Creating complete copies of nested objects is a common requirement when working with complex data structures in JavaScript applications. As the creator of CoreUI, a widely used open-source UI library, and with over 25 years of experience in software development, I’ve encountered this challenge countless times when managing component state and configuration objects. The most modern and reliable solution is using the structuredClone() method, which creates true deep copies of objects. This method handles nested objects, arrays, and most data types correctly.