyle(div, node.labelStyle);
diff --git a/lib/label/add-label.js b/lib/label/add-label.js
index 64467628..d06be920 100644
--- a/lib/label/add-label.js
+++ b/lib/label/add-label.js
@@ -1,6 +1,6 @@
-var addTextLabel = require("./add-text-label"),
-    addHtmlLabel = require("./add-html-label"),
-    addSVGLabel  = require("./add-svg-label");
+var addTextLabel = require("./add-text-label");
+var addHtmlLabel = require("./add-html-label");
+var addSVGLabel  = require("./add-svg-label");
 
 module.exports = addLabel;
 
@@ -21,17 +21,18 @@ function addLabel(root, node, location) {
   var labelBBox = labelSvg.node().getBBox();
   var y;
   switch(location) {
-    case "top":
-      y = (-node.height / 2);
-      break;
-    case "bottom":
-      y = (node.height / 2) - labelBBox.height;
-      break;
-    default:
-      y = (-labelBBox.height / 2);
+  case "top":
+    y = (-node.height / 2);
+    break;
+  case "bottom":
+    y = (node.height / 2) - labelBBox.height;
+    break;
+  default:
+    y = (-labelBBox.height / 2);
   }
-  labelSvg.attr("transform",
-                "translate(" + (-labelBBox.width / 2) + "," + y + ")");
+  labelSvg.attr(
+    "transform",
+    "translate(" + (-labelBBox.width / 2) + "," + y + ")");
 
   return labelSvg;
 }
diff --git a/lib/label/add-text-label.js b/lib/label/add-text-label.js
index d6a8e5fc..b25e7f09 100644
--- a/lib/label/add-text-label.js
+++ b/lib/label/add-text-label.js
@@ -10,12 +10,11 @@ function addTextLabel(root, node) {
 
   var lines = processEscapeSequences(node.label).split("\n");
   for (var i = 0; i < lines.length; i++) {
-    domNode
-      .append("tspan")
-        .attr("xml:space", "preserve")
-        .attr("dy", "1em")
-        .attr("x", "1")
-        .text(lines[i]);
+    domNode.append("tspan")
+      .attr("xml:space", "preserve")
+      .attr("dy", "1em")
+      .attr("x", "1")
+      .text(lines[i]);
   }
 
   util.applyStyle(domNode, node.labelStyle);
@@ -24,15 +23,15 @@ function addTextLabel(root, node) {
 }
 
 function processEscapeSequences(text) {
-  var newText = "",
-      escaped = false,
-      ch;
+  var newText = "";
+  var escaped = false;
+  var ch;
   for (var i = 0; i < text.length; ++i) {
     ch = text[i];
     if (escaped) {
       switch(ch) {
-        case "n": newText += "\n"; break;
-        default: newText += ch;
+      case "n": newText += "\n"; break;
+      default: newText += ch;
       }
       escaped = false;
     } else if (ch === "\\") {
diff --git a/lib/lodash.js b/lib/lodash.js
index f98a20fb..6c26fe26 100644
--- a/lib/lodash.js
+++ b/lib/lodash.js
@@ -14,7 +14,10 @@ if (typeof require === "function") {
       range: require("lodash/range"),
       uniqueId: require("lodash/uniqueId")
     };
-  } catch (e) {}
+  }
+  catch (e) {
+    // continue regardless of error
+  }
 }
 
 if (!lodash) {
diff --git a/lib/position-clusters.js b/lib/position-clusters.js
index 21d44053..6dee6acf 100644
--- a/lib/position-clusters.js
+++ b/lib/position-clusters.js
@@ -1,7 +1,7 @@
 "use strict";
 
-var util = require("./util"),
-    d3 = require("./d3");
+var util = require("./util");
+var d3 = require("./d3");
 
 module.exports = positionClusters;
 
@@ -16,19 +16,18 @@ function positionClusters(selection, g) {
   created.attr("transform", translate);
 
   util.applyTransition(selection, g)
-      .style("opacity", 1)
-      .attr("transform", translate);
+    .style("opacity", 1)
+    .attr("transform", translate);
 
   util.applyTransition(created.selectAll("rect"), g)
-      .attr("width", function(v) { return g.node(v).width; })
-      .attr("height", function(v) { return g.node(v).height; })
-      .attr("x", function(v) {
-        var node = g.node(v);
-        return -node.width / 2;
-      })
-      .attr("y", function(v) {
-        var node = g.node(v);
-        return -node.height / 2;
-      });
-
+    .attr("width", function(v) { return g.node(v).width; })
+    .attr("height", function(v) { return g.node(v).height; })
+    .attr("x", function(v) {
+      var node = g.node(v);
+      return -node.width / 2;
+    })
+    .attr("y", function(v) {
+      var node = g.node(v);
+      return -node.height / 2;
+    });
 }
diff --git a/lib/position-edge-labels.js b/lib/position-edge-labels.js
index 6dafb54f..7f3c50d6 100644
--- a/lib/position-edge-labels.js
+++ b/lib/position-edge-labels.js
@@ -1,8 +1,8 @@
 "use strict";
 
-var util = require("./util"),
-    d3 = require("./d3"),
-    _ = require("./lodash");
+var util = require("./util");
+var d3 = require("./d3");
+var _ = require("./lodash");
 
 module.exports = positionEdgeLabels;
 
diff --git a/lib/position-nodes.js b/lib/position-nodes.js
index cd3c3498..1478c99b 100644
--- a/lib/position-nodes.js
+++ b/lib/position-nodes.js
@@ -1,7 +1,7 @@
 "use strict";
 
-var util = require("./util"),
-    d3 = require("./d3");
+var util = require("./util");
+var d3 = require("./d3");
 
 module.exports = positionNodes;
 
diff --git a/lib/render.js b/lib/render.js
index 894a4dd3..36d235c7 100644
--- a/lib/render.js
+++ b/lib/render.js
@@ -1,29 +1,29 @@
-var _ = require("./lodash"),
-    d3 = require("./d3"),
-    layout = require("./dagre").layout;
+var _ = require("./lodash");
+var d3 = require("./d3");
+var layout = require("./dagre").layout;
 
 module.exports = render;
 
 // This design is based on http://bost.ocks.org/mike/chart/.
 function render() {
-  var createNodes = require("./create-nodes"),
-      createClusters = require("./create-clusters"),
-      createEdgeLabels = require("./create-edge-labels"),
-      createEdgePaths = require("./create-edge-paths"),
-      positionNodes = require("./position-nodes"),
-      positionEdgeLabels = require("./position-edge-labels"),
-      positionClusters = require("./position-clusters"),
-      shapes = require("./shapes"),
-      arrows = require("./arrows");
+  var createNodes = require("./create-nodes");
+  var createClusters = require("./create-clusters");
+  var createEdgeLabels = require("./create-edge-labels");
+  var createEdgePaths = require("./create-edge-paths");
+  var positionNodes = require("./position-nodes");
+  var positionEdgeLabels = require("./position-edge-labels");
+  var positionClusters = require("./position-clusters");
+  var shapes = require("./shapes");
+  var arrows = require("./arrows");
 
   var fn = function(svg, g) {
     preProcessGraph(g);
 
-    var outputGroup = createOrSelectGroup(svg, "output"),
-        clustersGroup = createOrSelectGroup(outputGroup, "clusters"),
-        edgePathsGroup = createOrSelectGroup(outputGroup, "edgePaths"),
-        edgeLabels = createEdgeLabels(createOrSelectGroup(outputGroup, "edgeLabels"), g),
-        nodes = createNodes(createOrSelectGroup(outputGroup, "nodes"), g, shapes);
+    var outputGroup = createOrSelectGroup(svg, "output");
+    var clustersGroup = createOrSelectGroup(outputGroup, "clusters");
+    var edgePathsGroup = createOrSelectGroup(outputGroup, "edgePaths");
+    var edgeLabels = createEdgeLabels(createOrSelectGroup(outputGroup, "edgeLabels"), g);
+    var nodes = createNodes(createOrSelectGroup(outputGroup, "nodes"), g, shapes);
 
     layout(g);
 
diff --git a/lib/shapes.js b/lib/shapes.js
index 556c4e0c..23e8031d 100644
--- a/lib/shapes.js
+++ b/lib/shapes.js
@@ -1,9 +1,9 @@
 "use strict";
 
-var intersectRect = require("./intersect/intersect-rect"),
-    intersectEllipse = require("./intersect/intersect-ellipse"),
-    intersectCircle = require("./intersect/intersect-circle"),
-    intersectPolygon = require("./intersect/intersect-polygon");
+var intersectRect = require("./intersect/intersect-rect");
+var intersectEllipse = require("./intersect/intersect-ellipse");
+var intersectCircle = require("./intersect/intersect-circle");
+var intersectPolygon = require("./intersect/intersect-polygon");
 
 module.exports = {
   rect: rect,
@@ -14,12 +14,12 @@ module.exports = {
 
 function rect(parent, bbox, node) {
   var shapeSvg = parent.insert("rect", ":first-child")
-        .attr("rx", node.rx)
-        .attr("ry", node.ry)
-        .attr("x", -bbox.width / 2)
-        .attr("y", -bbox.height / 2)
-        .attr("width", bbox.width)
-        .attr("height", bbox.height);
+    .attr("rx", node.rx)
+    .attr("ry", node.ry)
+    .attr("x", -bbox.width / 2)
+    .attr("y", -bbox.height / 2)
+    .attr("width", bbox.width)
+    .attr("height", bbox.height);
 
   node.intersect = function(point) {
     return intersectRect(node, point);
@@ -29,13 +29,13 @@ function rect(parent, bbox, node) {
 }
 
 function ellipse(parent, bbox, node) {
-  var rx = bbox.width / 2,
-      ry = bbox.height / 2,
-      shapeSvg = parent.insert("ellipse", ":first-child")
-        .attr("x", -bbox.width / 2)
-        .attr("y", -bbox.height / 2)
-        .attr("rx", rx)
-        .attr("ry", ry);
+  var rx = bbox.width / 2;
+  var ry = bbox.height / 2;
+  var shapeSvg = parent.insert("ellipse", ":first-child")
+    .attr("x", -bbox.width / 2)
+    .attr("y", -bbox.height / 2)
+    .attr("rx", rx)
+    .attr("ry", ry);
 
   node.intersect = function(point) {
     return intersectEllipse(node, rx, ry, point);
@@ -45,11 +45,11 @@ function ellipse(parent, bbox, node) {
 }
 
 function circle(parent, bbox, node) {
-  var r = Math.max(bbox.width, bbox.height) / 2,
-      shapeSvg = parent.insert("circle", ":first-child")
-        .attr("x", -bbox.width / 2)
-        .attr("y", -bbox.height / 2)
-        .attr("r", r);
+  var r = Math.max(bbox.width, bbox.height) / 2;
+  var shapeSvg = parent.insert("circle", ":first-child")
+    .attr("x", -bbox.width / 2)
+    .attr("y", -bbox.height / 2)
+    .attr("r", r);
 
   node.intersect = function(point) {
     return intersectCircle(node, r, point);
@@ -62,16 +62,16 @@ function circle(parent, bbox, node) {
 // the function to calculate the diamond shape from:
 // http://mathforum.org/kb/message.jspa?messageID=3750236
 function diamond(parent, bbox, node) {
-  var w = (bbox.width * Math.SQRT2) / 2,
-      h = (bbox.height * Math.SQRT2) / 2,
-      points = [
-        { x:  0, y: -h },
-        { x: -w, y:  0 },
-        { x:  0, y:  h },
-        { x:  w, y:  0 }
-      ],
-      shapeSvg = parent.insert("polygon", ":first-child")
-        .attr("points", points.map(function(p) { return p.x + "," + p.y; }).join(" "));
+  var w = (bbox.width * Math.SQRT2) / 2;
+  var h = (bbox.height * Math.SQRT2) / 2;
+  var points = [
+    { x:  0, y: -h },
+    { x: -w, y:  0 },
+    { x:  0, y:  h },
+    { x:  w, y:  0 }
+  ];
+  var shapeSvg = parent.insert("polygon", ":first-child")
+    .attr("points", points.map(function(p) { return p.x + "," + p.y; }).join(" "));
 
   node.intersect = function(p) {
     return intersectPolygon(node, points, p);
diff --git a/package-lock.json b/package-lock.json
index f35542df..47dd1f4f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,9 +1,66 @@
 {
   "name": "dagre-d3",
-  "version": "0.6.3",
+  "version": "0.6.4-pre",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "@babel/code-frame": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.0.0.tgz",
+      "integrity": "sha512-OfC2uemaknXr87bdLUkWog7nYuliM9Ij5HUcajsVcMCpQrcLmtxRbVFTIqmcSkSeYRBFBRxs2FiUqFJDLdiebA==",
+      "dev": true,
+      "requires": {
+        "@babel/highlight": "^7.0.0"
+      }
+    },
+    "@babel/highlight": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.0.0.tgz",
+      "integrity": "sha512-UFMC4ZeFC48Tpvj7C8UgLvtkaUuovQX+5xNWrsIoMG8o2z+XFKjKaN9iVmS84dPwVN00W4wPmqvYoZF3EGAsfw==",
+      "dev": true,
+      "requires": {
+        "chalk": "^2.0.0",
+        "esutils": "^2.0.2",
+        "js-tokens": "^4.0.0"
+      },
+      "dependencies": {
+        "ansi-styles": {
+          "version": "3.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+          "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+          "dev": true,
+          "requires": {
+            "color-convert": "^1.9.0"
+          }
+        },
+        "chalk": {
+          "version": "2.4.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^3.2.1",
+            "escape-string-regexp": "^1.0.5",
+            "supports-color": "^5.3.0"
+          }
+        },
+        "has-flag": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+          "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
+          "dev": true
+        },
+        "supports-color": {
+          "version": "5.5.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+          "dev": true,
+          "requires": {
+            "has-flag": "^3.0.0"
+          }
+        }
+      }
+    },
     "JSONStream": {
       "version": "1.3.5",
       "resolved": "https://registry.npmjs.org/JSONStream/-/JSONStream-1.3.5.tgz",
@@ -42,6 +99,12 @@
       "integrity": "sha512-d3OEjQV4ROpoflsnUA8HozoIR504TFxNivYEUi6uwz0IYhBkTDXGuWlNdMtybRt3nqVx/L6XqMt0FxkXuWKZhw==",
       "dev": true
     },
+    "acorn-jsx": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.0.1.tgz",
+      "integrity": "sha512-HJ7CfNHrfJLlNTzIEUTj43LNWGkqpRLxm3YjAlcD0ACydk9XynzYsCBHxut+iqt+1aBXkx9UP/w/ZqMr13XIzg==",
+      "dev": true
+    },
     "acorn-node": {
       "version": "1.6.2",
       "resolved": "https://registry.npmjs.org/acorn-node/-/acorn-node-1.6.2.tgz",
@@ -85,6 +148,12 @@
       "dev": true,
       "optional": true
     },
+    "ansi-escapes": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-3.2.0.tgz",
+      "integrity": "sha512-cBhpre4ma+U0T1oM5fXg7Dy1Jw7zzwv7lt/GoCpr+hDQJoYnKVPLL4dCvSEFMmQurOQvSrwT7SL/DAlhBI97RQ==",
+      "dev": true
+    },
     "ansi-regex": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
@@ -278,6 +347,12 @@
       "integrity": "sha1-WWZ/QfrdTyDMvCu5a41Pf3jsA2c=",
       "dev": true
     },
+    "astral-regex": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/astral-regex/-/astral-regex-1.0.0.tgz",
+      "integrity": "sha512-+Ryf6g3BKoRc7jfp7ad8tM4TtMiaWvbF/1/sQcZPkkS7ag3D5nMBCe2UfOTONtAkaG0tO0ij3C5Lwmf1EiyjHg==",
+      "dev": true
+    },
     "async": {
       "version": "1.5.2",
       "resolved": "http://registry.npmjs.org/async/-/async-1.5.2.tgz",
@@ -905,6 +980,12 @@
       "integrity": "sha1-KAOY5dZkvXQDi28JBRU+borxvCA=",
       "dev": true
     },
+    "callsites": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/callsites/-/callsites-3.0.0.tgz",
+      "integrity": "sha512-tWnkwu9YEq2uzlBDI4RcLn8jrFvF9AOi8PxDNU3hZZjJcjkcRAq3vCI+vZcg1SuxISDYe86k9VZFwAxDiJGoAw==",
+      "dev": true
+    },
     "camelcase": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-3.0.0.tgz",
@@ -962,6 +1043,12 @@
         "supports-color": "^2.0.0"
       }
     },
+    "chardet": {
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/chardet/-/chardet-0.7.0.tgz",
+      "integrity": "sha512-mT8iDcrh03qDGRRmoA2hmBJnxpllMR+0/0qlzjqZES6NdiWDcZkCNAk4rPFZ9Q85r27unkiNNg8ZOiwZXBHwcA==",
+      "dev": true
+    },
     "check-error": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/check-error/-/check-error-1.0.2.tgz",
@@ -1038,6 +1125,21 @@
         "glob": "^7.1.1"
       }
     },
+    "cli-cursor": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-2.1.0.tgz",
+      "integrity": "sha1-s12sN2R5+sw+lHR9QdDQ9SOP/LU=",
+      "dev": true,
+      "requires": {
+        "restore-cursor": "^2.0.0"
+      }
+    },
+    "cli-width": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/cli-width/-/cli-width-2.2.0.tgz",
+      "integrity": "sha1-/xnt6Kml5XkyQUewwR8PvLq+1jk=",
+      "dev": true
+    },
     "cliui": {
       "version": "3.2.0",
       "resolved": "https://registry.npmjs.org/cliui/-/cliui-3.2.0.tgz",
@@ -1094,6 +1196,21 @@
         "object-visit": "^1.0.0"
       }
     },
+    "color-convert": {
+      "version": "1.9.3",
+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
+      "integrity": "sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==",
+      "dev": true,
+      "requires": {
+        "color-name": "1.1.3"
+      }
+    },
+    "color-name": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
+      "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=",
+      "dev": true
+    },
     "colors": {
       "version": "1.0.3",
       "resolved": "http://registry.npmjs.org/colors/-/colors-1.0.3.tgz",
@@ -1289,6 +1406,19 @@
         "sha.js": "^2.4.8"
       }
     },
+    "cross-spawn": {
+      "version": "6.0.5",
+      "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
+      "integrity": "sha512-eTVLrBSt7fjbDygz805pMnstIs2VTBNkRm0qxZd+M7A5XDdxVRWO5MxGBXZhjY4cqLYLdtrGqRf8mBPmzwSpWQ==",
+      "dev": true,
+      "requires": {
+        "nice-try": "^1.0.4",
+        "path-key": "^2.0.1",
+        "semver": "^5.5.0",
+        "shebang-command": "^1.2.0",
+        "which": "^1.2.9"
+      }
+    },
     "crypto-browserify": {
       "version": "3.12.0",
       "resolved": "https://registry.npmjs.org/crypto-browserify/-/crypto-browserify-3.12.0.tgz",
@@ -1810,6 +1940,15 @@
         "randombytes": "^2.0.0"
       }
     },
+    "doctrine": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/doctrine/-/doctrine-3.0.0.tgz",
+      "integrity": "sha512-yS+Q5i3hBf7GBkd4KG8a7eBNNWNGLTaEwwYWUijIYM7zrlYDM0BFXHjjPWlWZ1Rg7UaddZeIDmi9jF3HmqiQ2w==",
+      "dev": true,
+      "requires": {
+        "esutils": "^2.0.2"
+      }
+    },
     "dom-serialize": {
       "version": "2.2.1",
       "resolved": "https://registry.npmjs.org/dom-serialize/-/dom-serialize-2.2.1.tgz",
@@ -1935,6 +2074,12 @@
         "minimalistic-crypto-utils": "^1.0.0"
       }
     },
+    "emoji-regex": {
+      "version": "7.0.3",
+      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-7.0.3.tgz",
+      "integrity": "sha512-CwBLREIQ7LvYFB0WyRvwhq5N5qPhc6PMjD6bYggFlI5YyDgl+0vxq5VHbMOFqLg7hfWzmu8T5Z1QofhmTIhItA==",
+      "dev": true
+    },
     "encodeurl": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/encodeurl/-/encodeurl-1.0.2.tgz",
@@ -2051,12 +2196,230 @@
         }
       }
     },
+    "eslint": {
+      "version": "5.14.0",
+      "resolved": "https://registry.npmjs.org/eslint/-/eslint-5.14.0.tgz",
+      "integrity": "sha512-jrOhiYyENRrRnWlMYANlGZTqb89r2FuRT+615AabBoajhNjeh9ywDNlh2LU9vTqf0WYN+L3xdXuIi7xuj/tK9w==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.0.0",
+        "ajv": "^6.9.1",
+        "chalk": "^2.1.0",
+        "cross-spawn": "^6.0.5",
+        "debug": "^4.0.1",
+        "doctrine": "^3.0.0",
+        "eslint-scope": "^4.0.0",
+        "eslint-utils": "^1.3.1",
+        "eslint-visitor-keys": "^1.0.0",
+        "espree": "^5.0.1",
+        "esquery": "^1.0.1",
+        "esutils": "^2.0.2",
+        "file-entry-cache": "^5.0.1",
+        "functional-red-black-tree": "^1.0.1",
+        "glob": "^7.1.2",
+        "globals": "^11.7.0",
+        "ignore": "^4.0.6",
+        "import-fresh": "^3.0.0",
+        "imurmurhash": "^0.1.4",
+        "inquirer": "^6.2.2",
+        "js-yaml": "^3.12.0",
+        "json-stable-stringify-without-jsonify": "^1.0.1",
+        "levn": "^0.3.0",
+        "lodash": "^4.17.11",
+        "minimatch": "^3.0.4",
+        "mkdirp": "^0.5.1",
+        "natural-compare": "^1.4.0",
+        "optionator": "^0.8.2",
+        "path-is-inside": "^1.0.2",
+        "progress": "^2.0.0",
+        "regexpp": "^2.0.1",
+        "semver": "^5.5.1",
+        "strip-ansi": "^4.0.0",
+        "strip-json-comments": "^2.0.1",
+        "table": "^5.2.3",
+        "text-table": "^0.2.0"
+      },
+      "dependencies": {
+        "ajv": {
+          "version": "6.9.1",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.9.1.tgz",
+          "integrity": "sha512-XDN92U311aINL77ieWHmqCcNlwjoP5cHXDxIxbf2MaPYuCXOHS7gHH8jktxeK5omgd52XbSTX6a4Piwd1pQmzA==",
+          "dev": true,
+          "requires": {
+            "fast-deep-equal": "^2.0.1",
+            "fast-json-stable-stringify": "^2.0.0",
+            "json-schema-traverse": "^0.4.1",
+            "uri-js": "^4.2.2"
+          }
+        },
+        "ansi-regex": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
+          "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
+          "dev": true
+        },
+        "ansi-styles": {
+          "version": "3.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+          "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+          "dev": true,
+          "requires": {
+            "color-convert": "^1.9.0"
+          }
+        },
+        "chalk": {
+          "version": "2.4.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^3.2.1",
+            "escape-string-regexp": "^1.0.5",
+            "supports-color": "^5.3.0"
+          }
+        },
+        "debug": {
+          "version": "4.1.1",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
+          "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+          "dev": true,
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        },
+        "has-flag": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+          "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
+          "dev": true
+        },
+        "ms": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
+          "integrity": "sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg==",
+          "dev": true
+        },
+        "progress": {
+          "version": "2.0.3",
+          "resolved": "https://registry.npmjs.org/progress/-/progress-2.0.3.tgz",
+          "integrity": "sha512-7PiHtLll5LdnKIMw100I+8xJXR5gW2QwWYkT6iJva0bXitZKa/XMrSbdmg3r2Xnaidz9Qumd0VPaMrZlF9V9sA==",
+          "dev": true
+        },
+        "strip-ansi": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
+          "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^3.0.0"
+          }
+        },
+        "strip-json-comments": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
+          "integrity": "sha1-PFMZQukIwml8DsNEhYwobHygpgo=",
+          "dev": true
+        },
+        "supports-color": {
+          "version": "5.5.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+          "dev": true,
+          "requires": {
+            "has-flag": "^3.0.0"
+          }
+        }
+      }
+    },
+    "eslint-scope": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/eslint-scope/-/eslint-scope-4.0.0.tgz",
+      "integrity": "sha512-1G6UTDi7Jc1ELFwnR58HV4fK9OQK4S6N985f166xqXxpjU6plxFISJa2Ba9KCQuFa8RCnj/lSFJbHo7UFDBnUA==",
+      "dev": true,
+      "requires": {
+        "esrecurse": "^4.1.0",
+        "estraverse": "^4.1.1"
+      },
+      "dependencies": {
+        "estraverse": {
+          "version": "4.2.0",
+          "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-4.2.0.tgz",
+          "integrity": "sha1-De4/7TH81GlhjOc0IJn8GvoL2xM=",
+          "dev": true
+        }
+      }
+    },
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       "resolved": "https://registry.npmjs.org/nan/-/nan-2.11.1.tgz",
@@ -4712,12 +5398,24 @@
         "to-regex": "^3.0.1"
       }
     },
+    "natural-compare": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/natural-compare/-/natural-compare-1.4.0.tgz",
+      "integrity": "sha1-Sr6/7tdUHywnrPspvbvRXI1bpPc=",
+      "dev": true
+    },
     "negotiator": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.1.tgz",
       "integrity": "sha1-KzJxhOiZIQEXeyhWP7XnECrNDKk=",
       "dev": true
     },
+    "nice-try": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/nice-try/-/nice-try-1.0.5.tgz",
+      "integrity": "sha512-1nh45deeb5olNY7eX82BkPO7SSxR5SSYJiPTrTdFUVYwAl8CKMA5N9PjTYkHiRjisVcxcQ1HXdLhx2qxxJzLNQ==",
+      "dev": true
+    },
     "nopt": {
       "version": "3.0.6",
       "resolved": "https://registry.npmjs.org/nopt/-/nopt-3.0.6.tgz",
@@ -4861,6 +5559,15 @@
         "wrappy": "1"
       }
     },
+    "onetime": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/onetime/-/onetime-2.0.1.tgz",
+      "integrity": "sha1-BnQoIw/WdEOyeUsiu6UotoZ5YtQ=",
+      "dev": true,
+      "requires": {
+        "mimic-fn": "^1.0.0"
+      }
+    },
     "openurl": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/openurl/-/openurl-1.1.1.tgz",
@@ -4958,6 +5665,15 @@
       "integrity": "sha512-lQe48YPsMJAig+yngZ87Lus+NF+3mtu7DVOBu6b/gHO1YpKwIj5AWjZ/TOS7i46HD/UixzWb1zeWDZfGZ3iYcg==",
       "dev": true
     },
+    "parent-module": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/parent-module/-/parent-module-1.0.0.tgz",
+      "integrity": "sha512-8Mf5juOMmiE4FcmzYc4IaiS9L3+9paz2KOiXzkRviCP6aDmN49Hz6EMWz0lGNp9pX80GvvAuLADtyGfW/Em3TA==",
+      "dev": true,
+      "requires": {
+        "callsites": "^3.0.0"
+      }
+    },
     "parents": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/parents/-/parents-1.0.1.tgz",
@@ -5081,6 +5797,12 @@
       "integrity": "sha1-NlQX3t5EQw0cEa9hAn+s8HS9/FM=",
       "dev": true
     },
+    "path-key": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/path-key/-/path-key-2.0.1.tgz",
+      "integrity": "sha1-QRyttXTFoUDTpLGRDUDYDMn0C0A=",
+      "dev": true
+    },
     "path-parse": {
       "version": "1.0.6",
       "resolved": "https://registry.npmjs.org/path-parse/-/path-parse-1.0.6.tgz",
@@ -5501,6 +6223,12 @@
         "safe-regex": "^1.1.0"
       }
     },
+    "regexpp": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/regexpp/-/regexpp-2.0.1.tgz",
+      "integrity": "sha512-lv0M6+TkDVniA3aD1Eg0DVpfU/booSu7Eev3TDO/mZKHBfVjgCGTV4t4buppESEYDtkArYFOxTJWv6S5C+iaNw==",
+      "dev": true
+    },
     "remove-trailing-separator": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/remove-trailing-separator/-/remove-trailing-separator-1.1.0.tgz",
@@ -5612,6 +6340,12 @@
         "path-parse": "^1.0.5"
       }
     },
+    "resolve-from": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-4.0.0.tgz",
+      "integrity": "sha512-pb/MYmXstAkysRFx8piNI1tGFNQIFA3vkE3Gq4EuA1dF6gHp/+vgZqsCGJapvy8N3Q+4o7FwvquPJcnZ7RYy4g==",
+      "dev": true
+    },
     "resolve-url": {
       "version": "0.2.1",
       "resolved": "https://registry.npmjs.org/resolve-url/-/resolve-url-0.2.1.tgz",
@@ -5639,6 +6373,16 @@
         }
       }
     },
+    "restore-cursor": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/restore-cursor/-/restore-cursor-2.0.0.tgz",
+      "integrity": "sha1-n37ih/gv0ybU/RYpI9YhKe7g368=",
+      "dev": true,
+      "requires": {
+        "onetime": "^2.0.0",
+        "signal-exit": "^3.0.2"
+      }
+    },
     "ret": {
       "version": "0.1.15",
       "resolved": "https://registry.npmjs.org/ret/-/ret-0.1.15.tgz",
@@ -5670,6 +6414,15 @@
         "inherits": "^2.0.1"
       }
     },
+    "run-async": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/run-async/-/run-async-2.3.0.tgz",
+      "integrity": "sha1-A3GrSuC91yDUFm19/aZP96RFpsA=",
+      "dev": true,
+      "requires": {
+        "is-promise": "^2.1.0"
+      }
+    },
     "rw": {
       "version": "1.3.3",
       "resolved": "https://registry.npmjs.org/rw/-/rw-1.3.3.tgz",
@@ -5853,6 +6606,21 @@
         "sha.js": "~2.4.4"
       }
     },
+    "shebang-command": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-1.2.0.tgz",
+      "integrity": "sha1-RKrGW2lbAzmJaMOfNj/uXer98eo=",
+      "dev": true,
+      "requires": {
+        "shebang-regex": "^1.0.0"
+      }
+    },
+    "shebang-regex": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/shebang-regex/-/shebang-regex-1.0.0.tgz",
+      "integrity": "sha1-2kL0l0DAtC2yypcoVxyxkMmO/qM=",
+      "dev": true
+    },
     "shell-quote": {
       "version": "1.6.1",
       "resolved": "https://registry.npmjs.org/shell-quote/-/shell-quote-1.6.1.tgz",
@@ -5883,6 +6651,34 @@
       "integrity": "sha1-c0TLuLbib7J9ZrL8hvn21Zl1IcY=",
       "dev": true
     },
+    "slice-ansi": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/slice-ansi/-/slice-ansi-2.1.0.tgz",
+      "integrity": "sha512-Qu+VC3EwYLldKa1fCxuuvULvSJOKEgk9pi8dZeCVK7TqBfUNTH4sFkk4joj8afVSfAYgJoSOetjx9QWOJ5mYoQ==",
+      "dev": true,
+      "requires": {
+        "ansi-styles": "^3.2.0",
+        "astral-regex": "^1.0.0",
+        "is-fullwidth-code-point": "^2.0.0"
+      },
+      "dependencies": {
+        "ansi-styles": {
+          "version": "3.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+          "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+          "dev": true,
+          "requires": {
+            "color-convert": "^1.9.0"
+          }
+        },
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
+          "dev": true
+        }
+      }
+    },
     "snapdragon": {
       "version": "0.8.2",
       "resolved": "https://registry.npmjs.org/snapdragon/-/snapdragon-0.8.2.tgz",
@@ -6342,6 +7138,64 @@
         "acorn-node": "^1.2.0"
       }
     },
+    "table": {
+      "version": "5.2.3",
+      "resolved": "https://registry.npmjs.org/table/-/table-5.2.3.tgz",
+      "integrity": "sha512-N2RsDAMvDLvYwFcwbPyF3VmVSSkuF+G1e+8inhBLtHpvwXGw4QRPEZhihQNeEN0i1up6/f6ObCJXNdlRG3YVyQ==",
+      "dev": true,
+      "requires": {
+        "ajv": "^6.9.1",
+        "lodash": "^4.17.11",
+        "slice-ansi": "^2.1.0",
+        "string-width": "^3.0.0"
+      },
+      "dependencies": {
+        "ajv": {
+          "version": "6.9.1",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.9.1.tgz",
+          "integrity": "sha512-XDN92U311aINL77ieWHmqCcNlwjoP5cHXDxIxbf2MaPYuCXOHS7gHH8jktxeK5omgd52XbSTX6a4Piwd1pQmzA==",
+          "dev": true,
+          "requires": {
+            "fast-deep-equal": "^2.0.1",
+            "fast-json-stable-stringify": "^2.0.0",
+            "json-schema-traverse": "^0.4.1",
+            "uri-js": "^4.2.2"
+          }
+        },
+        "ansi-regex": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.0.0.tgz",
+          "integrity": "sha512-iB5Dda8t/UqpPI/IjsejXu5jOGDrzn41wJyljwPH65VCIbk6+1BzFIMJGFwTNrYXT1CrD+B4l19U7awiQ8rk7w==",
+          "dev": true
+        },
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
+          "dev": true
+        },
+        "string-width": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.0.0.tgz",
+          "integrity": "sha512-rr8CUxBbvOZDUvc5lNIJ+OC1nPVpz+Siw9VBtUjB9b6jZehZLFt0JMCZzShFHIsI8cbhm0EsNIfWJMFV3cu3Ew==",
+          "dev": true,
+          "requires": {
+            "emoji-regex": "^7.0.1",
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^5.0.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "5.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.0.0.tgz",
+          "integrity": "sha512-Uu7gQyZI7J7gn5qLn1Np3G9vcYGTVqB+lFTytnDJv83dd8T22aGH451P3jueT2/QemInJDfxHB5Tde5OzgG1Ow==",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^4.0.0"
+          }
+        }
+      }
+    },
     "text-table": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/text-table/-/text-table-0.2.0.tgz",
@@ -6468,6 +7322,12 @@
       "integrity": "sha1-WIeWa7WCpFA6QetST301ARgVphM=",
       "dev": true
     },
+    "tslib": {
+      "version": "1.9.3",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.9.3.tgz",
+      "integrity": "sha512-4krF8scpejhaOgqzBEcGM7yDIEfi0/8+8zDRZhNZZ2kjmHJ4hv3zCbQWxoJGz1iw5U0Jl0nma13xzHXcncMavQ==",
+      "dev": true
+    },
     "tty-browserify": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/tty-browserify/-/tty-browserify-0.0.1.tgz",
@@ -6965,6 +7825,15 @@
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
       "dev": true
     },
+    "write": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/write/-/write-1.0.3.tgz",
+      "integrity": "sha512-/lg70HAjtkUgWPVZhZcm+T4hkL8Zbtp1nFNOn3lRrxnlv50SRBv7cR7RqR+GMsd3hUXy9hWBo4CHTbFTcOYwig==",
+      "dev": true,
+      "requires": {
+        "mkdirp": "^0.5.1"
+      }
+    },
     "ws": {
       "version": "3.3.3",
       "resolved": "https://registry.npmjs.org/ws/-/ws-3.3.3.tgz",
diff --git a/package.json b/package.json
index fdee66bf..55ca6ea0 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,7 @@
     "browserify": "^16.2.3",
     "chai": "^4.1.2",
     "del": "^3.0.0",
+    "eslint": "^5.13.0",
     "jshint": "^2.9.6",
     "jshint-stylish": "^2.2.1",
     "karma": "^3.0.0",
@@ -46,4 +47,4 @@
     "url": "https://github.com/dagrejs/dagre-d3.git"
   },
   "license": "MIT"
-}
\ No newline at end of file
+}
diff --git a/test/bundle-test.js b/test/bundle-test.js
index 521f48f9..934ee0fe 100644
--- a/test/bundle-test.js
+++ b/test/bundle-test.js
@@ -5,8 +5,8 @@ d3.select("body").append("link")
   .attr("href", "/base/test/bundle-test.css");
 
 describe("dagreD3", function() {
-  var svg,
-      g;
+  var svg;
+  var g;
 
   beforeEach(function() {
     svg = d3.select("body").append("svg");
diff --git a/test/demo-test.js b/test/demo-test.js
index 1b434b9f..20c89689 100644
--- a/test/demo-test.js
+++ b/test/demo-test.js
@@ -1,11 +1,11 @@
 // A *very* simple test runner to ensure that the demos work as expected.
-var webpage = require("webpage"),
-    system = require("system"),
-    stdout = system.stdout,
-    stderr = system.stderr,
-    // Too bad this replaces the more function fs module from nodejs...
-    fs = require("fs"),
-    start = new Date();
+var webpage = require("webpage");
+var system = require("system");
+var stdout = system.stdout;
+var stderr = system.stderr;
+// Too bad this replaces the more function fs module from nodejs...
+var fs = require("fs");
+var start = new Date();
 
 var red = "\033[31m";
 var green = "\033[32m";