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How to Update Object with More Object in JavaScript

Sep 29, 2024

Updating an object with more object in JavaScript can be achieved by merging two objects together. There are several ways to accomplish this, such as using the spread operator, Object.assign() method, or a library like Lodash. Let's explore how to do this with some simple examples.

Using the Spread Operator:

One of the easiest ways to merge two objects is by using the spread operator. Here's an example:

```javascript

const originalObj = {a: 1, b: 2};

const additionalObj = {b: 3, c: 4};

const mergedObj = {...originalObj, ...additionalObj};

console.log(mergedObj); // Output: {a: 1, b: 3, c: 4}

```

Using Object.assign() method:

Another way to update an object with more object is by using the Object.assign() method. Here's an example:

```javascript

const originalObj = {a: 1, b: 2};

const additionalObj = {b: 3, c: 4};

const mergedObj = Object.assign({}, originalObj, additionalObj);

console.log(mergedObj); // Output: {a: 1, b: 3, c: 4}

```

Using Lodash Library:

If you prefer using a library, Lodash provides a convenient method for merging objects. Here's an example using Lodash's merge() method:

```javascript

const _ = require('lodash');

const originalObj = {a: 1, b: 2};

const additionalObj = {b: 3, c: 4};

const mergedObj = _.merge({}, originalObj, additionalObj);

console.log(mergedObj); // Output: {a: 1, b: 3, c: 4}

```

It's important to note that when merging objects, properties from the second object will overwrite properties with the same key in the first object. This means that if both objects have a property with the same name, the value from the additional object will be used in the merged object.

In conclusion, updating an object with more object in JavaScript can be done using various methods such as the spread operator, Object.assign() method, or a library like Lodash. Each method has its own advantages and use cases, so choose the one that best fits your needs.

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