未捕获（承诺中）TypeError：将循环结构转换为 JSON

Posted 2023-02-22

【中文标题】未捕获（承诺中）TypeError：将循环结构转换为 JSON

【英文标题】：Uncaught (in promise) TypeError: Converting circular structure to JSON

【发布时间】：2021-01-12 23:03:03

【问题描述】：

我在这里收到以下错误

  body: JSON.stringify(
  name,
  expiresAfterSeconds
)

TypeError：将循环结构转换为 JSON --> 从具有构造函数 'FiberNode' 的对象开始

问题似乎是循环结构无法使用 JSON stringify 进行转换。但是，我似乎无法找到使用圆形结构的地方。我在这里遗漏了什么吗？

循环结构示例： 变量 a = ; a.b = a;

fetchItems

async function fetchItems(name, expiresAfterSeconds) 
  const newItemData = 
    method: 'POST',
    headers:  'Content-Type': 'application/json' ,
    body: JSON.stringify(
      name,
      expiresAfterSeconds
    )
  ;
  const response = await fetch('/api/add-item', newItemData)
    .then(response => response.json())
    .then(data => console.log(data));

newItemForm()

const NewItemForm = () => 
  const [itemData, setItemData] = React.useState(
    name: '',
    expiresAfterSeconds: ''
  );
  const handleSubmit = (e) => 
    e.preventDefault();
    fetchItems(itemData.name, itemData.expiresAfterSeconds)
  
  return (
    <form onSubmit=handleSubmit>
      <div className="form-row">
        <div className="form-group col-md-8">
          <label htmlFor="formItemName">Item name</label>
          <input
            type="text"
            className="form-control"
            id="formItemName"
            aria-describedby="itemNameHelp"
            placeholder="yummy food"
            value=itemData.name
            onChange=(e) =>  setItemData( ...itemData, name: e.target.value ) 
          />
          <small id="itemNameHelp" className="form-text text-muted">
            We don't want more than one piece of the same food in our fridge.
        </small>
        </div>
      </div>
      <div className="form-row">
        <div className="form-group col-sm-3">
          <label htmlFor="formExpiresAfterSeconds">Expires after</label>
          <div className="input-group">
            <input
              type="text"
              className="form-control"
              id="formExpiresAfterSeconds"
              aria-label="Expires in"
              aria-describedby="basic-addon2"
              value=itemData.expiresAfterSeconds
              onChange=(e) =>  setItemData( ...itemData, expiresAfterSeconds: e.target.value ) 
            />
            <div className="input-group-append">
              <span className="input-group-text" id="basic-addon2">
                seconds
            </span>
            </div>
          </div>
        </div>
      </div>
      <button type="submit" className="btn btn-primary" onClick=fetchItems>
        Submit
    </button>
    </form>
  )
;

编辑 - 完全错误

TypeError: Converting circular structure to JSON
    --> starting at object with constructor 'FiberNode'
    |     property 'stateNode' -> object with constructor 'HTMLButtonElement'
    --- property '__reactInternalInstance$xcvrnuhmmp' closes the circle

【参考方案1】：

试试

body: JSON.stringify(
  name : name,
  expiresAfterSeconds : expiresAfterSeconds
)