Function stripTrailingSlash

packages/common/src/location/util.ts:40–48

(url: string)

 * @returns The URL string, modified if needed.
 */
export function stripTrailingSlash(url: string): string {
  // Find the index of the first occurrence of `#`, `?`, or the end of the string.
  // This marks the start of the query string, fragment, or the end of the URL path.
  const pathEndIdx = url.search(/#|\?|$/);
  // Check if the character before `pathEndIdx` is a trailing slash.
  // If it is, remove the trailing slash and return the modified URL.
  // Otherwise, return the URL as is.
  return url[pathEndIdx - 1] === '/' ? url.slice(0, pathEndIdx - 1) + url.slice(pathEndIdx) : url;
}

/**
 * Normalizes URL parameters by prepending with `?` if needed.