name export function typeOf ( value ) ; export function typeOf ( value ) ; export function typeOf ( value ) ; export function typeOf ( value ) ; export function typeOf ( value ) ; export function typeOf ( value ) ; export function typeOf ( value ) { if ( value === null ) return 'Null' ; if ( value === void 0 ) return `Undefined` ; return Object . prototype . toString . call ( value ) . slice ( 8 , - 1 ) ; }