deepClone class with typescript

deepClone.ts

export function deepClone<T>(obj: any): T {
    if (obj === null || typeof (obj) !== 'object' || 'isActiveClone' in obj) {
        return obj;
    }

    const clone = obj instanceof Date ? new Date(obj) : new obj.constructor();

    for (const key in obj) {
        if (Object.prototype.hasOwnProperty.call(obj, key)) {
            obj.isActiveClone = null;
            clone[key] = deepClone(obj[key]);
            delete obj.isActiveClone;
        }
    }

    return clone;
}