SOURCE

function deepClone(obj, regex, hash = new WeakMap()) {
    if (Object(obj) !== obj) return typeof obj === 'number' ? 0 : ''; // primitives
    if (obj instanceof Set) return new Set(obj); // See note about this!
    if (hash.has(obj)) return hash.get(obj); // cyclic reference
    const result = obj instanceof Date ? new Date(obj)
                 : obj instanceof RegExp ? new RegExp(obj.source, obj.flags)
                 : obj.constructor ? new obj.constructor() 
                 : Object.create(null);
    hash.set(obj, result);
    if (obj instanceof Map)
        Array.from(obj, ([key, val]) => result.set(key, deepClone(val, hash)) );
    return Object.assign(result, ...Object.keys(obj).filter(key => !regex.test(key)).map (
        key => ({ [key]: deepClone(obj[key], regex, hash) }) ));
}




var p = {
  data: 1,
  children: [{
    data: 2,
    parent: null
  }]
};

var q = deepClone(p,/^\w+(default|list)$/i);

console.log(JSON.stringify(q)); // 1

<div>
  <div style='font-weight:bold'>表单数据异常：</div>
  <ol style='margin-top:0px'>
  <li>请检查申请人、单位、归属部门是否填写！</li>
  <li>请确认单位对应扩展属性:“对应法人公司”是否配置！</li>
  <li>请确认归属部门对应扩展属性:“审批层级”是否配置！</li>
  <li>请检查借款金额是否填写！</li>
  </ol> 
</div>