node package manager
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Peeper works like an FS watcher, only it doesn't break when inotify isn't available (or is overloaded)

It currently uses polling only with a customizable interval.

You may watch files and directories whether they exist or not., [options], [listener])

Returns an object implementing the FSWatcher interface from node core. Only change events are emitted. This function will not throw an error.

Options are defaulted to {persistent: true, interval: 2003} which says that the process will stay alive as long as the watcher is active, and files will be polled for changes ever 2003ms.

Listener is a callback automatically attached to the watcher change event