SudoPlz SudoPlz - 7 months ago 884
Javascript Question

How can I use webpack with express?

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.

|
@ ../~/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


and this is my config file:

var webpack = require('webpack');


module.exports = {
// Makes sure errors in console map to the correct file
// and line number
devtool: 'eval',
entry: [
'./bin/www.js'
],
output: {
path: './bin/out',
filename: 'server.js'
},

extensions: [
'',
'.jsx', '.js'
],

module: {

loaders: [
// Compile es6 to js.
{
test: /app\/.*\.js?$/,
loaders: [
'react-hot',
'babel-loader'
]
}
]
},

devtool: 'source-map'
};


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

Answer

What I ended up doing was I used 2 different configurations, 1 for packing the server stuff together using webpack, and 1 for packing all the browser stuff together and also run webpack dev server for hot reloading.

Server webpack config aka webpack.node.config.js now looks like this:

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: [
                    // 'imports?document=this',

                    // 'react-hot',
                    'babel-loader'
                    //,'jsx-loader'
                ]
            },
            //{ test: /\.css$/,  loader: path.join(__dirname, 'server', 'style-collector') + '!css-loader' },
            { test:  /\.json$/, loader: 'json-loader' },


            //{ test: /\.ejs$/, loader: 'ejs-loader?variable=data' }
        ]
    },
    plugins: [
    // new webpack.NormalModuleReplacementPlugin("^(react-bootstrap-modal)$", "^(react)$")
    // new webpack.IgnorePlugin(new RegExp("^(react-bootstrap-modal)$"))
    // new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/)
  ]
};

Browser webpack config aka webpack.browser.config.js now looks like this:

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) {
        console.log('Node module: '+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('autoprefixer-core')
    ],

    devtool: 'source-map'
}
;
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