Call method taking unit type as parameter from JavaScript

Question

I have a Truffle instance of the contract and I call the method like this

contract_instance.method();

This gives me this error message:

method Received 0 arguments while expecting on of the follow signatures ([["unit"]])

How do I express the Unit value in JS?

Answer 1

You express the Unit in JavaScript by calling the method like this

contract_instance.method([["unit"]]);