Merge pull request #5852 from plotly/fix-hover-data-key

Use ids from axes instead of [object Object] in hover data key

Author: archmoj

draftlogs/5852_fix.md

@@ -0,0 +1 @@
+ - Use ids from axes when making hover data keys [[#5852](https://github.com/plotly/plotly.js/pull/5852)]

src/components/fx/hover.js

@@ -805,7 +805,7 @@ function _hover(gd, evt, subplot, noHoverEvent) {
 }
 
 function hoverDataKey(d) {
-    return [d.trace.index, d.index, d.x0, d.y0, d.name, d.attr, d.xa, d.ya || ''].join(',');
+    return [d.trace.index, d.index, d.x0, d.y0, d.name, d.attr, d.xa ? d.xa._id : '', d.ya ? d.ya._id : ''].join(',');
 }
 
 var EXTRA_STRING_REGEX = /<extra>([\s\S]*)<\/extra>/;