From b65ad6d78eb2e492a09866b3b57b3b8912bdb438 Mon Sep 17 00:00:00 2001
From: arnsvel <arnsvel@gmail.com>
Date: Thu, 13 Jun 2019 11:54:30 +0900
Subject: [PATCH] Make sure innerRadius is not NaN value

Error: attribute dx: Expected length, "NaNpx".
Replication:
Happens every time lost focus from/to browser tab when gauge chart is dynamically generated.

Investigation:
w = config.gauge_width is has assigned value 10
$$.innerRadiusRatio is -Infinity
$$.innerRadius is NaN
---
 src/arc.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/arc.js b/src/arc.js
index 5c2df6781..1396554ad 100644
--- a/src/arc.js
+++ b/src/arc.js
@@ -492,7 +492,8 @@ ChartInternal.prototype.redrawArc = function (duration, durationForExit, withTra
         backgroundArc
             .exit()
             .remove();
-
+        
+        $$.innerRadius = $$.innerRadius || 0;
         $$.arcs.select('.' + CLASS.chartArcsGaugeUnit)
             .attr("dy", ".75em")
             .text(config.gauge_label_show ? config.gauge_units : '');