@atlaskit/app-provider/dist/es2019/theme-provider/utils/is-theme-mounted.js

A top level provider for the Design System.

import { getDocument } from '@atlaskit/browser-apis';
import { THEME_DATA_ATTRIBUTE } from '@atlaskit/tokens/constants';
/**
 * Checks if a theme is mounted in the document head.
 *
 * Eventually this won't be necessary as we'll utilise AppProvider context
 * to track theme loading.
 */
export function isThemeMounted(themeId) {
  const doc = getDocument();
  if (!doc) {
    return false;
  }
  return doc.head.querySelector(`style[${THEME_DATA_ATTRIBUTE}="${themeId}"]`);
}