React錯誤收集

1.  Uncaught Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in, or you might have mixed up default and named imports

這個錯誤，最常見的問題是import組件出錯。例如，

import { com } from 't-com'  
//寫成了  
import com from 't-com'

或者

import com from 't-com'  
//寫成了  
import { com } from 't-com'

 2. JSON.parse()報錯 Unexpected token o in JSON at position 1

錯誤原因

1. 后端返回數據類型錯誤，前端解析報錯，查看接口返回數據來排除

2. 本地存儲中存在非法字符，使用隱身模式chrome窗口來排除

3. JSON.parse將一個非法的值或已經是Object的值二次parse