Array.prototype.includes () - JavaScript | MDN
Jul 20, 2025 · The includes() method of Array instances determines whether an array includes a certain value among its entries, returning true or false as appropriate.
JavaScript Array includes () Method - W3Schools
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How do I check if an array includes a value in JavaScript?
Modern browsers have Array#includes, which does exactly that and is widely supported by everyone except IE: You can also use Array#indexOf, which is less direct, but doesn't require polyfills for …
JavaScript Array includes() Method
This tutorial shows you how to use the JavaScript Array includes () method to check if an array contains a specified element.
JavaScript Array includes () Method - GeeksforGeeks
Jul 11, 2025 · The includes () method in JavaScript returns true if an array contains a specified value, and false if the value is not found. This method simplifies checking for the presence of an element …
Array.prototype.includes () - JavaScript | MDN
May 26, 2017 · The includes () method determines whether an array includes a certain element, returning true or false as appropriate.
JavaScript Array includes () (With Examples) - Programiz
In this tutorial, you will learn about the JavaScript Array include () method with the help of examples. The includes () method checks if an array contains a specified element or not.
Check if an Item is in an Array in JavaScript - freeCodeCamp.org
Jun 28, 2022 · You can use the includes() method in JavaScript to check if an item exists in an array. You can also use it to check if a substring exists within a string. It returns true if the item is found in …
JavaScript Array includes (): Check If an Array Contains ... - AppDividend
Aug 28, 2025 · The JavaScript Array includes () method checks whether an array contains a specified value (either a primitive or a reference type) among its elements. It returns a boolean value: true if …
Understanding `Array.includes ()` in JavaScript - DEV Community
Jun 12, 2025 · 🧠 What is Array.prototype.includes()? The includes() method determines whether an array contains a specified element. It returns a boolean: true if the element is found, false otherwise. …