Parit Parit - 1 year ago 145
Javascript Question

Simple Webpack + React + ES6 + babel example doesn't work. Unexpected token error

am getting a parsing error while running webpack to compile the jsx syntax. Would appreciate if someone could point me to the error. I see a similar question asked Webpack, React, JSX, Babel - Unexpected token < but the solution suggested there doesn't work for me.

This is how my config files look like:


"name": "dropdowns",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
"dependencies": {
"react": "^15.2.1",
"react-dom": "^15.2.1",
"babel-core": "^6.11.4",
"babel-loader": "^6.2.4",
"babel-preset-es2015": "^6.9.0",
"babel-preset-react": "^6.11.1"
"devDependencies": {
"webpack": "^1.13.1",
"webpack-dev-server": "^1.14.1"
"author": "",
"license": "ISC"

my webpack.config.js file is

module.exports = {
context: __dirname + "/app",
entry: "./main.js",

output: {
filename: "bundle.js",
path: __dirname + "/dist"
module: {
loaders: [
test: /\.js$/,
exclude: /node_modules/,
loader: 'babel-loader',
query: {
presets: ['es2015', 'react']


In a local app folder I have main.js and IdMappingOptions.js as follows:

// in IdMappingOptions.js
import React from 'react';
class IdMappingOptions extends React.Component {
render () {
return <span>Hello!</span>
export default IdMappingOptions;
// in main.js
import React from 'react';
import { render } from 'react-dom';
import IdMappingOptions from './IdMappingOptions';

<IdMappingOptions/>, document.body

when running node_modules/.bin/webpack I get the following error trace:

Hash: 396f0bfb9d565b6f60f0
Version: webpack 1.13.1
Time: 37ms
[0] ./main.js 0 bytes [built] [failed]
ERROR in ./main.js
Module parse failed: /scratch/parallel/repository/dropdowns/app/main.js Unexpected token (6:4)
You may need an appropriate loader to handle this file type.
SyntaxError: Unexpected token (6:4)
at Parser.pp.raise (/scratch/parallel/repository/dropdowns/node_module/acorn/dist/acorn.js:923:13)

as per the comments below fixed the test pattern and added babel-core in the webpack.config.js. Here is my directory structure

Answer Source

Your test seems faulty:

test: "/.js$"

Try this:

test: /\.js$/
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