import React from 'react' ; interface Props { count : number ; pageNumber : number ; pageSize : number ; onSelect : onSelect ; } type onSelect = ( s : number ) => void ; export default function ( { count = 0 , pageSize = 0 , pageNumber = 0 , onSelect } ) { let pageNumberTotal = Math . ceil ( count / pageSize ) ; if ( ! count || pageNumberTotal == 1 ) return null ; let previous = pageNumber > 1 ? pageNumber - 1 : 0 ; let Next = pageNumber + 1 <= pageNumberTotal ? pageNumber + 1 : 0 ; return ( < nav aria - label = "Page navigation" className = "mt-3" > < ul className = "pagination justify-content-center mb-3" > < li className = { `page-item ${ previous ? '' : 'disabled' }` } > < div className = "page-link" aria - label = "Previous" onClick = { ( ) => { onSelect ( previous ) ; } } > < span aria - hidden = "true" > & laquo ; < /span> < span className = "sr-only" > Previous < /span> < /div> < /li> { ( ( ) => { let arr = [ ] ; let min = pageNumber - 5 >= 1 ? pageNumber - 5 : 0 , max = pageNumber + 4 >= pageNumberTotal ? pageNumberTotal : pageNumber + 4 ; for ( let i = min ; i < max ; i ++ ) { arr . push ( < li className = { `page-item ${ pageNumber - 1 == i ? 'active' : '' }` } key = { i } > < div className = "page-link" onClick = { ( ) => { onSelect ( i + 1 ) ; } } > { i + 1 } < /div> < /li>); } return arr ; } ) ( ) } < li className = { `page-item ${ Next ? '' : 'disabled' }` } > < div className = "page-link" aria - label = "Next" onClick = { ( ) => { onSelect ( Next ) ; } } > < span aria - hidden = "true" > & raquo ; < /span> < span className = "sr-only" > Next < /span> < /div> < /li> < /ul> < /nav>); }