//深拷贝
export function deepClone(source) {
  if (source === null || typeof source !== 'object') {
    return source
  }
  
  const target = Array.isArray(source) ? [] : {}
  for (const key in source) {
    if (Object.prototype.hasOwnProperty.call(source, key)) {
      target[key] = deepClone(source[key])
    }
  }
  return target
}