How to compare two objects - JavaScript

In this article we will learn how to compare two objects in JavaScript.

It is very common to compare two objects in JavaScript in JavaScript.

Problem

Now we have a problem which is that we want to compare two objects.

Imagine that you have two objects here, and you want to compare them

// object
const object1 = {
    name: "John",
    age: 30,
};

// object
const object2 = {
    name: "John",
    age: 30,
};

How to solve this problem?

There are many ways to compare objects in JavaScript such as:

• Using isEqual() method
• Using JSON.stringify().

Compare two objects using isEqual() method

We can use isEqual() method to compare two objects in JavaScript.

Let's see an example

const loadash = require('lodash');

const object1 = {
    name: "John",
    age: 30,
};

const object2 = {
    name: "John",
    age: 30,
};

if (loadash.isEqual(object1, object2)) {
    console.log(true);
} else {
    console.log(false);
}

Output

true

Compare two objects using JSON.stringify() method

We can use JSON.stringify() to compare two objects as well.

Example

// object
const object1 = {
    name: "John",
    age: 30,
};

// object
const object2 = {
    name: "John",
    age: 30,
};

// Compare
if (JSON.stringify(object1) === JSON.stringify(object2)) {
    console.log(true);
} else {
    console.log(false);
}

Output

true

Thank you for reading

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