diff.js

let _ = require('lodash');

let arr = [1, 5, 10];
let arr2 = [1, 4, 10];

let result = _.difference(arr, arr2); // 5
let result2 = _.difference(arr2, arr); // 4

let diffTogether = [...result, ...result2]; // [ 5, 4 ]
let newSet = new Set([...arr, ...arr2]); // Set(1, 4, 5, 10)

let matched = _.difference([...newSet], diffTogether); // [ 1, 10 ]

console.log(matched); // [ 1, 10 ]
console.log(diffTogether); // [ 5, 4]