add no legend to layout when legend does not show up

Author: archmoj

src/components/fx/hoverlabel_defaults.js

@@ -7,9 +7,7 @@ var isUnifiedHover = require('./helpers').isUnifiedHover;
 module.exports = function handleHoverLabelDefaults(contIn, contOut, coerce, opts) {
     opts = opts || {};
 
-    var hasLegend =
-        contOut.legend &&
-        contOut.legend.font;
+    var hasLegend = contOut.legend;
 
     function inheritFontAttr(attr) {
         if(!opts.font[attr]) {

src/components/legend/defaults.js

@@ -19,12 +19,11 @@ module.exports = function legendDefaults(layoutIn, layoutOut, fullData) {
     }
 
     var trace;
-
-    function traceCoerce(attr, dflt) {
+    var traceCoerce = function(attr, dflt) {
         var traceIn = trace._input;
         var traceOut = trace;
         return Lib.coerce(traceIn, traceOut, plotsAttrs, attr, dflt);
-    }
+    };
 
     var globalFont = layoutOut.font || {};
     var grouptitlefont = Lib.coerceFont(coerce, 'grouptitlefont', Lib.extendFlat({}, globalFont, {
@@ -83,6 +82,9 @@ module.exports = function legendDefaults(layoutIn, layoutOut, fullData) {
         basePlotLayoutAttributes, 'showlegend',
         legendReallyHasATrace && legendTraceCount > 1);
 
+    // delete legend
+    if(showLegend === false) layoutOut.legend = undefined;
+
     if(showLegend === false && !containerIn.uirevision) return;
 
     coerce('uirevision', layoutOut.uirevision);