import { createContext, useContext, ReactNode, useState } from 'react'; import { TabType } from 'calypso/performance-profiler/components/header'; interface DeviceTabContextType { activeTab: TabType; setActiveTab: ( tab: TabType ) => void; } const DeviceTabContext = createContext< DeviceTabContextType >( { activeTab: 'mobile', setActiveTab: () => undefined, } ); export function DeviceTabProvider( { initialTab = 'mobile', children, }: { initialTab?: TabType; children: ReactNode; } ) { const [ activeTab, setActiveTab ] = useState< TabType >( initialTab ); return ( { children } ); } export function useDeviceTab() { const context = useContext( DeviceTabContext ); if ( ! context ) { throw new Error( 'useDeviceTab must be used within a DeviceTabProvider' ); } return context; }