JSFiddle - React, Tailwind, and code Playground

JavaScript

const arrayDifference = (arr1, arr2) => {
  return arr1.filter(x => !arr2.includes(x))
    .concat(arr2.filter(x => !arr1.includes(x)));
};

const array1 = [1, 2, 3, 5];
const array2 = [1, 2, 3, 4, 5];

const diff = arrayDifference(array2, array1);

console.log(diff);