How can I use webpack with express ?

Hello. When I try to use webpack with a simple express server I always get TONS of errors:
express.js

    'use strict';
    var express = require('express');
    var path = require('path');
    var url = require('url');


    // -------- my proxy----------------------
    var app = express();
    app.set('views', path.join(__dirname, 'views'));
    app.set('view engine', 'ejs');
    app.set('port', process.env.PORT || 8080);
    app.use(function logErrors(err, req, res, next) {
            console.error(err.stack);
            next(err);
        }
    );

    app.listen(app.get('port'), function() {
        console.info('Express server started at http://localhost:' + app.get('port'));
    });

I get all those errors:

    Version: webpack 1.10.0
    Time: 1200ms
      Asset    Size  Chunks             Chunk Names
    outfile  559 kB       0  [emitted]  main
    chunk    {0} outfile (main) 498 kB [rendered]
        [0] ../app/server/express2.js 553 bytes {0} [built]
         + 125 hidden modules

    WARNING in ../~/express/lib/view.js
    Critical dependencies:
    78:29-56 the request of a dependency is an expression
     @ ../~/express/lib/view.js 78:29-56

    ERROR in ../~/express/lib/request.js
    Module not found: Error: Cannot resolve module 'net' in /Users/Dynopia/Development/DS_Stalker_Frontend/node_modules/express/lib
     @ ../~/express/lib/request.js 18:11-25

    ERROR in ../~/express/lib/view.js
    Module not found: Error: Cannot resolve module 'fs' in /Users/Dynopia/Development/DS_Stalker_Frontend/node_modules/express/lib
     @ ../~/express/lib/view.js 18:9-22

    ERROR in ../~/express/~/send/index.js
    Module not found: Error: Cannot resolve module 'fs' in /Users/Dynopia/Development/DS_Stalker_Frontend/node_modules/express/node_modules/send
     @ ../~/express/~/send/index.js 25:9-22

    ERROR in ../~/express/~/etag/index.js
    Module not found: Error: Cannot resolve module 'fs' in /Users/Dynopia/Development/DS_Stalker_Frontend/node_modules/express/node_modules/etag
     @ ../~/express/~/etag/index.js 22:12-25

    ERROR in ../~/express/~/send/~/destroy/index.js
    Module not found: Error: Cannot resolve module 'fs' in /Users/Dynopia/Development/DS_Stalker_Frontend/node_modules/express/node_modules/send/node_modules/destroy
     @ ../~/express/~/send/~/destroy/index.js 1:17-30

    ERROR in ../~/express/~/send/~/mime/mime.js
    Module not found: Error: Cannot resolve module 'fs' in /Users/Dynopia/Development/DS_Stalker_Frontend/node_modules/express/node_modules/send/node_modules/mime
     @ ../~/express/~/send/~/mime/mime.js 2:9-22

    ERROR in ../~/express/~/send/~/statuses/codes.json
    Module parse failed: /Users/Dynopia/Development/DS_Stalker_Frontend/node_modules/express/node_modules/send/node_modules/statuses/codes.json Line 2: Unexpected token :
    You may need an appropriate loader to handle this file type.
    | {
    |   "100": "Continue",
    |   "101": "Switching Protocols",
    |   "102": "Processing",
     @ ../~/express/~/send/~/statuses/index.js 2:12-35

    ERROR in ../~/express/~/send/~/mime/types.json
    Module parse failed: /Users/Dynopia/Development/DS_Stalker_Frontend/node_modules/express/node_modules/send/node_modules/mime/types.json Line 1: Unexpected token :
    You may need an appropriate loader to handle this file type.
    | 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    |
     @ ../~/express/~/send/~/mime/mime.js 87:12-35

    ERROR in ../~/express/~/accepts/~/mime-types/~/mime-db/db.json
    Module parse failed: /Users/Dynopia/Development/DS_Stalker_Frontend/node_modules/express/node_modules/accepts/node_modules/mime-types/node_modules/mime-db/db.json Line 2: Unexpected token :
    You may need an appropriate loader to handle this file type.
    | {
    |   "application/1d-interleaved-parityfec": {
    |     "source": "iana"
    |   },
     @ ../~/express/~/accepts/~/mime-types/~/mime-db/index.js 11:17-37

    ERROR in ../~/express/~/type-is/~/mime-types/~/mime-db/db.json
    Module parse failed: /Users/Dynopia/Development/DS_Stalker_Frontend/node_modules/express/node_modules/type-is/node_modules/mime-types/node_modules/mime-db/db.json Line 2: Unexpected token :
    You may need an appropriate loader to handle this file type.
    | {
    |   "application/1d-interleaved-parityfec": {
    |     "source": "iana"
    |   },
     @ ../~/express/~/type-is/~/mime-types/~/mime-db/index.js 11:17-37

What can I do, I need to use webpack on my server side as well.

I run the express.js file like so:
./node_modules/webpack/bin/webpack.js ../app/server/express.js outfile --display-chunks -c --progress -d

Author: Fantashit

1 thought on “How can I use webpack with express ?

  1. Ok what I ended up doing was, I got 1 client build and 1 server. In the server build all I do is ES6 > Webpack> Output to a js file > nodemon. On the client build I do ES6 > webpack+webpack dev server (through the console) and run both of those tasks with npm scripts.

    My server entry point now looks like this:

    app/server/serverEntryPrototype.js

        'use strict';
        var express = require('express');
        var path = require('path');
        var logger = require('morgan');
        var bodyParser = require('body-parser');
        var configFile = require('../config.json');
        var proxy = require('proxy-middleware');
        var url = require('url');
        var morgan = require('morgan');
        var bodyParser = require('body-parser');
        var favicon = require('serve-favicon');
    
        var isProduction = process.env.NODE_ENV === 'production';
        //var publicPath = path.join(__dirname, '..','..', 'assets');
    
        // -------- my proxy----------------------
        var app = express();
        // proxy the request for static assets
    
        // now requests to '/assets' are proxied to 'http://localhost:8081/assets'
        app.use('/assets', proxy(url.parse('http://localhost:8081/assets')));
    
    
        app.use(favicon(path.join('assets', 'favicon.ico')));
    
    
    
        app.use(function logErrors(err, req, res, next) {
                console.error(err.stack);
                next(err);
            }
        );
    
        //css folder
        app.use('/styles', express.static(path.join('app', 'styles')));
        //app.set('styles', express.static(path.join('app', 'styles')));
        //app.engine('.ejs', require('ejs').__express);
        //app.set('views', 'bin');
        app.set('views', path.join('app', 'server', 'views'));
        app.set('view engine', 'ejs');
    
        var PORT = (isProduction ? process.env.PORT: configFile.DEV_PORT);
        app.set('port', process.env.PORT || configFile.DEV_PORT);
    
    
    
        //app.use(morgan('dev'));
        //app.use(bodyParser.json());
        app.use(require('marty-express')({
            routes: require('../routes'),
            application: require('../application'),
            rendered: function (result) {
                console.log('Rendered ' + result.req.url);
            }
        }));
    
    
        var server = app.listen(app.get('port'), function() {
            console.info('Express server started at http://localhost:' + app.get('port'));
        });

    My npm scripts inside package.json are:
    package.json

     "scripts": {
        "start": "parallelshell 'npm run webpack-node' 'npm run webpack-server-browser' 'npm run nodemon'",
        "nodemon":"sleep 13;nodemon bin/serverEntryPoint.js",
        "webpack-server-browser":"./node_modules/webpack-dev-server/bin/webpack-dev-server.js --config ./webpack.browser.config.js --hot --port 8081",
        "webpack-node":"./node_modules/webpack/bin/webpack.js --config ./webpack.node.config.js --progress --watch",
    
        "lint":"eslint app/ -c .eslintrc"
      }
    

    and I start everything by running npm start in my console.
    ps. I forgot to mention I’ve got 2 webpack config files now:

    Webpack browser config

    var webpack = require('webpack');
    var path = require('path');
    var buildPath = path.resolve(__dirname, 'assets');
    var fs = require('fs');
    
    
    var commonLoaders = [
        { test: /\.js$/,
    
            loaders: [
                'react-hot',
                'babel-loader'
                //,'jsx-loader'
            ]
        }
    ];
    
    
    var nodeModules = {};
    fs.readdirSync('node_modules')
        .filter(function(x) {
            return ['.bin'].indexOf(x) === -1;
        })
        .forEach(function(mod) {
            nodeModules[mod] = 'commonjs ' + mod;
        });
    
    module.exports =
    {
        // Makes sure errors in console map to the correct file
        // and line number
        name: 'browser',
        devtool: 'eval',
        entry: [
            //'./bin/www.js',
            './app/index.js',
            'webpack/hot/dev-server',
            'webpack-dev-server/client?http://localhost:8081'  // WebpackDevServer host and port
        ],
        output: {
            path: buildPath,
            filename: '[name].js',
            // Everything related to Webpack should go through a build path,
            // localhost:3000/build. That makes proxying easier to handle
            publicPath: 'http://localhost:8081/assets/'
        },
    
        extensions: [
            '',
            '.jsx', '.js',
            '.json',
            '.html',
            '.css', '.styl', '.scss', '.sass'
        ],
        //node: {
        //    fs: 'empty',
        //    net: 'empty'
        //},
        //
        //'browser': {
        //    './app/server/serverEntryPrototype.js':false,
        //    'body-parser':false,
        //    'ejs':false,
        //    'proxy-middleware':false,
        //    'morgan':false,
        //    'express': false,
        //    'marty-express': false
        //},
    
        module: {
    
            loaders: [
                // Compile es6 to js.
                {
                    test: /app\/.*\.jsx?$/,
                    loaders: [
                        'react-hot',
                        'babel-loader'
                    ]
                },
    
                ///app\/.*\.json$/
                { test:  /\.json$/, loader: 'json-loader' },
    
                // Styles
                { test: /\.css$/, loader: 'style-loader!css-loader' },
                { test: /\.s(a|c)ss$/, loader: 'style!css?localIdentName=[path][name]---[local]---[hash:base64:5]!postcss!sass' },
    
                // Fonts
                { test: /\.woff(2)?(\?v=[0-9]\.[0-9]\.[0-9])?$/, loader: 'url-loader?limit=10000&minetype=application/font-woff' },
                { test: /\.(ttf|eot|svg)(\?v=[0-9]\.[0-9]\.[0-9])?$/, loader: 'file-loader' }
    
                //{ test: /\.png$/, loader: 'url-loader?limit=100000' },
                //{ test: /\.jpg$/, loader: 'file-loader' }
            ],
    
            plugins: [
                new webpack.HotModuleReplacementPlugin(),
                new webpack.NoErrorsPlugin()
            ]
        },
    
        postcss: [
            require('postcss-local-scope'),
            require('autoprefixer-core')
        ],
    
        devtool: 'source-map'
    }
    

    Webpack server config

    var webpack = require('webpack');
    var path = require('path');
    var fs = require('fs');
    
    
    
    
    var nodeModules = {};
    fs.readdirSync('node_modules')
        .filter(function(x) {
            return ['.bin'].indexOf(x) === -1;
        })
        .forEach(function(mod) {
            nodeModules[mod] = 'commonjs ' + mod;
        });
    
    //console.log('Node Modules: '+ JSON.stringify(nodeModules));
    module.exports =
    
    {
        // The configuration for the server-side rendering
        name: 'server',
        target: 'node',
        entry: './app/server/serverEntryPrototype.js',
        output: {
            path: './bin/',
            publicPath: 'bin/',
            filename: 'serverEntryPoint.js'
        },
        externals: nodeModules,
        module: {
            loaders: [
                { test: /\.js$/,
    
                    loaders: [
                        'react-hot',
                        'babel-loader'
                        //,'jsx-loader'
                    ]
                },
                //{ test: /\.css$/,  loader: path.join(__dirname, 'server', 'style-collector') + '!css-loader' },
                { test:  /\.json$/, loader: 'json-loader' }
                //{ test: /\.ejs$/, loader: 'ejs-loader?variable=data' }
            ]
        }
    };
    

    All works well for me now.

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