3️⃣ Control Statements (Decision Making)

Control statements help your program make decisions based on conditions. ✅ 1. if Statement Runs code only if condition is true 👉 If condition is true → code runs👉 If false → nothing happens ✅ 2. if…else Runs one block if true, another if false ✅ 3. else if Used when checking multiple conditions ✅ […]

🔹 1. Variables Variables are used to store data. ✅ var ✅ let ✅ const 🔹 2. Data Types 📌 String Text values 📌 Number Numbers (integer or decimal) 📌 Boolean True or False 📌 Undefined Variable declared but not assigned 📌 Null Empty value (intentionally) 📌 Object Collection of key-value pairs 📌 Array List […]

✅ What is JavaScript? JavaScript is a programming language used to make websites interactive and dynamic. 👉 Without JavaScript: 👉 With JavaScript: 📌 Example: 📜 History of JavaScript 👉 Important: 📈 Today: ⚔️ JavaScript vs HTML vs CSS Technology Purpose HTML Structure (Skeleton) CSS Design (Styling) JavaScript Behavior (Brain) 👉 Example: 🌐 How JavaScript Works […]

      <div class=”text-right mt-4″>         <button id=”downloadBtn” class=”btn btn-outline-secondary”>Download HTML</button>       </div>

To add underscores between words in a JavaScript string, effectively replacing spaces with underscores, you can use the replace() or replaceAll() methods, or a combination of split() and join(). 1. Using replace() with a Regular Expression: This method uses a regular expression to find all occurrences of spaces and replaces them with an underscore. The /g flag ensures a global replacement (all occurrences, not just the first). […]

You can create user preferences in JavaScript by storing the choice when the user clicks something, and then reloading it whenever the page is opened again. The usual way is to use localStorage or cookies. Here’s a step-by-step example: Example: Save User Theme Preference (Dark/Light Mode) HTML JavaScript CSS How It Works

Browser: Native Streaming (no library)