How can I add a key/value pair to a JavaScript object?

Cover Image for How can I add a key/value pair to a JavaScript object?
Matheus Mello
Matheus Mello
published a few days ago. updated a few hours ago

📝 Adding a Key/Value Pair to a JavaScript Object: Easy Peasy! 🚀

So, you have this awesome JavaScript object, filled with key/value pairs. 🎉 But now, you're faced with a new challenge. You want to add another key/value pair to your existing object, but you're not quite sure how to do it. No worries, my friend! I've got you covered. 💪

🧩 The Challenge: A Missing Piece 🧩

Take a look at your object literal:

var obj = {key1: value1, key2: value2};

You want to add a key3 field with a corresponding value3, but how do you achieve this? 🤔

🌟 Simple Solutions to the Rescue! ✨

  1. 📌 Option 1: Dot Notation 🌟

    One way to add a new key/value pair is by using dot notation:

    obj.key3 = value3;

    See how beautiful and easy that was? JavaScript lets you access and add properties using the dot (.) notation. 🌈

  2. 📌 Option 2: Bracket Notation 🌟

    Another option, and equally powerful, is to use bracket notation:

    obj['key3'] = value3;

    The bracket notation permits you to access and add new properties using strings. It's like being part of an exclusive club for creative thinkers. 🎨

That's it! You've added a new key/value pair to your JavaScript object, and the possibilities are endless. 🚀

💥 Go Beyond and Ignite Innovation! 💥

Now that you know how to add a key/value pair like a pro, why not level up your JavaScript skills? Are you interested in deep-diving into object manipulation, exploring other data structures, or discovering more about JavaScript's hidden treasures? Leave a comment and let me know! I would be thrilled to create more content to help you on your coding journey. 🙌

Remember, the sky's the limit when it comes to coding! ✨

Keep hacking and stay awesome! 😎👩‍💻👨‍💻


Disclaimer: This blog post assumes you have a basic understanding of JavaScript. If you're just starting, don't worry! Dive into some beginner-friendly tutorials, and soon you'll be rocking this too! 💪


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