Is it possible to use => to define objects?

Question

I'm trying to use the arrow-constructor to create an object:

var Countable = (data) => {
    return data;
}

But when creating an object:

new Countable(newSubscriptions)

I get the error

Uncaught TypeError: (data) => {
    return data;
} is not a constructor

I get the expected output by doing

var Countable = function(data) {
    return data;
}

I don't think this is possible. – Dave Newton Sep 19 '15 at 17:05 — Dave Newton, Sep 19 '15 at 17:05

score 1 · Answer 1 · answered Sep 19 '15 at 17:06

Yes, you can use an arrow function to create new objects:

var Countable = () => {
    return {}; // This function returns a new object
};
var o = Countable();

However, you can't instantiate an arrow function, because it doesn't have the [[Construct]] internal method. So using new will throw.

1 Answers1