removeBaseUrl.js

export const removeBaseUrl = (url) => {
  /*
   * Replace base URL in given string, if it exists, and return the result.
   *
   * e.g. "http://localhost:8000/api/v1/blah/" becomes "/api/v1/blah/"
   *      "/api/v1/blah/" stays "/api/v1/blah/"
   */
  const baseUrlPattern = /^https?:\/\/[a-z\:0-9.]+/;
  let result = "";

  let match = baseUrlPattern.exec(url);
  if (match != null) {
      result = match[0];
  }

  if (result.length > 0) {
      url = url.replace(result, "");
  }

  return url;
}