merge two arrays and make data uniq by id

test.js

const mergeArray = (arr1, arr2) => {
	let arr = [...arr1, ...arr2]	
	
	const uniqueArr = arr
    .map(e => e.id)
    .map((e, i, keysArr) => keysArr.indexOf(e) === i && i)
		.filter(e => arr[e]).map(e => arr[e]);

   return uniqueArr;
	
}