webpack-dev-server,historyApiFallback不起作用(webpack-4,react-router-4)

时间:2018-11-20 06:58:24

标签: webpack react-router webpack-dev-server

我正在使用webpack4测试出react-router4,但无法获得webpack-dev-server的设置:

{historyApiFallback: true}

上班。这种用法在webpack3中工作得很好,所以我不确定是什么问题...这是我的webpack.config.js:

const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = () => {
  return {
    mode: 'development',
    devtool: 'source-map',
    devServer: {
      port: 8888,
      historyApiFallback: true,
      stats: 'minimal'
    },
    resolve: {
      extensions: ['*', '.mjs', '.js', '.jsx']
    },
    module: {
      rules: [
        {
          test: /\.m?jsx?$/,
          exclude: /(node_modules)/,
          use: {
            loader: 'babel-loader'
          }
        }
      ]
    },
    plugins: [
      new HtmlWebpackPlugin({
        title:'React Lab',
        template: 'src/index.html'
      })
    ]
  }
}

这是我带有react-router4的简单React应用:

import React from 'react';
import ReactDOM  from 'react-dom';
import {
  BrowserRouter as Router,
  Route,
  Link,
  Switch
} from 'react-router-dom';

const mountNode = document.getElementById('app');

const App = () => (
  <Router>
    <div>

      <ul>
        <li><Link to="/">Link to: /</Link></li>
        <li><Link to="/page1">Link to: /page1</Link></li>
        <li><Link to="/page2">Link to: /page2</Link></li>
        <li><Link to="/does/not/exist">Link to: /does/not/exist</Link></li>
      </ul>
      <button onClick={()=>{location.reload();}}>reload page</button>

      <Switch>
        <Route exact path="/"      component={()=>(<h2>home</h2>)} />
        <Route exact path="/page1" component={()=>(<h2>page1</h2>)} />
        <Route exact path="/page2" component={()=>(<h2>page2</h2>)} />
        <Route                     component={()=>(<h2>no match</h2>)} />
      </Switch>

      <Route path="/" component={(props) =><div>{`props.location.pathname: ${props.location.pathname}`}</div>} />

    </div>
  </Router>
);

ReactDOM.render( <App/>, mountNode

导航到:

<Link to="/does/not/exist" /> 

然后单击

<button>reload page</button>

webpack开发服务器无法重定向到main.js

这是github上的完整代码: https://github.com/ApolloTang/webpack-dev-server-history-api-fall-back-not-working

任何帮助或评论将不胜感激。

2 个答案:

答案 0 :(得分:1)

事实证明,我在webpack.config.js中缺少output.publicPath:

output: {
  //  must specified output.publicPath otherwise
  //  devServer.historyApiFallback will not work
  publicPath: '/'
},

上面指定了output.publicPath,historyApiFallback可以工作。

我不记得我在哪里读到了output.publicPath在webpack4的配置中是可选的,但是它确实需要与webpack-dev-server一起使用。

https://webpack.js.org/configuration/output/#output-publicpath上的文档说:

  

webpack-dev-server还会从publicPath中获取提示,并使用它来   确定从何处提供输出文件。

但是我不知道这与hisitoryApiFallback有什么关系。

答案 1 :(得分:0)

似乎您的output.publicPath必须与devServer.historyApiFallback.index匹配。

我想知道为什么没有自动暗示,除非另有说明,否则DevServer以相同的方式重用output.publicPath