timeout.ref()
调用时,请求只要 Timeout
处于活动状态,Node.js 事件循环就不会退出。多次调用 timeout.ref()
将不起作用。
¥When called, requests that the Node.js event loop not exit so long as the
Timeout
is active. Calling timeout.ref()
multiple times will have no effect.
默认情况下,所有 Timeout
对象都是 "引用的",因此通常无需调用 timeout.ref()
,除非之前已调用 timeout.unref()
。
¥By default, all Timeout
objects are "ref'ed", making it normally unnecessary
to call timeout.ref()
unless timeout.unref()
had been called previously.