MAGETWO-99535: Frontend email login on Safari cursor issue

Author: Roman Lytvynenko

lib/web/mage/trim-input.js

@@ -41,9 +41,18 @@ define([
          * @private
          */
         _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 input = this._getInputValue().trim();
 
             this.options.cache.input.val(input);
+
+            // Safari caret position workaround: setting caret position to previously stored values
+            if (caretStart !== null && caretEnd !== null) {
+                this.options.cache.input.get(0).setSelectionRange(caretStart, caretEnd);
+            }
         },
 
         /**