@redocly/theme/src/core/utils/dom.ts

Shared UI components lib

export const IS_BROWSER = typeof window !== 'undefined' && 'HTMLElement' in window;

export function onDocumentReady(fn: () => unknown) {
  if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', fn as EventListener);
  } else {
    fn();
  }
}