Compare 2 array and fetch unequal field

Question

let arr1=[1,2,3]
let arr2=[1,2,3,4,5,6]

I want to compare 2 array and obtain the array list which is not in arr1

i.e output as arr3=[4,5,6]

Approaches using lodash/Javascript

Answer 1

Use diffrence method from lodash

 _.difference([1,2,3,4,5,6], [1,2,3]);