This question explores JavaScript and addresses practical considerations related to: How do you deep clone an object in JavaScript without using JSON methods?

To deep clone an object in JavaScript without using JSON methods, you can use structured cloning via the structuredClone function, which is a modern and safe way to perform deep cloning. const originalObject = { name: "John", age: 30, details: { hobbies: ["reading", "gaming"], address: { city: "New York", zip: "10001" } } }; const clonedObject = structuredClone(originalObject); console.log(clonedObject); // Output: { name: "John", age: 30, details: { hobbies: ["reading", "gaming"], address: { city: "New York", zip: "10001" } } } ADDITIONAL COMMENT: - The structuredClone function is part of the modern JavaScript standard and is supported in most modern browsers. - It handles various data types, including objects, arrays, and more complex structures like Maps and Sets. - This method is preferred over JSON methods as it can clone objects with non-serializable properties like functions and symbols. - Always ensure your environment supports structuredClone, as it's a relatively new addition to JavaScript. ✅

How do you deep clone an object in JavaScript without using JSON methods?

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How do you deep clone an object in JavaScript without using JSON methods?

Asked on Feb 24, 2026

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To deep clone an object in JavaScript without using JSON methods, you can use structured cloning via the structuredClone function, which is a modern and safe way to perform deep cloning.

<!-- BEGIN COPY / PASTE -->
        const originalObject = {
            name: "John",
            age: 30,
            details: {
                hobbies: ["reading", "gaming"],
                address: {
                    city: "New York",
                    zip: "10001"
                }
            }
        };

        const clonedObject = structuredClone(originalObject);

        console.log(clonedObject);
        // Output: { name: "John", age: 30, details: { hobbies: ["reading", "gaming"], address: { city: "New York", zip: "10001" } } }
        <!-- END COPY / PASTE -->

Additional Comment:

The structuredClone function is part of the modern JavaScript standard and is supported in most modern browsers.
It handles various data types, including objects, arrays, and more complex structures like Maps and Sets.
This method is preferred over JSON methods as it can clone objects with non-serializable properties like functions and symbols.
Always ensure your environment supports structuredClone, as it's a relatively new addition to JavaScript.

✅ Answered with JavaScript best practices.

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How do you deep clone an object in JavaScript without using JSON methods?

Asked on Feb 24, 2026

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