深拷贝

function deepClone<T>(value: T): T {
	const cache = new WeakMap();

	function _deepClone(obj: any): any {
		if (typeof obj !== 'object' || obj === null) {
			return obj;
		}

		if (cache.has(obj)) {
			return cache.get(obj);
		}

		const result = Array.isArray(obj) ? [] : ({} as any);
		cache.set(obj, result);

		for (const key in obj) {
			result[key] = _deepClone(obj[key]);
		}

		return result;
	}

	return _deepClone(value);
}