function formatDate ( date ) { let d = new Date ( date ) , month = "" + ( d . getMonth ( ) + 1 ) , day = "" + d . getDate ( ) , year = d . getFullYear ( ) ; if ( month . length < 2 ) month = "0" + month ; if ( day . length < 2 ) day = "0" + day ; return [ year , month , day ] . join ( "-" ) ; } export { formatDate } ;