Added freeze URL parameter to disable animations

src/chart.tsx

@@ -133,6 +133,7 @@ export interface ChartProps {
   selection: IndiInfo;
   chartType: ChartType;
   onSelection: (indiInfo: IndiInfo) => void;
+  freezeAnimation?: boolean;
 }
 
 /** Component showing the genealogy chart and handling transition animations. */
@@ -191,6 +192,11 @@ export class Chart extends React.PureComponent<ChartProps, {}> {
       return;
     }
 
+    // Freeze changing selection after initial rendering.
+    if (!args.initialRender && this.props.freezeAnimation) {
+      return;
+    }
+
     if (args.initialRender) {
       (d3.select('#chart').node() as HTMLElement).innerHTML = '';
       this.chart = createChart({