Why JSON.parse(JSON.stringify()) Is Broken in Modern JavaScript скачать в хорошем качестве

Why JSON.parse(JSON.stringify()) Is Broken in Modern JavaScript

Most JavaScript developers have done this at least once: you want to clone an object without mutating the original, so you reach for JSON.parse(JSON.stringify()). It seems simple, it works for basic cases… until it silently breaks your data. Dates turn into strings, Maps disappear, undefined values vanish, and debugging becomes a nightmare. In this video, we fix that problem using modern JavaScript. You’ll learn why the classic JSON cloning trick was never designed for real JavaScript data and why it fails in production applications. Then we’ll introduce structuredClone(), a native JavaScript API built specifically for safe, reliable deep cloning. No libraries, no hacks, and no hidden data loss. We’ll walk through practical examples step by step, including deep cloning nested objects, preserving Date objects correctly, and cloning Maps without breaking their structure. You’ll also see why changes to a cloned object don’t affect the original, helping you avoid accidental mutations and subtle bugs. We’ll briefly cover the limitations of structuredClone() as well—what it intentionally does not clone, such as functions, DOM elements, or class instances with methods—and why those limitations actually make your code safer and more predictable. If you’re working with real-world JavaScript data and want a modern, reliable approach to deep cloning, this video will save you time and prevent hard-to-find bugs. 👍 If you found this helpful, like the video 💬 Comment with how you currently clone objects in JavaScript 🔔 Subscribe for more modern JavaScript tips and developer-friendly explanations