Apply #1085 to src

c3.js

@@ -1089,8 +1089,8 @@
             // subchart
             subchart_show: false,
             subchart_size_height: 60,
-            subchart_onbrush: function () {},
             subchart_axis_x_show: true,
+            subchart_onbrush: function () {},
             // color
             color_pattern: [],
             color_threshold: {},

src/config.js

@@ -65,6 +65,7 @@ c3_chart_internal_fn.getDefaultConfig = function () {
         // subchart
         subchart_show: false,
         subchart_size_height: 60,
+        subchart_axis_x_show: true,
         subchart_onbrush: function () {},
         // color
         color_pattern: [],

src/subchart.js

@@ -39,7 +39,8 @@ c3_chart_internal_fn.initSubchart = function () {
     $$.axes.subx = context.append("g")
         .attr("class", CLASS.axisX)
         .attr("transform", $$.getTranslate('subx'))
-        .attr("clip-path", config.axis_rotated ? "" : $$.clipPathForXAxis);
+        .attr("clip-path", config.axis_rotated ? "" : $$.clipPathForXAxis)
+        .style("visibility", config.subchart_axis_x_show ? 'visible' : 'hidden');
 };
 c3_chart_internal_fn.updateTargetsForSubchart = function (targets) {
     var $$ = this, context = $$.context, config = $$.config,