Docs: Improve BackHandler documentation (addEventListener and removeEventListener)
Summary: This commit adds documentation to two methods of BackHandler API, addEventListener and removeEventListener. Despite being a simple change, it helps to keep the documentation consistent. I have tested the `./website` locally, the changes look similar to some other components such as `NetInfo`. [DOCS][ENHANCEMENT][BackHandler] - Improve BackHandler documentation (addEventListener and removeEventListener) Closes https://github.com/facebook/react-native/pull/16618 Differential Revision: D6260935 Pulled By: hramos fbshipit-source-id: ab04a9fca89ddaa1925844b5754caf1c355a9329
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@ -74,6 +74,12 @@ var BackHandler = {
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DeviceEventManager.invokeDefaultBackPressHandler();
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},
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/**
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* Adds an event handler. Supported events:
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*
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* - `hardwareBackPress`: Fires when the Android hardware back button is pressed or when the
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* tvOS menu button is pressed.
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*/
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addEventListener: function (
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eventName: BackPressEventName,
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handler: Function
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@ -84,6 +90,9 @@ var BackHandler = {
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};
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},
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/**
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* Removes the event handler.
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*/
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removeEventListener: function(
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eventName: BackPressEventName,
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handler: Function
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