import { getTabbableNodes } from './utils/DOMutils' ; const getRelativeFocusable = ( element , scope ) => { if ( ! element || ! scope || ! scope . contains ( element ) ) { return { } ; } const focusables = getTabbableNodes ( [ scope as HTMLElement ] , new Map ( ) ) ; const current = focusables . findIndex ( ( { node } ) => node === element ) ; if ( current === - 1 ) { return { } ; } return { prev : focusables [ current - 1 ] , next : focusables [ current + 1 ] , first : focusables [ 0 ] , last : focusables [ focusables . length - 1 ] , } ; } ; interface FocusNextOptions { default scope ? : HTMLElement | HTMLDocument ; default cycle ? : boolean ; /**
     * options for focus action to control it more precisely (ie. `{ preventScroll: true }`)
     */ focusOptions ? : FocusOptions ; } const defaultOptions = ( options ) => Object . assign ( { scope : document . body , cycle : true , } , options ) ; param baseElement param { FocusNextOptions } options export const focusNextElement = ( baseElement , options = { } ) => { const { scope , cycle } = defaultOptions ( options ) ; const { next , first } = getRelativeFocusable ( baseElement as HTMLInputElement , scope ) ; const newTarget = next || ( cycle && first ) ; if ( newTarget ) { newTarget . node . focus ( options . focusOptions ) ; } } ; param baseElement param { FocusNextOptions } options export const focusPrevElement = ( baseElement , options = { } ) => { const { scope , cycle } = defaultOptions ( options ) ; const { prev , last } = getRelativeFocusable ( baseElement as HTMLInputElement , scope ) ; const newTarget = prev || ( cycle && last ) ; if ( newTarget ) { newTarget . node . focus ( options . focusOptions ) ; } } ;