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How can I deep clone an object in JavaScript without using JSON methods? Pending Review
Asked on May 04, 2026
Answer
To deep clone an object in JavaScript without using JSON methods, you can use the structuredClone function, which is a modern and efficient way to create a deep copy of an object.
<!-- BEGIN COPY / PASTE -->
const original = {
name: "Alice",
details: {
age: 30,
hobbies: ["reading", "biking"]
}
};
const clone = structuredClone(original);
console.log(clone);
// Output: { name: "Alice", details: { age: 30, hobbies: ["reading", "biking"] } }
<!-- END COPY / PASTE -->Additional Comment:
✅ Answered with JavaScript best practices.- The structuredClone function is part of the modern JavaScript standard and is supported in most environments.
- It handles complex data types like arrays, objects, and even more complex structures like Maps and Sets.
- Unlike JSON methods, structuredClone can handle non-serializable data such as functions and symbols.
- Ensure your environment supports structuredClone, as it is a relatively new addition to JavaScript.
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