From 42d493c03ea4d9053a1442b3595fcfc203848b96 Mon Sep 17 00:00:00 2001
From: Xuefeng Zhu <xzhu15@illinois.edu>
Date: Thu, 14 Sep 2017 15:01:11 -0500
Subject: [PATCH] make the target hidden completely

---
 src/api.show.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/api.show.js b/src/api.show.js
index 5a34031..c434f9c 100644
--- a/src/api.show.js
+++ b/src/api.show.js
@@ -10,6 +10,7 @@ c3_chart_fn.show = function (targetIds, options) {
     targets = $$.svg.selectAll($$.selectorTargets(targetIds));
 
     targets.transition()
+        .style('display', 'initial', 'important')
         .style('opacity', 1, 'important')
         .call($$.endall, function () {
             targets.style('opacity', null).style('opacity', 1);
@@ -35,6 +36,7 @@ c3_chart_fn.hide = function (targetIds, options) {
         .style('opacity', 0, 'important')
         .call($$.endall, function () {
             targets.style('opacity', null).style('opacity', 0);
+            targets.style('display', 'none');
         });
 
     if (options.withLegend) {