util.transferableAbortController()
创建并返回一个 <AbortController> 实例,其 <AbortSignal> 被标记为可转让,可与 structuredClone() 或 postMessage() 一起使用。
¥Creates and returns an <AbortController> instance whose <AbortSignal> is marked
as transferable and can be used with structuredClone() or postMessage().