dedup-obj-array.js

const data = [
  { id: 1, name: 'Foo-Dup' },
  { id: 1, name: 'Foo' },
  { id: 2, name: 'Bar' },
  { id: 3, name: 'Baz-Dup' },
  { id: 3, name: 'Baz' }
];

function dedupByKey(key, arr) {
  const map = new Map();
  for (const obj of arr) {
    map.set(obj[key], obj);
  }
  return [...map.values()];
}

console.log(dedupByKey('id', data));