deepClone.ts

/**
 * Clone value deeply, ignore custom classes, symbols and functions
 * @param value
 * @return cloneOfValue
 */
export function deepClone<T>(value: T): T {
  if (typeof value !== 'object' || !value) {
    return value;
  }

  switch (value.constructor) {
    case Array:
      return (value as Array<T>).map(deepClone) as T;
    case Object: {
      const clone = {} as T;
      const keys = Object.keys(value);
      for (let i = 0; i < keys.length; i++) {
        const key = keys[i] as keyof T;
        clone[key] = deepClone(value[key]);
      }
      return clone;
    }
    default:
      return value;
  }
}