openstamanager/resources/ts/WebComponents/TopAppBar.ts

import {TopAppBar as MWCTopAppBar} from '@material/mwc-top-app-bar';
import {css} from 'lit';
import {customElement} from 'lit/decorators.js';

declare global {
  interface HTMLElementTagNameMap {
    'top-app-bar': TopAppBar;
  }
}

@customElement('top-app-bar')
export default class TopAppBar extends MWCTopAppBar {
  static styles = [...MWCTopAppBar.styles, css`
    header.mdc-top-app-bar {
      z-index: 0;
    }
  `];
}