Compare between elements

compareElements.js

const arr1 = [{id: 5, msg: 'hshh'}, {id: 56, msg: 'hshgdh'}, {id: 7, msg: 'hshh'}] 

const arr2  = [{id: 5, msg: 'hshh'}, {id: 6, msg: 'hshgdh'}, {id: 7, msg: 'hshh'}]

const compare = (list1, list2) => {
  
  const map = new Map()
  for (let {id, msg} of list1) {
    map.set(id, msg)
  }
  
  return list2.filter(({id, msg}) => !map.has(id))
}

compare(arr1, arr2)