Question

我正在尝试将redux集成到现有的反应应用程序中。我的所有反应代码都在jsx文件中。现在我介绍redux和store.js。在编译webpack错误时，对store.js上的一个应用的令牌错误

webpack.config.js

var webpack = require('webpack');
var path = require('path');

var BUILD_DIR = path.resolve(__dirname, 'project/static/public/js');
var APP_DIR = path.resolve(__dirname, 'project/static/public/js/components');


module.exports = {
  entry: APP_DIR + '/App.jsx',
  output: {
    path: BUILD_DIR,
    filename: 'bundle.js'
  },
  resolve: {
    alias: {
      'react': path.join(__dirname, 'node_modules', 'react')
    }
  },
  module : {
    loaders : [
      {
        test : /\.jsx/,
        include : APP_DIR,
        loader : 'babel',
        presets : ['es2015']
      },
      {
        test : /\.js/,
        include : BUILD_DIR,
        exclude : /bundle.js||bundle.js.map||node_modules/,
        loader : 'babel',
        presets : ['es2015']
      }
    ]
  },
  watchOptions: {
    poll: true
  }

};

.babelrc

{
  "presets": [
    "es2015",
    "react"
  ],
  "env": {
    "start": {
      "presets": [
        "react-hmre"
      ]
    }
  },
  "plugins": [
      ["transform-es2015-arrow-functions", { "spec": true }],
      ["transform-class-properties"]
    ]
}

store.js

import { applyMiddleware, createStore} from 'redux';
import combineReducers from './reducers/index.js'


export default createStore(combineReducers)

错误消息

   ./project/static/public/js/store.js中的错误   模块解析失败：/home/username/git/project/project/static/public/js/store.js第1行：

意外的令牌   您可能需要适当的加载程序来处理此文件类型。   |从'redux'导入{applyMiddleware，createStore};   |从'./reducers/index.js'导入combineReducers   |    @ ./project/static/public/js/components/App.jsx 15：13-32

这些文件在尝试解决并更好地理解redux时经历了多次迭代。我认为问题在于我的webpack配置。

Answer 1

您正在使用哪个版本的Babel？我想您需要在webpack规则中使用babel-loader。此配置可以在Babel 7和Webpack 4上正常工作。

WEBPACK规则：

      {
        test: /\.js$/,
        include : BUILD_DIR,
        exclude : /bundle.js||bundle.js.map||node_modules/,
        use: {
          loader: 'babel-loader',
        },
      },

.babelrc文件示例：

{
  "presets": [[
    "@babel/preset-env", {
      "useBuiltIns": "entry"
    }],
    "@babel/preset-react"],
  "plugins": [
    "@babel/plugin-proposal-class-properties",
    "@babel/plugin-proposal-export-default-from",
    "react-hot-loader/babel"
  ]
}

请记住，您需要至少安装babel-loader版本8.0.0，babel core 7.0.0和webpack 4.23。

但是，我很确定问题是您需要在webpack中使用babel-loader插件。访问https://github.com/babel/babel-loader

最好！

尝试将redux集成到反应应用程序中。 Webpack在store.js

1 个答案: