Move condition before loop

Minor fix; don't enter inot the foreach loop if not needed
Link to #12

Author: flothoni

src/plugin.js

@@ -188,11 +188,13 @@ const ErrorBarsPlugin = {
 
     // map error bar to barchart bar via label property
     barchartCoords.forEach((dataset, i) => {
+      var hidden = chart.data.datasets[i]._meta[0].hidden
+      if (hidden) { 
+        return; 
+      }
+      
       dataset.forEach((bar) => {
-        var hidden = chart.data.datasets[i]._meta[0].hidden
-        if (hidden) { 
-          return; 
-        }
+        
 
         let cur = errorBarCoords[i];
         if (!cur) {