_react.default.createContext 不是使用 react-redux 时的函数

Question

我在入口点添加组件时出现问题，这里立即弹出这个错误，如何解决？我也尝试只添加主组件，但无论如何我都会犯这个错误，在 main.jsx 中，只有带有渲染方法的类返回“hello world”

 _react.default.createContext is not a function

 // App.jsx

import React from 'react';
import { render } from 'react-dom';
import { Provider } from 'react-redux';
import { BrowserRouter } from 'react-router-dom';

import 'react-select/dist/react-select.css';

import configureStore from './Data/store/configureStore';
import Main from "./Templates/Main/Main";

const store = configureStore();
render(
    <div>
        <Provider store={store}>
            <BrowserRouter>
                <Main/>
            </BrowserRouter>
        </Provider>
    </div>,
    document.getElementById('app-root')
);

Webpack 配置

'use strict';

var path = require('path');
var webpack = require('webpack');
var HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {
  devtool: 'eval-source-map',
  entry: [
    'webpack-hot-middleware/client?reload=true',
    path.join(__dirname, 'src/app.jsx')
  ],
  resolve: {
    root: [
      path.resolve(__dirname, "src"),
    ],
    extensions: ['', '.js', '.jsx', '.css']
  },
  output: {
    path: path.join(__dirname, '/public/'),
    filename: '[name].js',
    publicPath: '/'
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: 'src/index.tpl.html',
      inject: 'body',
      filename: 'index.html'
    }),
    new webpack.optimize.OccurenceOrderPlugin(),
    new webpack.HotModuleReplacementPlugin(),
    new webpack.NoErrorsPlugin(),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('development')
    })
  ],
  module: {
    loaders: [{
      test: /\.jsx?$/,
      exclude: /node_modules/,
      loader: 'babel',
      query: {
        presets: ['es2015', 'react']
      }
    }, {
      test: /\.css$/,
      loader: 'style!css'
    }]
  }
};

和依赖

    "react": "^15.6.2",
    "react-addons-update": "^15.6.2",
    "react-bootstrap": "^1.0.0-beta.5",
    "react-dom": "^15.6.2",
    "react-helmet": "^5.2.0",
    "react-redux": "^6.0.0",
    "react-router": "^4.3.1",
    "react-router-dom": "^4.3.1",
    "react-select": "^1.0.0-beta13",
    "redux": "^4.0.1",
    "redux-thunk": "^2.3.0",
    "sequelize": "^3.20.0",
    "sqlite3": "^4.0.6"

谷歌建议升级到 ract 16 版，但我不认为这是旧版本的问题。

原文由 Drop 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

react-redux v6.0.0 uses the new context api provided by React and in order for it work, either you need to downgrade react-redux to v5.x.x or upgrade react 和 react-dom 到 v16.4 或以上

如果您使用的是纱线，则可以运行

yarn upgrade react react-dom

否则使用 npm 你可以运行

npm update react react-dom

您也可以在 package.json 中手动更改版本并运行 yarn install 或 npm install

原文由 Shubham Khatri 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 2

通过更新 react 和 react-dom 解决了问题

npm update react react-dom

当然，关闭服务器并通过 npm start 重新启动。

原文由 Kamesh Kumar Singh 发布，翻译遵循 CC BY-SA 4.0 许可协议