JSFiddle - React, Tailwind, and code Playground

by Hugo Carneiro

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.min.js"></script>

JavaScript

var oldArr = ['bold'];
var newArr = ['bold', 'italic'];

var diff = _.difference(newArr, oldArr);

console.log(diff);