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docs: add return type for subscribeNotification (#15490)

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Samuel Attard 2018-11-01 01:24:50 +11:00 • committed by John Kleinschmidt
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docs/api/system-preferences.md
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@ -90,6 +90,8 @@ that contains the user information dictionary sent along with the notification.
* `event` String * `event` String
* `userInfo` Object * `userInfo` Object
Returns `Number` - The ID of this subscription
Subscribes to native notifications of macOS, `callback` will be called with Subscribes to native notifications of macOS, `callback` will be called with
`callback(event, userInfo)` when the corresponding `event` happens. The `callback(event, userInfo)` when the corresponding `event` happens. The
`userInfo` is an Object that contains the user information dictionary sent `userInfo` is an Object that contains the user information dictionary sent
@ -113,6 +115,8 @@ example values of `event` are:
* `event` String * `event` String
* `userInfo` Object * `userInfo` Object
Returns `Number` - The ID of this subscription
Same as `subscribeNotification`, but uses `NSNotificationCenter` for local defaults. Same as `subscribeNotification`, but uses `NSNotificationCenter` for local defaults.
This is necessary for events such as `NSUserDefaultsDidChangeNotification`. This is necessary for events such as `NSUserDefaultsDidChangeNotification`.