The concat() method returns a new array and doesn’t change the original arrays. In this article, we will see how we can compare two JavaScript array objects using JavaScript? JavaScript Arrays Equality comparison Comparing two arrays in JavaScript using either the loose or strict equality operators (== or ===) will most often result in false, even if the two arrays contain the same elements in the same order. Python 1; Javascript; Linux; Cheat sheet; Contact; typescript compare two object arrays code example. JavaScript Program to Compare Elements of Two Arrays How do I compare two arrays in JavaScript? - 30 seconds of code 0. compare two arrays How to Compare Two JavaScript Arrays - W3docs concat The concat method concatenates two arrays, or a series of values with an array. Declare a function, which is used to compare two arrays and find common elements. iterate through all the elements in one of the arrays. Then, for each element in this array, iterate through all the elements of the other array. If the element is present in both array, then push this element to the arr array. JavaScript array It's decent for small arrays, but for larger arrays, you're really much better off using a function that drops out the moment it finds the proper value rather iterate over every element in the array. If they are of different types, return false. I have two arrays where I'm trying to find the differences that are in array 2. In this tutorial, you will learn how to find common items from two arrays in JavaScript.