--- title: "Chandni Kumari (@Chandni-09) | Hashnode" description: "Chandni Kumari (@Chandni-09) writes on Hashnode. Read their latest articles and follow their work." url: "https://hashnode.com/@Chandni-09" --- @Chandni-09 # Chandni Kumari @Chandni-09 · Joined January 2026 ### [CSS Selectors 101: Targeting Elements with Precision](https://chandni-09.hashnode.dev/css-selectors-101-targeting-elements-with-precision?utm_source=hashnode&utm_medium=feed) Introduction: Why CSS Selectors Are Needed Imagine you’re a teacher in a classroom. You want to: Ask all students to stand up Ask students wearing glasses to answer a question Ask a specific student to come forward You wouldn’t just shout random... 3 min read · [chandni-09.hashnode.dev](https://chandni-09.hashnode.dev/css-selectors-101-targeting-elements-with-precision?utm_source=hashnode&utm_medium=feed) [Feb 1](https://hashnode.com/posts/css-selectors-101-targeting-elements-with-precision/697f0dd3edea5d12fb058edc) ### [How a Browser Works: A Beginner-Friendly Guide to Browser Internals](https://chandni-09.hashnode.dev/how-a-browser-works-a-beginner-friendly-guide-to-browser-internals?utm_source=hashnode&utm_medium=feed) Introduction: What Really Happens When You Press Enter? You open Chrome (or any browser). You type a website address. You press Enter. And boom — a website appears. But have you ever wondered: How does the browser know where to go? How does it unde... 6 min read · [chandni-09.hashnode.dev](https://chandni-09.hashnode.dev/how-a-browser-works-a-beginner-friendly-guide-to-browser-internals?utm_source=hashnode&utm_medium=feed) [Feb 1](https://hashnode.com/posts/how-a-browser-works-a-beginner-friendly-guide-to-browser-internals/697f0a4046d1d1db23c868bf) ### [TCP Working: 3-Way Handshake & Reliable Communication](https://chandni-09.hashnode.dev/tcp-working-3-way-handshake-and-reliable-communication?utm_source=hashnode&utm_medium=feed) Introduction: What If Data Was Sent Without Rules? Imagine you’re sending a long message to a friend, but: Some words disappear Some lines arrive twice The ending arrives before the beginning You never know if the message was received Now imagi... 5 min read · [chandni-09.hashnode.dev](https://chandni-09.hashnode.dev/tcp-working-3-way-handshake-and-reliable-communication?utm_source=hashnode&utm_medium=feed) [Feb 1](https://hashnode.com/posts/tcp-working-3-way-handshake-and-reliable-communication/697f064e7305593d43aefb5d) ### [TCP, UDP, and HTTP Explained Like You’re New to the Internet](https://chandni-09.hashnode.dev/tcp-udp-and-http-explained-like-youre-new-to-the-internet?utm_source=hashnode&utm_medium=feed) Introduction: The Internet Is Chaos Without Rules We want to send a message to our friend. But instead of WhatsApp, we are shouting that message into the air. What if: Half the message is lost? It reaches late? It reaches the wrong person? Or it ... 5 min read · [chandni-09.hashnode.dev](https://chandni-09.hashnode.dev/tcp-udp-and-http-explained-like-youre-new-to-the-internet?utm_source=hashnode&utm_medium=feed) [Feb 1](https://hashnode.com/posts/tcp-udp-and-http-explained-like-youre-new-to-the-internet/697f010f2658aa1a57e52c77) ### [Emmet for HTML: A Beginner’s Guide to Writing Faster Markup](https://chandni-09.hashnode.dev/emmet-for-html-a-beginners-guide-to-writing-faster-markup?utm_source=hashnode&utm_medium=feed) Introduction When we start learning HTML, everything feels exciting at first. We finally understand how websites are built, what tags are, and how elements appear on a page. But very soon, another feeling kicks in. We realize that writing HTML takes ... 5 min read · [chandni-09.hashnode.dev](https://chandni-09.hashnode.dev/emmet-for-html-a-beginners-guide-to-writing-faster-markup?utm_source=hashnode&utm_medium=feed) [Feb 1](https://hashnode.com/posts/emmet-for-html-a-beginners-guide-to-writing-faster-markup/697ef9f8ecfe18d6563d190a)