const s4 = ( ) => Math . floor ( ( 1 + Math . random ( ) ) * 0x10000 ) . toString ( 16 ) . substring ( 1 ) ; export const uuid = ( ) => s4 ( ) + s4 ( ) + s4 ( ) + s4 ( ) + s4 ( ) + s4 ( ) + s4 ( ) + s4 ( ) ;