;
      } else {
        return localAlternateSentinel;
      }
    }
    const toggleGiscusIfUsed = (isAlternate, darkModeDefault) => {
      const baseTheme = document.querySelector('#giscus-base-theme')?.value ?? 'light';
      const alternateTheme = document.querySelector('#giscus-alt-theme')?.value ?? 'dark';
      let newTheme = '';
      if(authorPrefersDark) {
        newTheme = isAlternate ? baseTheme : alternateTheme;
      } else {
        newTheme = isAlternate ? alternateTheme : baseTheme;
    