Category: Javascript

🧪 JavaScript Events – Practice Questions 🟢 Beginner Level (1–7) 1. Create a button. When clicked, change its text to “Clicked!”. 2. Create a button that shows an alert message when double-clicked. 3. Create a div. Change its background color when mouse hovers over it. 4. Create an input box. Display text “Typing…” when user…

JavaScript events allow you to make your website interactive.An event happens when a user does something like clicking, typing, or submitting a form. 👉 Example: 🖱️ 1. Mouse Events These events happen when the user uses the mouse. Common Mouse Events: Example: ⌨️ 2. Keyboard Events These events happen when user types on keyboard. Common…

🟢 Beginner Level (1–10) 🟡 Intermediate Level (11–20) 🔵 Advanced Level (21–30) 🔥 Bonus Challenge (Real-world) 👉 Build a mini app combining multiple DOM concepts: 💡 Tip (Very Important) 👉 First 10 → Basics👉 Next 10 → Logic building👉 Last 10 → Real-world projects

🧠 What is DOM? DOM = Document Object Model 👉 When a webpage loads, the browser converts HTML into a tree structure (objects). Example HTML: DOM representation: Document └── h1 (id=”title”) └── “Hello” 👉 JavaScript can access and modify this structure. 🎯 Selecting Elements To change anything on a page, first you must select it.…

🔹 What is an Object? An object is a collection of data stored in key-value pairs. 👉 Real-life example:A student has name, age, marks → all grouped together. 🔹 Object Properties Properties are variables inside an object. 👉 Two ways to access: 🔹 Object Methods Methods are functions inside an object. 👉 this refers to…

🟢 Basic Level (1–15) 🟡 Intermediate Level (16–30) 🟠 Advanced Level (31–50) 🎯 Bonus Challenge

📌 What is an Array? An array is a collection of values stored in a single variable. 🛠️ Creating Arrays 1. Using [] 2. Using Array constructor 🎯 Accessing Elements 👉 Index starts from 0 ⚙️ Basic Array Methods ➕ push() → Add at end ➖ pop() → Remove from end ⬅️ shift() → Remove…

🔹 Basic Level (1–7) 🔹 Intermediate Level (8–14) 🔹 Advanced Level (15–20) 🚀 for students 👉 Combine everything: Mini project using functions (calculator app)

🔹 What is a Function? A function is a block of code that performs a specific task and can be reused. 👉 Instead of writing code again and again, you call a function. 🔹 Function Declaration Defined using the function keyword. ✔️ Can be called before declaration (hoisting) 🔹 Function Expression Function stored inside a…

🟢 Beginner Level Projects 1. 🎯 Number Guessing Game 👉 User guesses a number between 1–10 Concepts: Extra ideas: 2. 🔢 Multiplication Table Generator 👉 User enters a number → show table Concepts: 3. 🧮 Simple Calculator 👉 Perform +, −, ×, ÷ Concepts: Bonus: 4. 🔐 Even/Odd Checker Tool 👉 Input number → show…