watcher.ref()

• 返回: <fs.StatWatcher>

被调用时，请求 Node.js 事件循环在 <fs.StatWatcher> 处于活动状态时不退出。多次调用 watcher.ref() 不会有任何效果。

【When called, requests that the Node.js event loop not exit so long as the <fs.StatWatcher> is active. Calling watcher.ref() multiple times will have no effect.】

默认情况下，所有 <fs.StatWatcher> 对象都是“引用”的，通常不需要调用 watcher.ref()，除非之前已经调用过 watcher.unref()。

【By default, all <fs.StatWatcher> objects are "ref'ed", making it normally unnecessary to call watcher.ref() unless watcher.unref() had been called previously.】