If you want ot learn more, you should join a good We have seen three ways to accomplish this task and the best way is to use the includes() method which checks this for you.

That's all about how to check if an array includes a value in JavaScript or not. The concat() method can take any number of array arguments. The concat() method creates a new array by merging (concatenating) existing arrays, Note that The concat() method does not change the existing arrays.

The splice() method can be used to add new items to an array, specifying what index you want to add the new items too.

The unshift() method adds a new element to an array (at the beginning), and 'unshifts' older elements, and returns the new array length.

The shift() method removes the first array element and 'shifts' all other elements to a lower index and returns the value that was 'shifted out'.

The Array.isArray() method checks if a value is an array, it returns true if the value you are looking for is present, otherwise returns false.

The indexOf() method finds the index of an element.

When you work with arrays, it is easy to remove elements and add new elements.

The push() method adds a new element to an array (at the end).

The pop() method returns the value that was 'popped out'.

The join() method also joins all array elements into a string.

All you need is to call the method needed for the task you are doing. You don’t just have to start writing them. One way would be to loop manually over all the objects from the array and check if the object exists.Īnother way would be to use the method (), which returns the object if it exists, or undefined otherwise.Array in JavaScript has its own in-built method which you can bank on at any time.

It's important to note that there are other ways to accomplish the same task.

Let's take the following phone book as an example: const people = [ Thus, in this article, you will see how to check if an array of objects contains an object with a specific value. Imagine you have an array with people, and you have the same person multiple times. Having duplicate data in your application is not desired.

Javascript check if array