Function stringify

packages/fresh/src/jsonify/stringify.ts:46–54

(data: unknown, custom?: Stringifiers)

 * serialized only once.
 */
export function stringify(data: unknown, custom?: Stringifiers): string {
  const out: string[] = [];
  const indexes = new Map<unknown, number>();
  const res = serializeInner(out, indexes, data, custom);
  if (res < 0) {
    return String(res);
  }
  return `[${out.join(",")}]`;
}

function serializeInner(
  out: string[],