Move methods around

Author: gaearon

src/HTML5Backend.js

@@ -43,10 +43,19 @@ export default class HTML5Backend {
       throw new Error('Cannot have two HTML5 backends at the same time.');
     }
     this.constructor.isSetUp = true;
-
     this.addEventListeners(window);
   }
 
+  teardown() {
+    if (typeof window === 'undefined') {
+      return;
+    }
+
+    this.constructor.isSetUp = false;
+    this.removeEventListeners(window);
+    this.clearCurrentDragSourceNode();
+  }
+
   addEventListeners(target) {
     target.addEventListener('dragstart', this.handleTopDragStart);
     target.addEventListener('dragstart', this.handleTopDragStartCapture, true);
@@ -60,18 +69,6 @@ export default class HTML5Backend {
     target.addEventListener('drop', this.handleTopDropCapture, true);
   }
 
-  teardown() {
-    if (typeof window === 'undefined') {
-      return;
-    }
-
-    this.constructor.isSetUp = false;
-
-    this.removeEventListeners(window);
-
-    this.clearCurrentDragSourceNode();
-  }
-
   removeEventListeners(target) {
     target.removeEventListener('dragstart', this.handleTopDragStart);
     target.removeEventListener('dragstart', this.handleTopDragStartCapture, true);