Merge pull request #622 from plotly/hot-fix-colors

Colorscale bug fix

Author: VeraZab

src/components/fields/MarkerColor.js

@@ -106,14 +106,19 @@ class UnconnectedMarkerColor extends Component {
     let adjustedColors = colors;
 
     if (colorscaleType !== 'categorical') {
-      adjustedColors = adjustColorscale(colors, numberOfTraces);
+      adjustedColors = adjustColorscale(colors, numberOfTraces, colorscaleType);
     }
 
     if (
       adjustedColors.every(c => c === adjustedColors[0]) ||
       colorscaleType === 'categorical'
     ) {
-      adjustedColors = adjustColorscale(colors, numberOfTraces, {repeat: true});
+      adjustedColors = adjustColorscale(
+        colors,
+        numberOfTraces,
+        colorscaleType,
+        {repeat: true}
+      );
     }
 
     const updates = adjustedColors.map(color => ({

src/lib/index.js

@@ -182,7 +182,11 @@ function adjustColorscale(
   colorscaleType,
   config
 ) {
-  if (config.repeat) {
+  if (config && config.repeat) {
+    if (numberOfNeededColors < colorscale.length) {
+      return colorscale.slice(0, numberOfNeededColors);
+    }
+
     const repetitions = Math.ceil(numberOfNeededColors / colorscale.length);
     const newArray = new Array(repetitions).fill(colorscale);
     return newArray