Move style for legend background to css - #326

c3.css

@@ -132,6 +132,13 @@
   font-size: 12px;
 }
 
+.c3-legend-background {
+  opacity: 0.75;
+  fill: white;
+  stroke: lightgray;
+  stroke-width: 1
+}
+
 /*-- Tooltip --*/
 
 .c3-tooltip {

c3.js

@@ -4698,11 +4698,8 @@
             // Set background for inset legend
             if (isLegendInset && maxWidth !== 0) {
                 legend.insert('g', '.' + CLASS.legendItem)
-                .attr("class", CLASS.legendBackground).append('rect')
+                    .attr("class", CLASS.legendBackground)
-                .style('opacity', 0.75)
+                  .append('rect')
-                .style('fill', 'white')
-                .style('stroke', 'lightgray')
-                .style('stroke-width', 1)
                     .attr('height', getLegendHeight() - 10)
                     .attr('width', maxWidth * (step + 1) + 10);
             }