class UUID { public static uuid ( ) { let d = new Date ( ) . getTime ( ) ; return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx' . replace ( /[xy]/g , function ( c ) { let r = ( d + Math . random ( ) * 16 ) % 16 | 0 ; d = Math . floor ( d / 16 ) ; return ( c == 'x' ? r : ( r & 0x3 | 0x8 ) ) . toString ( 16 ) ; } ) ; } } export default UUID ;