tweak typescript integration (#30)

src/dagre/position/bk.ts

@@ -46,7 +46,7 @@ function findType1Conflicts(g, layering) {
       k0 = 0,
       // Tracks the last node in this layer scanned for crossings with a type-1
       // segment.
-      scanPos = 0 as number | string,
+      scanPos: number | string = 0,
       prevLayerLength = prevLayer.length,
       lastNode = _.last(layer);
 

src/graphlib/graph.ts

@@ -24,23 +24,30 @@ var EDGE_KEY_DELIM = '\x01';
 //    edges up and, object properties, which have string keys, are the closest
 //    we're going to get to a performant hashtable in JavaScript.
 export class Graph {
-  _isDirected: boolean;
-  _isMultigraph: boolean;
-  _isCompound: boolean;
-  _label: any;
-  _defaultNodeLabelFn: () => any;
-  _defaultEdgeLabelFn: () => any;
-  _nodes: {};
-  _parent: {};
-  _children: {};
-  _in: {};
-  _preds: {};
-  _out: {};
-  _sucs: {};
-  _edgeObjs: {};
-  _edgeLabels: {};
-  _nodeCount = 0;
-  _edgeCount = 0;
+  protected _isDirected: boolean;
+  protected _isMultigraph: boolean;
+  protected _isCompound: boolean;
+  protected _label: any;
+  protected _defaultNodeLabelFn: () => any;
+  protected _defaultEdgeLabelFn: () => any;
+  protected _nodes: {};
+  protected _parent: {};
+  protected _children: {};
+  protected _in: {};
+  protected _preds: {};
+  protected _out: {};
+  protected _sucs: {};
+  protected _edgeObjs: {};
+  protected _edgeLabels: {};
+  /**
+   * Number of nodes in the graph. Should only be changed by the implementation. 
+   */
+  protected _nodeCount = 0;
+  /**
+   * Number of edges in the graph. Should only be changed by the implementation. 
+   */
+  protected _edgeCount = 0;
+
   constructor(opts = {} as { directed?: boolean, multigraph?: boolean, compound?: boolean }) {
     this._isDirected = _.has(opts, 'directed') ? opts.directed : true;
     this._isMultigraph = _.has(opts, 'multigraph') ? opts.multigraph : false;
@@ -475,12 +482,6 @@ export class Graph {
   }
 }
 
-/* Number of nodes in the graph. Should only be changed by the implementation. */
-Graph.prototype._nodeCount = 0;
-
-/* Number of edges in the graph. Should only be changed by the implementation. */
-Graph.prototype._edgeCount = 0;
-
 function incrementOrInitEntry(map, k) {
   if (map[k]) {
     map[k]++;

tsconfig.json

@@ -3,6 +3,7 @@
     "target": "ES6",
     "outDir": "dist_tmp/",
     "types": [],
+    "module": "node16",
   },
   "exclude": [
     "src/**/*.test.ts",