/**
 * Test whether a value is considered empty for selector normalization.
 *
 * @param value - Value to inspect
 * @returns `true` if the value is null, undefined, an empty string, or an empty array
 */
export function isEmpty(value: unknown): boolean {
  if (value === null || value === undefined) {
    return true;
  }
  if (typeof value === 'string') {
    return value.length === 0;
  }
  if (Array.isArray(value)) {
    return value.length === 0;
  }
  return false;
}