How to Check if a JavaScript Value is an Array

In JavaScript, it is common to come across situations where you need to determine if a given value is an array. You might need to perform specific operations based on whether the value is an array or not. Luckily, JavaScript provides a convenient method called Array.isArray() to perform this check.

To determine if an object is an array, you can use the isArray() static method provided by the Array built-in object. This method was introduced in ECMAScript 5 and can be used as follows:

const list = [1, 2, 3];
Array.isArray(list); // returns true

By calling Array.isArray() and passing the value you want to check, the method will return true if the value is an array and false if it is not. In the example above, since list is an array, Array.isArray(list) returns true.

Using Array.isArray() is a reliable and straightforward way to determine whether a JavaScript value is an array or not. By leveraging this method in your code, you can easily handle different scenarios based on the type of the value passed to your functions.

Tags: JavaScript, arrays, isArray()