Introduction Regular expressions (regex) are a powerful tool for manipulating and validating text in software applications. However, certain regex patterns can be vulnerable to backtracking, which can cause super-linear runtime and potentially lead to a denial of service (DoS) attack. …

Introduction Access control lists (ACLs) are a method for managing access to resources in a system. It is a security mechanism used to regulate access to resources based on the identity of the user and their assigned privileges. ACLs are used in a wide range of systems, including operating systems, databases…

Introduction When writing JavaScript code, it’s important to consider the performance of the code you’re writing. One way to do this is to understand the time and space complexity of the built-in methods you’re using. This knowledge can help you optimize your code for speed and efficiency. What is Time and Space Complexity? Time complexity is a…

Introduction Image optimization is a crucial step in modern web development. As image files are often large, optimizing them can improve website performance by reducing page load times. …

Introduction Fetch API is a modern web API that provides a way to fetch resources asynchronously over the network. It has become a popular choice for fetching data and resources in web applications due to its simplicity, flexibility, and consistency. …

Introduction Some CSS properties are more costly than others in terms of performance. When used improperly, they can slow down your webpage and make it less responsive for your users. In this article, we’ll explore some of the most costly CSS properties and how to optimize them. Box-Shadow The box-shadow property is…

Introduction JavaScript is the most popular programming language for web development. In my opinion, developers must remain defensive in securing their JavaScript applications to keep the web safe. This post will go into common JavaScript vulnerabilities and how to fix them. DOM updates should not lead to cross-site scripting (XSS) attacks DOM-based cross-site scripting (XSS) occurs in a web application when…

Introduction Most of the regular expression engines use backtracking to try all possible execution paths of the regular expression when evaluating an input, in some cases it can cause performance issues, called catastrophic backtracking situations. In the worst case, the complexity of the regular expression is exponential in the size of…

Introduction HTML is fast and accessible by default, but in modern websites, users are expecting much more, they want the pages that they visit will be smooth, load quickly and smooth. There are many, many ways to make your websites faster, but in this article, I will focus on HTML. Because…