@delon/theme/setting-drawer/style/rtl.less

ng-alain theme system library.

@{setting-drawer-prefix}-rtl {
  direction: rtl;
  @{setting-drawer-prefix} {
    &__handle {
      right: inherit;
      left: 0;
      border-radius: 0 4px 4px 0;

      &-opened {
        right: inherit;
        left: @setting-drawer-width;
      }
    }
  }
}