plotly
diff --git a/‎src/components/errorbars/index.js
Lines changed: 2 additions & 2 deletions b/‎src/components/errorbars/index.js
Lines changed: 2 additions & 2 deletions
diff --git a/‎src/plots/cartesian/dragbox.js
Lines changed: 1 addition & 1 deletion b/‎src/plots/cartesian/dragbox.js
Lines changed: 1 addition & 1 deletion
diff --git a/‎src/plots/cartesian/graph_interact.js
Lines changed: 14 additions & 2 deletions b/‎src/plots/cartesian/graph_interact.js
Lines changed: 14 additions & 2 deletions
@@ -46,11 +46,11 @@ errorBars.plot = require('./plot');
 errorBars.style = require('./style');
 
 errorBars.hoverInfo = function(calcPoint, trace, hoverPoint) {
-    if(trace.error_y.visible) {
+    if((trace.error_y || {}).visible) {
         hoverPoint.yerr = calcPoint.yh - calcPoint.y;
         if(!trace.error_y.symmetric) hoverPoint.yerrneg = calcPoint.y - calcPoint.ys;
     }
-    if(trace.error_x.visible) {
+    if((trace.error_x || {}).visible) {
         hoverPoint.xerr = calcPoint.xh - calcPoint.x;
         if(!trace.error_x.symmetric) hoverPoint.xerrneg = calcPoint.x - calcPoint.xs;
     }
 
@@ -155,7 +155,7 @@ module.exports = function dragBox(gd, plotinfo, x, y, w, h, ns, ew) {
         lum = gd._hmpixcount ?
             (gd._hmlumcount / gd._hmpixcount) :
             tinycolor(gd._fullLayout.plot_bgcolor).getLuminance();
-        path0 = path0 = 'M0,0H'+pw+'V'+ph+'H0V0';
+        path0 = 'M0,0H'+pw+'V'+ph+'H0V0';
         dimmed = false;
         zoomMode = 'xy';
 
 
@@ -313,9 +313,15 @@ function hover(gd, evt, subplot) {
                 .map(function(pi) { return pi.id; })),
 
         xaArray = subplots.map(function(spId) {
+            if(spId.substr(0,7) === 'ternary') {
+                return gd._fullLayout[spId]._ternary.xaxis;
+            }
             return Plotly.Axes.getFromId(gd, spId, 'x');
         }),
         yaArray = subplots.map(function(spId) {
+            if(spId.substr(0,7) === 'ternary') {
+                return gd._fullLayout[spId]._ternary.yaxis;
+            }
             return Plotly.Axes.getFromId(gd, spId, 'y');
         }),
         hovermode = evt.hovermode || fullLayout.hovermode;
@@ -366,7 +372,7 @@ function hover(gd, evt, subplot) {
         for(curvenum = 0; curvenum<gd.calcdata.length; curvenum++) {
             cd = gd.calcdata[curvenum];
             trace = cd[0].trace;
-            if(trace.hoverinfo!=='none' && subplots.indexOf(trace.xaxis + trace.yaxis)!==-1) {
+            if(trace.hoverinfo!=='none' && subplots.indexOf(getSubplot(trace))!==-1) {
                 searchData.push(cd);
             }
         }
@@ -431,7 +437,7 @@ function hover(gd, evt, subplot) {
         if(!cd || !cd[0] || !cd[0].trace || cd[0].trace.visible !== true) continue;
 
         trace = cd[0].trace;
-        subploti = subplots.indexOf(trace.xaxis + trace.yaxis);
+        subploti = subplots.indexOf(getSubplot(trace));
 
         // within one trace mode can sometimes be overridden
         mode = hovermode;
@@ -575,6 +581,12 @@ function hover(gd, evt, subplot) {
     });
 }
 
+// look for either .subplot (currently just ternary)
+// or xaxis and yaxis attributes
+function getSubplot(trace) {
+    return trace.subplot || (trace.xaxis + trace.yaxis);
+}
+
 fx.getDistanceFunction = function(mode, dx, dy, dxy) {
     if(mode==='closest') return dxy || quadrature(dx, dy);
     return mode==='x' ? dx : dy;
Original file line number	Diff line number	Diff line change
`@@ -46,11 +46,11 @@ errorBars.plot = require('./plot');`
`46`	`46`	`errorBars.style = require('./style');`
`47`	`47`
`48`	`48`	`errorBars.hoverInfo = function(calcPoint, trace, hoverPoint) {`
`49`		`- if(trace.error_y.visible) {`
	`49`	`+ if((trace.error_y \|\| {}).visible) {`
`50`	`50`	`hoverPoint.yerr = calcPoint.yh - calcPoint.y;`
`51`	`51`	`if(!trace.error_y.symmetric) hoverPoint.yerrneg = calcPoint.y - calcPoint.ys;`
`52`	`52`	`}`
`53`		`- if(trace.error_x.visible) {`
	`53`	`+ if((trace.error_x \|\| {}).visible) {`
`54`	`54`	`hoverPoint.xerr = calcPoint.xh - calcPoint.x;`
`55`	`55`	`if(!trace.error_x.symmetric) hoverPoint.xerrneg = calcPoint.x - calcPoint.xs;`
`56`	`56`	`}`