In the react project, you sometimes see the following errors:

Error: A cross-origin error was thrown. React doesn’t have access to the actual error object in development. See https://fb.me/react-crossorigin-error for more information.

In case of such an error message, first check whether you have such a code: JSON. Parse (xxx), which is mostly caused by this problem.

The corresponding processing method can use try catch to catch exceptions

     try {
        // You can interrupt the point to see that the execution has reported an error when you get here
        let copyObj = JSON.parse(obj)
        if (copyObj === null) {
          return <span>-</span>
        } else {
          let str = ''
          Object.keys(copyObj).forEach(
            key => (str += key + ': ' + copyObj[key] + ',')
          )
          return str.slice(0, -1)
        }
      } catch (e) {
        message.error('xxxx Parsing error')
        return obj
      }