remove existing event listeners

Author: jonfunkhouser

src/components/dragelement/index.js

@@ -85,6 +85,23 @@ dragElement.init = function init(options) {
         initialTarget,
         rightClick;
 
+    if(options.dragmode === false) {
+        if(element.onmousedown) {
+            element.onmousedown = undefined;
+        }
+        if(!supportsPassive) {
+            if(element.ontouchstart) {
+                element.ontouchstart = undefined;
+            }
+        } else {
+            if(element._ontouchstart) {
+                element.removeEventListener('touchstart', element._ontouchstart);
+                element._ontouchstart = undefined;
+            }
+        }
+        return;
+    }
+
     if(!gd._mouseDownTime) gd._mouseDownTime = 0;
 
     element.style.pointerEvents = 'all';