differen ce between array[2] and array[] code example

Example 1: array differenc javascript

let difference = arr1.filter(x => !arr2.includes(x));

Example 2: diff two arrays javascript

function diffArray(arr1, arr2) {
  return arr1
    .concat(arr2)
    .filter(item => !arr1.includes(item) || !arr2.includes(item));
}