How to check if Two Arrays are Equal in JavaScript

How to check if Two Arrays are Equal in JavaScript ?

Answer

To check if two arrays are equal in JavaScript, you can use the every method for arrays with the same elements and the JSON.stringify method for arrays with different elements.

✐ Examples

1 Arrays with Same Elements

In this example,

We create two arrays named arr1 and arr2 with the same elements.
We then use the every method to check if the arrays are equal and store the result in the variable equal1.
The every method returns true if all elements pass the provided function condition, otherwise false.
Finally, we print the value of equal1 to the console.

JavaScript Program

const arr1 = [1, 2, 3];
const arr2 = [1, 2, 3];
const equal1 = arr1.every((val, index) => val === arr2[index]);
console.log(`Arrays are equal: ${equal1}`);

Output

Arrays are equal: true

2 Arrays with Different Elements

In this example,

We create two arrays named arr3 and arr4 with different elements.
We then use the JSON.stringify method to compare the stringified arrays and store the result in the variable equal2.
The JSON.stringify method converts a JavaScript object or value to a JSON string.
Finally, we print the value of equal2 to the console.

JavaScript Program

const arr3 = [1, 2, 3];
const arr4 = [3, 2, 1];
const equal2 = JSON.stringify(arr3) === JSON.stringify(arr4);
console.log(`Arrays are equal: ${equal2}`);

Output

Arrays are equal: false

Summary

In this tutorial, we learned How to check if Two Arrays are Equal in JavaScript language with well detailed examples.

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How to check if Two Arrays are Equal in JavaScript

How to check if Two Arrays are Equal in JavaScript ?

Answer

✐ Examples

1 Arrays with Same Elements

JavaScript Program

Output

2 Arrays with Different Elements

JavaScript Program

Output

Summary

More JavaScript Arrays Tutorials