Question

运行npm run build时出现此错误：

ERROR in ./src/client.js 7:2
Module parse failed: Unexpected token (7:2)
File was processed with these loaders:
 * ./node_modules/jshint-loader/index.js
You may need an additional loader to handle the result of these loaders.
| 
| const component = (
>   <Router history={browserHistory}>
|     {routes}
|   </Router>
 @ multi babel-polyfill ./src/client.js main[1]

./ src / client.js （警告browserHistory-无法解析符号“ browserHistory”）

import React      from 'react';
import ReactDOM   from 'react-dom';
import { browserHistory, Router } from 'react-router';
import routes from './routes';

const component = (
  <Router history={browserHistory}>
    {routes}
  </Router>
);

ReactDOM.render(component, document.getElementById('react-view'));

我该如何解决？

反应：16.13.0

webpack：4.42.0

npm：6.14.2

webpack-config.js

global.Promise         = require('bluebird');
const webpack            = require('webpack');
const path               = require('path');

const plugins = [
  new webpack.DefinePlugin({
    'process.env': {
      BROWSER:  JSON.stringify(true),
      NODE_ENV: JSON.stringify(process.env.NODE_ENV || 'development')
    }
  })
];

module.exports = {
  entry: ['babel-polyfill', './src/client.js'],
  output: {
    filename: 'bundle.js',
    path: path.resolve(__dirname, 'dist')
  },

  module: {
    rules: [{
      test: /\.js$/, // include .js files
      enforce: "pre", // preload the jshint loader
      exclude: /node_modules/, // exclude any and all files in the node_modules folder
      use: [{
        loader: "jshint-loader",
        // more options in the optional jshint object
        options: {  // ⬅ formally jshint property
          camelcase: true,
          emitErrors: false,
          failOnHint: false
        }
      }]
    }]
  }
};

Answer 1

您的webpack配置不处理React的JSX语法。您需要使用一些装载程序对其进行更新才能正常工作（这里是教程：https://www.valentinog.com/blog/babel/）

我建议您首先使用create-react-app，它将所有这些配置抽象化：https://github.com/facebook/create-react-app。这样一来，您就可以更轻松地开始做出反应，并且可以在准备好/需要时对其进行自定义。

如何解决模块解析失败：意外的令牌？

1 个答案: