NodeJS Count how many objects in array?

Question

How would I count how many objects there are inside an array?

The array looking like:

[ {id: 1}, {id: 2}, ...]

I assume I could use

Answer 1

Use .length

var data = [{
    id: 1
}, {
    id: 2
}];

console.log(data.length);

Update, in your edit I see that

offer.items_to_receive is undefined, ensure that object offer has property items_to_receive (should be array);