ng-zorro-antd/drawer/style/patch.less

An enterprise-class UI components based on Ant Design and Angular

.@{drawer-prefix-cls} {
  // Fix the issue of the drawer content shadow when the drawer is closed
  &:not(.@{drawer-prefix-cls}-open) {
    .@{drawer-prefix-cls}-content-wrapper {
      box-shadow: none;
    }
  }
}