JavaScript

Middleware is not a new concept in web development. It is typically associated with backend frameworks like Express.js, where there is a lot of authentication, logging, etc. Because of its inherent advantages, middleware has gained significant traction in the frontend. Frontend frameworks such as React are adopting it as a way to handle complex functionalities during state management. In this guide, we’ll walk you through the concept of middleware in React and how to use it to enhance your React…

Every programming language comes with its own set of security vulnerabilities, and JavaScript is no exception. Exploiting JavaScript vulnerabilities can lead to data manipulation, session hijacking, unauthorized data access, and more. Although commonly associated with client-side functionality, JavaScript security risks can also pose significant threats in server-side environments. For any application, customer trust is highly important. Maintaining this trust requires safeguarding customer data and ensuring the security of applications. Fortunately, implementing proper safeguards can mitigate these risks and enhance the…

ReactJS has become a go-to library for building dynamic and responsive user interfaces. However, as applications grow, managing asynchronous data streams becomes more challenging. Enter RxJS, a powerful library for reactive programming using observables. RxJS operators simplify handling complex asynchronous data flows, making your React components more manageable and efficient. In this article, we’ll explore RxJS operators within the context of ReactJS. We’ll walk through step-by-step examples, demonstrating how to integrate RxJS into your React applications. By the end of…

In programming, object mutation implies that an object’s state or data is mutated after creation. In other words, the operation that changes the attributes of an object in JavaScript is known as object mutation. Object mutation alters an object’s values directly, making it challenging, particularly in applications where multiple operations may try to read from or write to an object simultaneously. This article presents a discussion on object mutation in JavaScript with relevant code examples wherever necessary. Data Types in…

Error handling is a fundamental aspect of programming that ensures applications can gracefully handle unexpected situations. In JavaScript, while try-catch is commonly used, there are more advanced techniques to enhance error handling.  This article explores these advanced methods, providing practical solutions to improve your error management strategies and make your applications more resilient. What Is Error Handling? The Purpose of Error Handling Error handling anticipates, detects, and responds to issues that arise during program execution. Proper error handling improves user…

Metaprogramming is a powerful programming paradigm that allows code to dynamically manipulate its behavior at runtime. JavaScript, with the introduction of Proxies and the Reflect API in ES6, has taken metaprogramming capabilities to a new level, enabling developers to intercept and redefine core object operations like property access, assignment, and function invocation. This blog post dives deep into these advanced JavaScript features, explaining their syntax, use cases, and how they work together to empower dynamic programming. What Are Proxies? A…

Background What Is PL/SQL? PL/SQL is a procedural language designed specifically to embrace SQL statements within its syntax. It includes procedural language elements such as conditions and loops and can handle exceptions (run-time errors). PL/SQL is native to Oracle databases, and databases like IBM DB2, PostgreSQL, and MySQL support PL/SQL constructs through compatibility features. What Is a JavaScript UDF? JavaScript UDF is Couchbase’s alternative to PL/SQL. JavaScript UDF brings JavaScript’s general-purpose scripting flexibility to databases, allowing for dynamic and powerful…

Spreadsheets have become an integral part of modern-day computing. They allow users to organize, manipulate, and analyze data in a tabular format. Applications like Google Sheets have set the standard for powerful, interactive spreadsheets. In this blog post, we will walk you through the process of building a spreadsheet application using JavaScript. We’ll focus on key programming concepts, explore JavaScript features, and include detailed code snippets with explanations. The entire source code is available here in my Codepen. What Is…

When you’ve been building web applications for over 25 years, as I have done, using HTML, CSS, and JavaScript has become second nature.  In this article, I’ll show you some simple ways to create scrolling text using these tools, including five different methods for coding scrolling text with plain HTML, HTML and CSS, and finally, HTML + CSS + JS. 1. Plain HTML Scrolling Text Simply add a tag around the text to create a scrolling effect. This tag offers…