How To Check If An Array Is The Same As Another Array In Javascript?

In this tutorial we are learn How do you check if an array contains element from another array Javascript?. I found this short and sweet syntax to match all or some elements between two arrays. Or Does item exist in array?

We Use some operator and include operator Very easy to use this tutorial we learn The simplest and fastest way to check if an item is present in an array is by using the some and include operator See below:

How To Check If An Array Is The Same As Another Array In Javascript?

For example

Ex. 1 - OR operator find if any of array2 elements exists in array1. This will return as soon as there is a first match as some method breaks when function returns TRUE

let array1 = ['a', 'b', 'c', 'd', 'e'], array2 = ['a', 'b'];

console.log(array2.some(ele => array1.includes(ele)));

Return: True

Ex. 2 - AND operator find if all of array2 elements exists in array1. This will return as soon as there is a no first match as some method breaks when function returns TRUE

let array1 = ['a', 'b', 'c', 'd', 'e'], array2 = ['a', 'x'];

console.log(!array2.some(ele => !array1.includes(ele)));

Return: False

I hope it can help you...

Robert look

Author, Web Developer (Front-end & Back-end)

My Name is Robert look from New york, America. I'm a Web Application Developer with 6 years of experience. Currently, I'm working on front-end & back-end web development using popular web technology Languages. That's why I love to share my coding knowledge in a smart way.