/**
 * Turn a string into a kebab-case string
 * @param inval
 *
 * @example
 *    U.kebabCase('test string') // => 'test-string'
 *    U.kebabCase('testString') // => 'test-string'
 *    U.kebabCase('test_string') // => 'test-string'
 */
export function kebabCase(inval: string | null): string {

  const tempString = (inval) ? inval : '';

  const workArray = tempString.match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g);

  let workString: string = '';

  if (workArray && workArray.length > 0) {
    workString = workArray!.join('-').toLowerCase();
  }

  return workString;
}