react-native/Libraries/Utilities/Platform.ios.js
Christoph Nakazawa deb2a94568 Add Flow types for Platform.select [5/5]
Summary: This change adds type information for `Platform.select` to make sure things are properly typed. This is the last diff in a stack that actually enables the newly fixed/added annotations and it will only land once all the type errors (320+) are fixed.

Reviewed By: sahrens

Differential Revision: D13318805

fbshipit-source-id: af0475d1a2f1e5ace4d513be48827e3659bd7f62
2018-12-06 02:54:19 -08:00

52 lines
1.2 KiB
JavaScript

/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @format
* @flow
*/
'use strict';
const NativeModules = require('NativeModules');
export type PlatformSelectSpec<D, I> = {
default?: D,
ios?: I,
};
const Platform = {
OS: 'ios',
get Version() {
const constants = NativeModules.PlatformConstants;
return constants && constants.osVersion;
},
get isPad() {
const constants = NativeModules.PlatformConstants;
return constants ? constants.interfaceIdiom === 'pad' : false;
},
/**
* Deprecated, use `isTV` instead.
*/
get isTVOS() {
return Platform.isTV;
},
get isTV() {
const constants = NativeModules.PlatformConstants;
return constants ? constants.interfaceIdiom === 'tv' : false;
},
get isTesting(): boolean {
if (__DEV__) {
const constants = NativeModules.PlatformConstants;
return constants && constants.isTesting;
}
return false;
},
select: <D, I>(spec: PlatformSelectSpec<D, I>): D | I =>
'ios' in spec ? spec.ios : spec.default,
};
module.exports = Platform;