Remove specific prefix word from camelCase strings

stripCamelPrefix.js

/**
 * Remove prefix word from camelCase strings.
 *
 * @example stripCamelPrefix('myOldThing'); // oldThing
 *
 * @param {string} str
 * @param {string} prefix
 *
 * @return {string}
 */
function stripCamelPrefix (str, prefix) {
  var words = str.split(/(?=[A-Z])/);
  // Found and more words.
  if (words.length > 0 && words[0] === prefix) {
    // Remove prefix (destructive), adjust new first word.
    words.shift();
    words[0] = words[0].toLowerCase();
    // Create new string.
    return words.join('');
  }
  return false;
}