Why does Javascript Set not do unique objects?

Question

Sets are supposed to contain unique objects, but it doesn't work for objects in javascript.

var set = new Set() <- undefined set.add({name:'a', value: 'b'}) <- Set {Object {name: "a", value: "b"}} set.add({name:'a', value: 'b'}) <- Set {Object {name: "a", value: "b"}, Object {name: "a", value: "b"}} 

It works for primitives

var b = new Set() <- undefined b.add(1) <- Set {1} b.add(2) <- Set {1, 2} b.add(1) <- Set {1, 2} 

So how do I get it to work with objects? I get the fact that they are different objects with the same values, but I'm looking for like a deep unique set.

EDIT:

Here's what I'm actually doing

    var m = await(M.find({c: cID}).populate('p')) //database call     var p = new Set();     m.forEach(function(sm){         p.add(sm.p)     }) 

This is to get a unique list of sm.p

Answer 1

well, if you are looking for a deep unique set, you can make a deep set by youself, by extending the original 'Set', like this:

function DeepSet() {     // } DeepSet.prototype = Object.create(Set.prototype); DeepSet.prototype.constructor = DeepSet; DeepSet.prototype.add = function(o) {     for (let i of this)         if (deepCompare(o, i))             throw "Already existed";     Set.prototype.add.call(this, o); };