https://nalar.dev/tags/structuredclone/ Recent content in StructuredClone on Nalar Hugo en-us Wed, 02 Sep 2026 00:00:00 +0700 https://nalar.dev/deep-cloning-in-javascript-with-structuredclone/ Wed, 02 Sep 2026 00:00:00 +0700 https://nalar.dev/deep-cloning-in-javascript-with-structuredclone/ <p>Copying JavaScript objects looks simple until values contain nested arrays, dates, maps, sets, typed arrays, or circular references. A shallow spread copies only the first level, while the old <code>JSON.stringify</code> and <code>JSON.parse</code> pattern changes or rejects several legitimate JavaScript values.</p> <p><code>structuredClone</code> provides a standard deep-cloning operation based on the structured clone algorithm used by browser messaging APIs.</p> <h2 id="shallow-copies-keep-nested-references">Shallow copies keep nested references</h2> <p>A spread expression creates a new outer object:</p>