Getting 'Module parse failed' using suggested config

Hi everyone,

I’m trying to use Cesium 1.31.0 in my React project using webpack but I keep getting the same error:

Project is running at http://localhost:8080/

webpack output is served from /

Content not from webpack is served from C:\projects\Web Network Analysis\public\src

Hash: 94a02afbd667b1bea74c

Version: webpack 2.2.1

Time: 3694ms

Asset Size Chunks Chunk Names

client.min.js 3.17 MB 0 [emitted] [big] main

chunk {0} client.min.js (main) 1.15 MB [entry] [rendered]

[10] ./~/react/react.js 56 bytes {0} [built]

[122] ./~/react-router/es/index.js 1.46 kB {0} [built]

[144] (webpack)/hot/emitter.js 77 bytes {0} [built]

[145] ./js/client.js 940 bytes {0} [built]

[146] (webpack)-dev-server/client?http://localhost:8080 5.28 kB {0} [built]

[147] (webpack)/hot/dev-server.js 1.57 kB {0} [built]

[150] ./js/pages/Layout.js 2.36 kB {0} [built]

[151] ./js/pages/MapPage.js 2.68 kB {0} [built]

[181] ./~/react-dom/index.js 59 bytes {0} [built]

[317] ./~/strip-ansi/index.js 161 bytes {0} [built]

[319] ./~/url/url.js 23.3 kB {0} [built]

[321] (webpack)-dev-server/client/overlay.js 3.6 kB {0} [built]

[322] (webpack)-dev-server/client/socket.js 856 bytes {0} [built]

[324] (webpack)/hot/log-apply-result.js 1.02 kB {0} [built]

[325] multi (webpack)-dev-server/client?http://localhost:8080 webpack/hot/dev-server …/js/client.js 52 bytes {0} [built]

  • 311 hidden modules

WARNING in ./~/cesium/index.js

11:35-42 Critical dependency: require function is used in a way in which dependencies cannot be statically extracted

ERROR in ./~/requirejs/bin/r.js

Module parse failed: C:\projects\Web Network Analysis\public\node_modules\requirejs\bin\r.js Unexpected character ‘#’ (1:0)

You may need an appropriate loader to handle this file type.

#!/usr/bin/env node


  • @license r.js 2.3.3 Copyright jQuery Foundation and other contributors.

@ ./~/cesium/index.js 5:16-36

@ ./js/pages/MapPage.js

@ ./js/client.js

@ multi (webpack)-dev-server/client?http://localhost:8080 webpack/hot/dev-server …/js/client.js

webpack: Failed to compile.

This is my webpack.config.js:

var debug = process.env.NODE_ENV !== “production”;

var webpack = require(‘webpack’);

var path = require(‘path’);

module.exports = {

context: path.join(__dirname, “src”),

devtool: debug ? “inline-sourcemap” : null,

entry: “…/js/client.js”,

module: {

unknownContextCritical: false,

//unknownContextRegExp: /^./.*$/,

loaders: [

{ test: /.css$/, loader: “style!css” },


test: /.(png|gif|jpg|jpeg)$/,

loader: ‘file-loader’



test: /.js?$/,

exclude: /(node_modules|bower_components)/,

loader: ‘babel-loader’,

query: {

presets: [‘react’, ‘es2015’, ‘stage-0’],

plugins: [‘react-html-attrs’, ‘transform-decorators-legacy’, ‘transform-class-properties’],





output: {

path: __dirname + “/src/”,

filename: “client.min.js”,

sourcePrefix : ‘’


plugins: debug ? : [

new webpack.optimize.DedupePlugin(),

new webpack.optimize.OccurenceOrderPlugin(),

new webpack.optimize.UglifyJsPlugin({ mangle: false, sourcemap: false }),

//new webpack.ContextReplacementPlugin(/moment-jdateformatparser/, /moment-jdateformatparser.js/),



I have implemented the fixes suggested in this post: but the error keeps occuring. I have also executed the steps under “I’ve already got webpack set up, just tell me how to use Cesium” in this link: still the error persists.

Does any of you know how to remedy this issue? Thanks in advance! :slight_smile:

Gotta say, that seems rather odd. Those exact two config edits definitely work for me. I’m actually working on a blog post that talks about using Cesium with Webpack, and the first part of the post will discuss taking a Create-React-App project, ejecting, and modifying those two values to let Cesium work okay.

Although… looking at your error messages, it’s complaining about /~/cesium/index.js and /~/requirejs/bin/r.js . That may be the issue. How are you actually importing Cesium files into your application code?

I wasn’t quite sure why it’s still giving me those errors but according to an answer on my question on StackOverflow it’s because:

the cesium npm package does not define an entry point – I believe that is the problem.

This is the fix that was proposed:

const Cesium = window.Cesium;

Even though I hoped to be able to use a regular import (import Cesium from “cesium”:wink: the issue was fixed by using the above so I’ll keep using it for the time being.

Ah. Yeah, if you’re doing 1import Cesium from "cesium"1, that probably won’t work directly. You need to import specific classes, like import Viewer from "cesium/Source/Widgets/Viewer".

I’ve almost got that blog post I mentioned ready, and hope to publish it Tuesday or Wednesday. I’ll post a link in this group when I publish it.

As promised, just published a 2-part post on “Declaratively Rendering Earth in 3D: Using Cesium with React and Webpack”. Part 1 covers basic Cesium+Webpack setup and build optimization with DllPlugin. Part 2 shows declarative React components that wrap imperative APIs:

Hope this helps!