factor out util

monfera · monfera · commit e3a117c06ff8 · 2017-09-12T11:01:50.000+02:00
(cherry picked from commit 07e2856)
diff --git a/src/lib/index.js b/src/lib/index.js
@@ -143,6 +143,13 @@ lib.pauseEvent = function(e) {
     return false;
 };
 
+/**
+ * SVG painter's algo worked around with reinsertion
+ */
+lib.raiseToTop = function raiseToTop(elem) {
+    elem.parentNode.appendChild(elem);
+};
+
 // constrain - restrict a number v to be between v0 and v1
 lib.constrain = function(v, v0, v1) {
     if(v0 > v1) return Math.max(v1, Math.min(v0, v));
diff --git a/src/traces/sankey/render.js b/src/traces/sankey/render.js
@@ -325,7 +325,7 @@ function attachDragHandler(sankeyNode, sankeyLink, callbacks) {
 
         .on('dragstart', function(d) {
             if(d.arrangement === 'fixed') return;
-            this.parentNode.appendChild(this); // bring element to top (painter's algo)
+            Lib.raiseToTop(this);
             d.interactionState.dragInProgress = d.node;
             saveCurrentDragPosition(d.node);
             if(d.interactionState.hovered) {
