Sometimes, we want to check whether multiple values exist within an JavaScript array.

In this article, we’ll look at how to check whether multiple values exist within an JavaScript array.

How to check whether multiple values exist within an JavaScript array?

To check whether multiple values exist within an JavaScript array, we use the array every and includes methods.

For instance, we write

const containsAll = arr1.every((i) => arr2.includes(i));

to call every with a function that returns whether item i in arr is in the array arr2 with includes.

If every element of arr1 is in arr2, then true is returned.

Conclusion

To check whether multiple values exist within an JavaScript array, we use the array every and includes methods.