属性 aborted 不再是时间戳数字。
aborted
新增于: v0.11.14
如果请求已中止，则 request.aborted 属性将为 true。
request.aborted
true
The aborted property is no longer a timestamp number.
Added in: v0.11.14
The request.aborted property will be true if the request has been aborted.