javascript - es6 unique array of objects with set

Question

I came across this example for creating unique arrays with es6

[ ...new Set(array) ]

Which seems to work fine until I tried it with an array of objects and it didn't return unique array.

i.e.

let item = [ ...new Set([{id:123,value:'test'},{id:123,value:'test'}]) ];

Why is that ?

Answer 1

Why is that ?

As per documentation

The Set object lets you store unique values of any type, whether primitive values or object references.

Now reference for each of those arrays inside that Set constructor will be different so they are not considered to be a unique value by the constructor.