ecmascript 6 - Javascript: Using `.includes` to find if an array of objects contains a specific object

Question

I am a bit new to javascript ES6, and I am having difficulty understanding why the below is not functioning as expected:

let check = [{name: 'trent'},{name: 'jason'}].includes({name: 'trent'}); 
// expect true - returns false

Thanks!

Answer 1

includes essentially checks if any element === the element you're searching for. In case of objects, === means literally the same object, as in the same reference (same place in memory), not the same shape.

var a1 = { name: 'a' }
var a2 = { name: 'a' }

console.log(a1 === a2) // false because they are not the same object in memory even if they have the same data