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About Developer

Khamisi Kibet

Khamisi Kibet

Software Developer

I am a computer scientist, software developer, and YouTuber, as well as the developer of this website, spinncode.com. I create content to help others learn and grow in the field of software development.

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    infor@spinncode.com

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    Nairobi, Kenya
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7 Months ago | 52 views

**Course Title:** Modern JavaScript Programming: From Fundamentals to Full-Stack Development **Section Title:** DOM Manipulation and Event Handling **Topic:** Create an interactive web page that responds to user input by manipulating the DOM.(Lab topic) **Objective:** Create an interactive web page that accepts user input and responds by dynamically updating the DOM. **Materials:** * A text editor or IDE (e.g., Visual Studio Code) * A web browser (e.g., Chrome, Firefox) * Familiarity with HTML, CSS, and JavaScript **What You Will Learn:** * How to create an interactive web page using HTML, CSS, and JavaScript * How to attach event listeners to DOM elements * How to manipulate the DOM in response to user input * Best practices for creating dynamic and interactive web pages **Step 1: Create the HTML Structure** Create an HTML file (`index.html`) and add the following code: ```html <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Interactive Web Page</title> <style> body { font-family: Arial, sans-serif; } input { padding: 10px; font-size: 16px; } button { padding: 10px; font-size: 16px; } </style> </head> <body> <h1>Interactive Web Page</h1> <input type="text" id="nameInput" placeholder="Enter your name"> <button id="greetButton">Greet Me!</button> <div id="greetingMessage"></div> <script src="script.js"></script> </body> </html> ``` This HTML code creates a simple web page with a text input field, a button, and a `div` element to display the greeting message. **Step 2: Write the JavaScript Code** Create a JavaScript file (`script.js`) and add the following code: ```javascript // Get the input field and button elements const nameInput = document.getElementById('nameInput'); const greetButton = document.getElementById('greetButton'); const greetingMessage = document.getElementById('greetingMessage'); // Add an event listener to the button greetButton.addEventListener('click', () => { // Get the user's name from the input field const userName = nameInput.value; // Create a greeting message based on the user's name const greetingMessageText = `Hello, ${userName}!`; // Update the greeting message element with the new text greetingMessage.textContent = greetingMessageText; }); ``` This JavaScript code gets the input field, button, and greeting message elements using `document.getElementById()`. It then adds an event listener to the button using `addEventListener()`, which triggers a function when the button is clicked. **Step 3: Manipulate the DOM** In the event listener function, the code gets the user's name from the input field using `nameInput.value`. It then creates a greeting message based on the user's name using template literals. Finally, the code updates the greeting message element using `greetingMessage.textContent`, which is a property of the DOM element. **Best Practices:** * Use `const` for variables that do not change. * Use `let` for variables that may change. * Use arrow functions for event listeners. * Use template literals for string interpolation. * Use `textContent` to update the text content of a DOM element. **Conclusion:** In this lab, you created an interactive web page that accepts user input and responds by dynamically updating the DOM. You learned how to attach event listeners to DOM elements, manipulate the DOM in response to user input, and follow best practices for creating dynamic and interactive web pages. **External Resources:** * [MDN Web Docs: Introduction to the DOM](https://developer.mozilla.org/en-US/docs/Web/API/Document_Object_Model/Introduction) * [MDN Web Docs: Event Listeners](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener) **Comments and Questions:** If you have any comments or questions about this lab, please leave them below. --- Next topic: **Understanding closures and their applications.** From: Advanced JavaScript: Closures, Hoisting, and Prototypes.
Course
JavaScript
ES6+
Full-Stack
React
Node.js

Create an Interactive Web Page that Responds to User Input.

**Course Title:** Modern JavaScript Programming: From Fundamentals to Full-Stack Development **Section Title:** DOM Manipulation and Event Handling **Topic:** Create an interactive web page that responds to user input by manipulating the DOM.(Lab topic) **Objective:** Create an interactive web page that accepts user input and responds by dynamically updating the DOM. **Materials:** * A text editor or IDE (e.g., Visual Studio Code) * A web browser (e.g., Chrome, Firefox) * Familiarity with HTML, CSS, and JavaScript **What You Will Learn:** * How to create an interactive web page using HTML, CSS, and JavaScript * How to attach event listeners to DOM elements * How to manipulate the DOM in response to user input * Best practices for creating dynamic and interactive web pages **Step 1: Create the HTML Structure** Create an HTML file (`index.html`) and add the following code: ```html <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Interactive Web Page</title> <style> body { font-family: Arial, sans-serif; } input { padding: 10px; font-size: 16px; } button { padding: 10px; font-size: 16px; } </style> </head> <body> <h1>Interactive Web Page</h1> <input type="text" id="nameInput" placeholder="Enter your name"> <button id="greetButton">Greet Me!</button> <div id="greetingMessage"></div> <script src="script.js"></script> </body> </html> ``` This HTML code creates a simple web page with a text input field, a button, and a `div` element to display the greeting message. **Step 2: Write the JavaScript Code** Create a JavaScript file (`script.js`) and add the following code: ```javascript // Get the input field and button elements const nameInput = document.getElementById('nameInput'); const greetButton = document.getElementById('greetButton'); const greetingMessage = document.getElementById('greetingMessage'); // Add an event listener to the button greetButton.addEventListener('click', () => { // Get the user's name from the input field const userName = nameInput.value; // Create a greeting message based on the user's name const greetingMessageText = `Hello, ${userName}!`; // Update the greeting message element with the new text greetingMessage.textContent = greetingMessageText; }); ``` This JavaScript code gets the input field, button, and greeting message elements using `document.getElementById()`. It then adds an event listener to the button using `addEventListener()`, which triggers a function when the button is clicked. **Step 3: Manipulate the DOM** In the event listener function, the code gets the user's name from the input field using `nameInput.value`. It then creates a greeting message based on the user's name using template literals. Finally, the code updates the greeting message element using `greetingMessage.textContent`, which is a property of the DOM element. **Best Practices:** * Use `const` for variables that do not change. * Use `let` for variables that may change. * Use arrow functions for event listeners. * Use template literals for string interpolation. * Use `textContent` to update the text content of a DOM element. **Conclusion:** In this lab, you created an interactive web page that accepts user input and responds by dynamically updating the DOM. You learned how to attach event listeners to DOM elements, manipulate the DOM in response to user input, and follow best practices for creating dynamic and interactive web pages. **External Resources:** * [MDN Web Docs: Introduction to the DOM](https://developer.mozilla.org/en-US/docs/Web/API/Document_Object_Model/Introduction) * [MDN Web Docs: Event Listeners](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener) **Comments and Questions:** If you have any comments or questions about this lab, please leave them below. --- Next topic: **Understanding closures and their applications.** From: Advanced JavaScript: Closures, Hoisting, and Prototypes.

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Modern JavaScript Programming: From Fundamentals to Full-Stack Development

Course

Objectives

  • Master JavaScript fundamentals and modern ES6+ features.
  • Learn how to write clean, efficient, and maintainable JavaScript code.
  • Understand the JavaScript ecosystem including tools, libraries, and frameworks.
  • Develop expertise in front-end and back-end JavaScript development using modern frameworks like React and Node.js.

Introduction to JavaScript and Setup

  • JavaScript overview: History, role in web development, and runtime environments (browser, Node.js).
  • Setting up a development environment with Visual Studio Code, Node.js, and npm.
  • Basic syntax: Variables (var, let, const), data types, operators, and expressions.
  • Running JavaScript in the browser console and via Node.js.
  • Lab: Install Node.js and write a simple JavaScript program using modern ES6 syntax.

Control Structures and Functions

  • Conditionals (if, else, switch) and looping structures (for, while, forEach).
  • Defining and invoking functions (function expressions, declarations, and arrow functions).
  • Understanding scopes (global, function, block) and closures.
  • Default parameters and rest/spread operators.
  • Lab: Write JavaScript programs that use control structures and functions with arrow function syntax.

JavaScript Objects, Arrays, and ES6 Features

  • Creating and working with objects and arrays.
  • Introduction to ES6+ features: Destructuring, template literals, and object shorthand.
  • Iterating over arrays with `map`, `filter`, and `reduce`.
  • Using the `this` keyword and understanding its context in different scopes.
  • Lab: Manipulate arrays and objects using ES6+ methods like `map` and `reduce`.

Asynchronous JavaScript: Promises, Async/Await

  • Introduction to asynchronous programming: Callbacks vs promises.
  • Working with Promises: `then`, `catch`, and chaining.
  • Async/await syntax for handling asynchronous operations.
  • Using `fetch` for HTTP requests and handling API responses.
  • Lab: Build a program that fetches data from an API using async/await and Promises.

DOM Manipulation and Event Handling

  • Understanding the Document Object Model (DOM).
  • Selecting elements using `getElementById`, `querySelector`, and other methods.
  • Modifying the DOM: Adding, removing, and updating elements dynamically.
  • Event handling: `addEventListener`, event delegation, and managing user interactions.
  • Lab: Create an interactive web page that responds to user input by manipulating the DOM.

Advanced JavaScript: Closures, Hoisting, and Prototypes

  • Understanding closures and their applications.
  • Exploring hoisting: Variables, functions, and their scope.
  • Introduction to the prototype chain and object inheritance.
  • Advanced patterns: Immediately Invoked Function Expressions (IIFE) and module pattern.
  • Lab: Implement functions using closures and explore JavaScript’s prototype inheritance.

JavaScript Classes and OOP

  • Introduction to Object-Oriented Programming (OOP) in JavaScript.
  • Defining classes, constructors, and methods.
  • Inheritance and polymorphism with ES6 classes.
  • Private and static class members, and best practices for OOP in JavaScript.
  • Lab: Create a class-based system with inheritance, including methods and properties.

Modern Tooling: Babel, Webpack, and npm

  • Understanding module bundling with Webpack.
  • Transpiling modern JavaScript with Babel for browser compatibility.
  • Managing dependencies and scripts with npm and package.json.
  • Introduction to ES modules (`import`/`export`) vs CommonJS.
  • Lab: Set up a basic Webpack project with Babel and npm dependencies.

Front-End Development with React

  • Introduction to React and component-based architecture.
  • Functional components and hooks (useState, useEffect).
  • State management in React: Lifting state up and using context API.
  • Handling events and forms in React applications.
  • Lab: Build a simple React application that manages state and handles user input.

Back-End Development with Node.js and Express

  • Introduction to server-side JavaScript with Node.js.
  • Setting up a simple Express server and creating routes.
  • Working with middleware and handling HTTP requests and responses.
  • Connecting to a database (MongoDB or PostgreSQL) and handling CRUD operations.
  • Lab: Build a RESTful API using Node.js, Express, and a database of your choice.

JavaScript Testing: Unit, Integration, and E2E

  • Importance of testing in modern JavaScript applications.
  • Unit testing with Jest or Mocha.
  • Testing React components with React Testing Library.
  • End-to-end testing with Cypress or Selenium.
  • Lab: Write unit and integration tests for JavaScript functions and React components.

Deployment and Performance Optimization

  • Optimizing JavaScript code for performance: Lazy loading, debouncing, and throttling.
  • Code splitting and reducing bundle size with Webpack.
  • Introduction to serverless deployment with platforms like Vercel or Netlify.
  • Using Docker for containerizing JavaScript applications.
  • Lab: Deploy a full-stack JavaScript application to a cloud platform (e.g., Vercel, Heroku).

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