Secure JavaScript Coding: Identifying Vulnerabilities in Web Applications

Security is often an afterthought in web development, leaving applications vulnerable to exploits that target the unique quirks of JavaScript. Understanding how attackers exploit language features like closures, scopes, and prototype chains is essential for writing resilient code. In this course, you will transition from writing functional JavaScript to writing secure, resilient web applications. You will learn to think like a security auditor, analyzing code structure to spot hidden flaws before they can be exploited. What you'll learn: - Understand foundational JavaScript security concepts, including scope isolation and closure-based vulnerabilities. - Identify common web vulnerabilities such as Cross-Site Scripting (XSS), Injection, and Prototype Pollution. - Analyze JavaScript code patterns to find hidden security flaws and logic errors. - Apply secure coding practices to protect data integrity and manage user state safely. - Implement modern web security headers and browser-based defense mechanisms. The course begins with core security definitions and a deep dive into JavaScript's execution model. From there, you will progress through written code-analysis exercises, learning how to audit functions and secure your applications against modern web threats. This course is designed for beginner developers who want to build a security-first mindset, and no prior cybersecurity experience is required. Start reading today to build safer, more robust web applications.