Pull request #3290: KERNEL-13947 refactor: Drawer的bug

Merge in VISUAL/fineui from ~ZHENFEI.LI/fineui:es6 to es6

* commit '0af2b5afdbcb60b320f03c398a2b6105a2108818':
  KERNEL-13947 refactor: Drawer的bug

src/core/controller/controller.drawer.js

@@ -106,9 +106,7 @@ export default class DrawerController extends Controller {
             }]
         });
         this.floatManager[name] = popover;
-        (function (key) {
-            popover.on(BI.Drawer.EVENT_CLOSE, () => this.close(key));
-        })(name);
+        popover.on(BI.Drawer.EVENT_CLOSE, () => this.close(name));
         BI.createWidget({
             type: "bi.absolute",
             element: options.container || this.options.render,