Four Methods to Search Through Arrays in JavaScript

 

Introduction

In JavaScript, you will often be working with data that is stored in Arrays. A common task will be searching the array to find if it contains a value (or values) that satisfies certain search criteria. Depending on the task at hand, you may be interested in a boolean value for confirmation, an index for the position of the value in the array, or a separate array containing all the search results.

Prior to ECMAScript 6, you probably would have used a for loop to iterate through all the items in the array and perform operations on each item. Now there are several built-in utility methods that solve some of the common tasks for searching for values in an array.

In this article, you will learn about Array.includes(), Array.indexOf, Array.find(), and Array.filter.