one more update

Author: kseamon

src/material/datepicker/date-range-input-parts.ts

@@ -304,9 +304,9 @@ export class MatStartDate<D> extends _MatDateRangeInputBase<D> implements CanUpd
       event.preventDefault();
       endInput._elementRef.nativeElement.setSelectionRange(0, 0);
       endInput.focus();
+    } else {
+      super._onKeydown(event);
     }
-
-    super._onKeydown(event);
   }
 }
 
@@ -402,10 +402,9 @@ export class MatEndDate<D> extends _MatDateRangeInputBase<D> implements CanUpdat
     if (event.keyCode === BACKSPACE && !element.value) {
       startInput.focus();
     }
-
     // If the user hits LEFT (LTR) when at the start of the input (and no
     // selection), move the cursor to the end of the start input.
-    if (
+    else if (
       ((event.keyCode === LEFT_ARROW && isLtr) || (event.keyCode === RIGHT_ARROW && !isLtr)) &&
       element.selectionStart === 0 &&
       element.selectionEnd === 0
@@ -414,8 +413,8 @@ export class MatEndDate<D> extends _MatDateRangeInputBase<D> implements CanUpdat
       const endPosition = startInput._elementRef.nativeElement.value.length;
       startInput._elementRef.nativeElement.setSelectionRange(endPosition, endPosition);
       startInput.focus();
+    } else {
+      super._onKeydown(event);
     }
-
-    super._onKeydown(event);
   }
 }