JavaScript Array includes () Method - W3Schools
Description The includes() method returns true if an array contains a specified value. The includes() method returns false if the value is not found. The includes() method is case sensitive.
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.
How do I check if an array includes a value in JavaScript?
What is the most concise and efficient way to find out if a JavaScript array contains a value? This is the only way I know to do it: function contains (a, obj) { for (var i = 0; i < a.length;...
How to check if an array includes an object in JavaScript
Jul 11, 2025 · The includes () method checks if an array contains a specific object by reference. It returns true if the exact object reference is found in the array, making it useful when you need to …
How to Check if an Array Contains a Value in Javascript
In this tutorial, you'll learn how to check if an array contains a value, either a primitive value or object, in JavaScript.
JavaScript Array Contains: 6 Methods to Find a Value | Built In
Jun 12, 2025 · Finding a value in an array is useful for effective data analysis. Learn how to discover what a JavaScript Array contains using indexOf, includes, for loop, some methods and more.
JavaScript Array Includes: How to Check for Specific Values
Mar 28, 2025 · JavaScript array includes is the easiest way to check if an array contains a specific value. The includes() method provides a straightforward approach, while indexOf(), find(), and some() offer …
Check if an array contains any element of another array in JavaScript
May 1, 2013 · Use a for loop and iterate over the target array. If every element is contained within the current array (use current.indexOf(elem) !== -1), then they're all in there.
Syntax & Examples of JavaScript Array Contain - EDUCBA
Guide to JavaScript Array Contain. Here we discuss the syntax of a javascript array contain along with examples and its code implementation.
JavaScript - Check if JS Array Includes a Value?
Jul 23, 2025 · To check if an array includes a value we can use JavaScript Array.includes () method. This method returns a boolean value, if the element exists it returns true else it returns false.