How to Set Dynamic Property Keys with ES6 ?
Tags: javascript
Published: 2023-10-01 10:16:01

---
title: How to Set Dynamic Property Keys with ES6 ?
published: true
date: 2023-10-01 09:49:00 UTC
tags: javascript
canonical_url: https://www.technilesh.com/2023/10/how-to-set-dynamic-property-keys-with.html
---

#[How to Set Dynamic Property Keys with ES6](https://www.technilesh.com/2023/10/how-to-set-dynamic-property-keys-with.html)


In the world of programming, we often find ourselves faced with the challenge of manipulating objects and their properties dynamically. How can we create and access object properties when we don't know their names in advance? Well, that's where ES6, the sixth version of ECMAScript, comes to the rescue with some nifty features. In this blog post, we'll explore how to set dynamic property keys with ES6, making your JavaScript code more flexible and efficient.

## **The Power of Computed Property Names**

Imagine you have an object, and you want to set a property with a name based on some dynamic value. In ES6, we can use computed property names to achieve this. These are enclosed in square brackets `[]`, and the expression inside the brackets is evaluated as the property name. Let's see an example:

```javascript
const dynamicKey = 'color';
const myObject = {
  [dynamicKey]: 'blue',
};

console.log(myObject.color); // Outputs: 'blue'
```

In this example, we set the `dynamicKey` variable as the property name within square brackets, and it creates a property with the name 'color' in the `myObject`.

## **Using Functions for Dynamic Property Keys**

What if you want to go a step further and use a function to determine property names? No worries; ES6 has us covered. Here's how you can do it:

```javascript
function getPropertyKey() {
  return 'quantity';
}

const product = {
  [getPropertyKey()] : 10,
};

console.log(product.quantity); // Outputs: 10
```

In this case, the `getPropertyKey` function returns 'quantity,' and this becomes the property name for the `product` object. This approach is incredibly useful when you need to compute property names based on certain conditions or logic.

## **Dynamic Property Deletion**

With great power comes great responsibility. You might need to remove dynamically named properties at some point. Fortunately, you can use the `delete` operator in conjunction with computed property names to achieve this:

```javascript
const user = {
  name: 'Alice',
  age: 30,
};

const propertyToDelete = 'age';
delete user[propertyToDelete];

console.log(user.age); // Outputs: undefined
```

By setting `propertyToDelete` as the property name in square brackets, we can remove the 'age' property from the `user` object.

## **Wrapping Up**

Setting dynamic property keys with ES6 opens up a world of possibilities for flexible and efficient JavaScript coding. Computed property names and functions can help us create, access, and even delete properties in objects on the fly. Whether you're working with user data, configurations, or any other dynamic content, ES6 empowers you to make your code adapt to various scenarios.

So, next time you find yourself juggling object properties dynamically, remember that ES6 is here to simplify your life. Embrace the power of computed property names, and watch your code become more versatile and easier to manage. Happy coding!keys...