中文
devexamples

Deep Clone Plain Data Objects

Clone nested objects and arrays without sharing references, using the structured clone algorithm so dates, maps, and cycles are handled correctly.

JavascriptData Integrity

Code

snippet
export function deepClone(value) {
  if (typeof structuredClone === "function") {
    return structuredClone(value);
  }
  if (value === null || typeof value !== "object") return value;
  if (Array.isArray(value)) return value.map((item) => deepClone(item));
  if (value instanceof Date) return new Date(value.getTime());
  const output = {};
  for (const key of Object.keys(value)) {
    output[key] = deepClone(value[key]);
  }
  return output;
}

Related Examples