javascript - React V16.7 TypeError : Object(. ..) 不是一个函数

Question

  import React, { useContext } from 'react';
  useContext is undefined.

错误详细信息:

  Uncaught (in promise) TypeError: Object(...) is not a function

处理时出错

   const context = useContext(UserContext);

当前的 react 版本:

   "react": "^16.7",
  "react-dom": "^16.7",

Answer 1

要解决此问题，请将react和react-dom降级到16.7.0-alpha.2，因为v16.7中没有钩子(Hook)

    "react": "16.7.0-alpha.2",
    "react-dom": "16.7.0-alpha.2"