combine 2 22arrays with objects 22 and remove object duplicates javascript

1var merged = [...initialData, ...newData.filter(d => !ids.has(d.ID))];

1// Join Without Dupes.
2const joinWithoutDupes = (A, B) => {
3  const a = new Set(A.map(x => x.item))
4  const b = new Set(B.map(x => x.item))
5  return [...A.filter(x => !b.has(x.item)), ...B.filter(x => !a.has(x.item))]
6}
7
8// Proof.
9const output = joinWithoutDupes([{item:"apple",description: "lorem"},{item:"peach",description: "impsum"}], [{item:"apple", description: "dolor"},{item:"grape", description: "enum"}])
10console.log(output)