Sudhakar, Hemanth | Disabling the gray color highlighting on click in iOS devices

When any graph is opened in iOS devices, clicking on a point highlights the whole graph with gray color briefly. This hinders the interactivity as it does it for the whole graph area

src/scss/chart.scss

@@ -1,5 +1,6 @@
 .c3 svg {
   font: 10px sans-serif;
+  -webkit-tap-highlight-color: rgba(0,0,0,0);
 }
 .c3 path, .c3 line {
   fill: none;