The Javascript array.includes() method is used to know whether a particular element is present in the array or not and accordingly, it returns true or false i.e, if the element is present, then it returns true otherwise false.
Syntax:
array.includes(searchElement, start)
Parameters: This method accepts two parameters as mentioned above and described below:
- searchElement: This parameter holds the element which will be searched.
- start: This parameter is optional and it holds the starting point of the array, where to begin the search the default value is 0.
Return Value: It returns a Boolean value i.e., either True or False.
Below is an example of the Array includes() method.
Example: In this example, we will see if a value is included in an array or not using the Array includes() method.
javascript
let name = ['gfg', 'cse', 'neveropen', 'portal']; a = name.includes('gfg') // Printing result of includes() console.log(a); |
Output:
true
The below examples illustrate the Array includes() method in JavaScript:
Example 1: In this example, the method will search for element 2 in that array.
javascript
// Taking input as an array A // having some elements. let A = [1, 2, 3, 4, 5]; // includes() method is called to // test whether the searching element // is present in given array or not. a = A.includes(2) // Printing result of includes(). console.log(a); |
Output:
true
Example 2: In this example, the method will search for the element ‘cat’ in that array and returns false as ‘cat’ is not present in the array.
javascript
// Taking input as an array A // having some elements. let name = ['gfg', 'cse', 'neveropen', 'portal']; // includes() method is called to // test whether the searching element // is present in given array or not. a = name.includes('cat') // Printing result of includes() console.log(a); |
Output:
false
We have a complete list of Javascript Array methods, to check those please go through this Javascript Array Complete referencearticle.
Supported Browsers: The browsers supported by JavaScript Array includes() method are listed below:
- Google Chrome 47.0
- Microsoft Edge 14.0
- Mozilla Firefox 43.0
- Safari 9.0
- Opera 34.0
We have a Cheat Sheet on Javascript where we covered all the important topics of Javascript to check those please go through Javascript Cheat Sheet-A Basic guide to JavaScript.
