You still have to simulate named arguments with an object: const foo = ({ a = 2, b = 2, c = 3 } = {}) => a * b * c; const dict = {b: 4, c: 6}; foo

You still have to simulate named arguments with an object: const foo = ({ a = 2, b = 2, c = 3 } = {}) => a * b * c; const dict = {b: 4, c: 6}; foo(); // 12 foo(dict); // 48