Are you looking to update or modify the properties of a JavaScript object by pushing new keys into it? If so, you've come to the right place. In this article, we'll discuss various techniques for achieving this task effectively.

### Understanding Objects in JavaScript

Before we delve into pushing keys into objects, let's have a quick overview of objects in JavaScript. Objects are a fundamental data type in JavaScript, and they are used to store collections of key-value pairs. Each key is a unique identifier for a property, and each value is the content of the property.

### Using Dot Notation

One of the most common ways to push keys into objects is by using dot notation. If the object already exists, you can simply assign a new key to the object using dot notation like this:

```

const myObject = {};

myObject.newKey = 'someValue';

```

This method is straightforward and works well for adding new properties to an object. However, it is not suitable for dynamic key-value pairs or when the key is contained in a variable.

### Using Bracket Notation

When working with dynamic keys or keys contained in variables, it's best to use bracket notation. This allows you to push new keys into objects using a variable as the key:

```

const myObject = {};

const newKey = 'dynamicKey';

myObject[newKey] = 'someValue';

```

By using bracket notation, you can dynamically assign new keys to an object based on the value of a variable. This makes the process more flexible and adaptable to different scenarios.

### Using Object.assign()

If you want to push multiple key-value pairs into an object at once, you can use the `Object.assign()` method. This method is used to copy the values of all enumerable own properties from one or more source objects to a target object:

```

const targetObject = { key1: 'value1' };

const sourceObject = { key2: 'value2' };

Object.assign(targetObject, sourceObject);

```

In this example, the `targetObject` will now have both `key1` and `key2` with their respective values. This method is particularly useful for merging objects or updating multiple properties at once.

### Conclusion

Pushing keys into objects in JavaScript is an essential skill for any developer working with the language. By using the various techniques discussed in this article, you can efficiently update and modify object properties to meet the requirements of your application. Whether you prefer dot notation, bracket notation, or the `Object.assign()` method, there's a suitable approach for every scenario. Keep experimenting and refining your skills to become proficient in working with objects in JavaScript.