Why 'structuredClone()' Is Breaking in JavaScript (And the Right Way to Deep Copy Objects)

📰 Dev.to · Emily Scott

Learn how to fix the 'structuredClone()' error in JavaScript and properly deep copy objects

intermediate Published 22 Apr 2026
Action Steps
  1. Identify the 'structuredClone()' function in your code and assess its usage
  2. Replace 'structuredClone()' with a supported alternative, such as JSON.parse(JSON.stringify(obj)) or a library like Lodash
  3. Test the new implementation to ensure it correctly deep copies objects without errors
  4. Consider using a polyfill for 'structuredClone()' if support for older browsers is necessary
  5. Verify the compatibility of the chosen solution with your project's requirements and browser support
Who Needs to Know This

JavaScript developers and engineers working on modern projects will benefit from understanding the solution to this common error, as it affects their ability to deep copy objects efficiently

Key Insight

💡 The 'structuredClone()' function is not supported in all browsers, leading to a ReferenceError, and should be replaced with a compatible alternative for deep copying objects

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🚨 Fix the 'structuredClone()' error in JavaScript! Learn the right way to deep copy objects 📚

Key Takeaways

Learn how to fix the 'structuredClone()' error in JavaScript and properly deep copy objects

Full Article

A fresh problem many JavaScript developers are facing in modern projects is this: ReferenceError:...
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