javascript / intermediate
Snippet
Deep Cloning with structuredClone
The structuredClone() method provides a native way to create deep copies of JavaScript objects. Unlike JSON.parse(JSON.stringify()), it correctly handles nested objects, arrays, and complex types like Date, Map, or Set.
snippet.js
javascript
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const original = { id: 1, meta: { created: new Date() } };const copy = structuredClone(original);console.log(copy !== original); // trueconsole.log(copy.meta.created instanceof Date); // true
nodejs
Breakdown
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const copy = structuredClone(original);
Creates a complete, independent deep copy of the original object.
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copy.meta.created instanceof Date
Verifies that the Date object was preserved as a Date type and not converted to a string.