Mute event listener logging

Author: dy

src/components/dragelement/index.js

@@ -97,7 +97,12 @@ dragElement.init = function init(options) {
     element.style.pointerEvents = 'all';
 
     element.onmousedown = onStart;
-    element.ontouchstart = onStart;
+
+    if(element._ontouchstart) {
+        element.removeEventListener('touchstart', element._ontouchstart);
+    }
+    element._ontouchstart = onStart;
+    element.addEventListener('touchstart', onStart, {passive: false});
 
     function onStart(e) {
         // make dragging and dragged into properties of gd

src/plots/cartesian/dragbox.js

@@ -434,9 +434,14 @@ module.exports = function dragBox(gd, plotinfo, x, y, w, h, ns, ew) {
 
     // everything but the corners gets wheel zoom
     if(ns.length * ew.length !== 1) {
-        // still seems to be some confusion about onwheel vs onmousewheel...
-        if(dragger.onwheel !== undefined) dragger.onwheel = zoomWheel;
-        else if(dragger.onmousewheel !== undefined) dragger.onmousewheel = zoomWheel;
+        var wheelEventName = dragger.onwheel !== undefined ? 'wheel' : 'mousewheel';
+
+        if(dragger._onwheel) {
+            dragger.removeEventListener(wheelEventName, dragger._onwheel);
+        }
+        dragger._onwheel = zoomWheel;
+
+        dragger.addEventListener(wheelEventName, zoomWheel, {passive: false});
     }
 
     // plotDrag: move the plot in response to a drag