Remove ending substring from a string

removeEndingSubString.js

/**
 * `removeEndingSubString` removes a substring from the end of a string.
 * 
 * It will only remove the exact substring. So if the string doesn't end
 * with the substring, nothing happens and the original string is returned
 * as is.
 * 
 * @link https://kadimi.com/ | https://gist.github.com/kadimi/32bb8f4cc56224343992806fd0898322
 * @author Nabil Kadimi
 * 
 * @param {string} original The origin string.
 * @param {string} substringToRemove the string to remove.
 * @returns The new string.
 */
function removeEndingSubString(original, substringToRemove) {
  if (original.slice(0 - substringToRemove.length) === substringToRemove) {
    return original.substring(0, original.length - substringToRemove.length);
  }
  return original;
}