astro/docs/src/util.ts

export function getLanguageFromURL(pathname: string) {
  const langCodeMatch = pathname.match(/\/([a-z]{2}-?[A-Z]{0,2})\//);
  return langCodeMatch ? langCodeMatch[1] : 'en';
}

/** Remove \ and / from beginning of string */
export function removeLeadingSlash(path: string) {
  return path.replace(/^[/\\]+/, '');
}

/** Remove \ and / from end of string */
export function removeTrailingSlash(path: string) {
  return path.replace(/[/\\]+$/, '');
}