MAGETWO-99535: Frontend email login on Safari cursor issue

Author: Roman Lytvynenko

lib/web/mage/trim-input.js

@@ -42,10 +42,12 @@ define([
          */
         _trimInput: function () {
             // Safari caret position workaround: storing carter position
-            const caretStart = this.options.cache.input.get(0).selectionStart;
-            const caretEnd = this.options.cache.input.get(0).selectionEnd;
+            var caretStart, caretEnd, input;
 
-            var input = this._getInputValue().trim();
+            caretStart = this.options.cache.input.get(0).selectionStart;
+            caretEnd = this.options.cache.input.get(0).selectionEnd;
+
+            input = this._getInputValue().trim();
 
             this.options.cache.input.val(input);