If it is larger than or equal to the array length, false will be returned.If not specified, it will default to 0 (searching from the beginning of the array).Matching values previous to this index will be ignored.fromIndex is the index position to start searching the array.searchFor is the element you wish to search the array for.The syntax for the JavaScript Array includes() method is as follows: array.includes(searchFor, fromIndex) When called, it will return true or false depending on whether the array it is called from contains the specified value JavaScript includes() Method Syntax The includes() method is built in to the JavaScript array type and is available on any array value or variable. The includes() Method to Search for an Element in an Array Indexes are integer values, which start counting from 0 (zero) for the first item in the array – so the first item in an array is at index 0, the second item is at index 1, and so onĪrrays can hold any kinds of values, and references to other variables – they’re a flexible way of storing a list of values or objects of any length – from the rows in a table to the enemies on-screen in a video game.

The index can be used to access each value in the array. Arrays in JavaScriptĪrrays are a type of variable that hold an ordered list of values. Each value in an array has a position within the array, called the index. Code examples to check whether an array includes a value are provided.

This article will show you how to check if a value is in an array in the JavaScript programming language.

Array contains javascript