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Copy-ready answers to everyday coding questions, each with a short explanation. Laravel, PHP, JavaScript, SQL, Bash and more.

1 snippet tagged #structuredClone · Show all

JavaScript October 8, 2026 Deep clone objects in JavaScript with structuredClone() Makes a true deep copy and keeps Date, Set and Map. It avoids the JSON.parse(JSON.stringify()) hack, which turns Dates into strings and drops Sets. Needs Node 1... const orig = { user: { name: "Ada", tags: ["a"] }, when: new Date(0), ids: new Set([1, 2]) }; const copy = structuredClone(orig); copy.user.tags.push("b"); console.log(orig.user.tags, copy.user.tags);

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