const S4 = ( ) => { return ( ( ( 1 + Math . random ( ) ) * 0x10000 ) | 0 ) . toString ( 16 ) . substring ( 1 ) ; } ; const guid = ( ) => { return ( S4 ( ) + S4 ( ) + '-' + S4 ( ) + '-' + S4 ( ) + '-' + S4 ( ) + '-' + S4 ( ) + S4 ( ) + S4 ( ) ) ; } ; export default guid ;