[Sparta Coding Club] Week 2 — Today I learned

Key Concepts Learned Today:

1. JavaScript:

• Explored closures in JavaScript and how they allow functions to retain access to their lexical scope even after the parent function has finished executing.
• Delved into the ES6 features such as arrow functions, template literals, and destructuring assignments, enhancing code readability and conciseness.
• Learned about the importance of event delegation in JavaScript, optimizing performance by attaching event listeners to parent elements rather than individual child elements.

1. AJAX (Asynchronous JavaScript and XML):

• Implemented AJAX requests using the Fetch API, discovering its simplicity and power in making asynchronous HTTP requests and handling responses.
• Explored techniques for handling AJAX loading indicators and error messages, providing users with feedback during data fetching processes.
• Learned about CORS (Cross-Origin Resource Sharing) and its implications for AJAX requests, understanding how to configure servers to allow cross-origin requests securely.

1. JSON (JavaScript Object Notation):

• Delved into JSON Schema and its role in defining the structure and validation rules for JSON data, ensuring consistency and integrity across web applications.
• Explored techniques for parsing and serializing JSON data in JavaScript, including error handling and best practices for dealing with invalid JSON syntax.
• Learned about the potential security risks associated with JSONP (JSON with Padding) and explored alternatives for cross-domain data communication.

What I Want to Try Next:

• Experiment with implementing more complex AJAX functionalities, such as pagination, filtering, and sorting, to enhance user interactions and data presentation in web applications.
• Dive deeper into advanced JavaScript topics like Promises, Async/Await, and modular JavaScript patterns to improve code organization and maintainability.
• Explore real-world applications of JSON Web Tokens (JWT) for authentication and authorization in web development, understanding their role in securing API endpoints and user data.

What Went Well or Wrong:

• Went well: Successfully implemented basic AJAX functionality to fetch and display data from external APIs, gaining a better understanding of asynchronous programming in JavaScript.
• What went wrong: Encountered challenges with cross-origin issues when making AJAX requests to external APIs without proper CORS configuration, leading to unexpected errors and debugging efforts. Moving forward, I’ll prioritize addressing CORS-related issues proactively to ensure smoother data integration and application performance.