import just that is needed

Author: sgratzl

src/plugin/hierarchical.js

@@ -1,12 +1,12 @@
 'use strict';
 
-import * as Chart from 'chart.js';
+import {helpers, defaults, pluginService} from 'chart.js';
 import {toNodes, countExpanded, resolve, parentsOf, preOrderTraversal, lastOfLevel, spanLogic} from '../utils';
 
 
 function parseFontOptions(options) {
-  const valueOrDefault = Chart.helpers.valueOrDefault;
-  const globalDefaults = Chart.defaults.global;
+  const valueOrDefault = helpers.valueOrDefault;
+  const globalDefaults = defaults.global;
   const size = valueOrDefault(options.fontSize, globalDefaults.defaultFontSize);
   const style = valueOrDefault(options.fontStyle, globalDefaults.defaultFontStyle);
   const family = valueOrDefault(options.fontFamily, globalDefaults.defaultFontFamily);
@@ -15,7 +15,7 @@ function parseFontOptions(options) {
     size: size,
     style: style,
     family: family,
-    font: Chart.helpers.fontString(size, style, family)
+    font: helpers.fontString(size, style, family)
   };
 }
 
@@ -156,7 +156,7 @@ const HierarchicalPlugin = {
     const renderLabel = scale.options.hierarchyLabelPosition;
 
     const scaleLabel = scale.options.scaleLabel;
-    const scaleLabelFontColor = Chart.helpers.valueOrDefault(scaleLabel.fontColor, Chart.defaults.global.defaultFontColor);
+    const scaleLabelFontColor = helpers.valueOrDefault(scaleLabel.fontColor, defaults.global.defaultFontColor);
     const scaleLabelFont = parseFontOptions(scaleLabel);
 
     ctx.save();
@@ -488,6 +488,6 @@ const HierarchicalPlugin = {
   }
 };
 
-Chart.pluginService.register(HierarchicalPlugin);
+pluginService.register(HierarchicalPlugin);
 
 export default HierarchicalPlugin;

src/scale/hierarchical.js

@@ -1,9 +1,9 @@
 'use strict';
 
-import * as Chart from 'chart.js';
+import {scaleService, Scale} from 'chart.js';
 import {parentsOf} from '../utils';
 
-const defaultConfig = Object.assign({}, Chart.scaleService.getScaleDefaults('category'), {
+const defaultConfig = Object.assign({}, scaleService.getScaleDefaults('category'), {
   /**
    * reduce the space between items at level X by this factor
    */
@@ -50,7 +50,7 @@ const defaultConfig = Object.assign({}, Chart.scaleService.getScaleDefaults('cat
 });
 
 
-const HierarchicalScale = Chart.Scale.extend({
+const HierarchicalScale = Scale.extend({
   determineDataLimits() {
     const data = this.chart.data;
     const labels = this.options.labels || (this.isHorizontal() ? data.xLabels : data.yLabels) || data.labels;
@@ -186,6 +186,6 @@ const HierarchicalScale = Chart.Scale.extend({
   }
 });
 
-Chart.scaleService.registerScaleType('hierarchical', HierarchicalScale, defaultConfig);
+scaleService.registerScaleType('hierarchical', HierarchicalScale, defaultConfig);
 
 export default HierarchicalScale;

src/utils.js

@@ -69,6 +69,10 @@ export function parentsOf(node, flat) {
 }
 
 
+/**
+ * computes the right most grand child of expanded nodes
+ * @param {ILabelNode} node
+ */
 function rightMost(node) {
   if (!node.expand || node.children.length === 0) {
     return node;