[javascript] babel-loader jsx SyntaxError: Unexpected token

I'm a beginner in React + Webpack.

I found a weird error in my hello world web app.

I'm using babel-loader in webpack to help me convert jsx into js, but it seems like babel can't understand jsx syntax.

Here are my dependencies:

"devDependencies": {
  "babel-core": "^6.0.14",
  "babel-loader": "^6.0.0",
  "webpack": "^1.12.2",
  "webpack-dev-server": "^1.12.1"
},
"dependencies": {
  "react": "^0.14.1"
}

Here is my webpack.config.js

var path = require('path');
module.exports = {
  entry: ['webpack/hot/dev-server',path.resolve(__dirname, 'app/main.js')],
  output: {
    path: path.resolve(__dirname, 'build'),
    filename: 'bundle.js'
  },
  module: {
      loaders: [
          { test: /\.js$/, exclude: /node_modules/, loader: "babel-loader"}
      ]
  }
};

Here is my app/main.js

var React = require("react");
React.render(<h1>hello world</h1>,document.getElementById("app"));

And this is the error message

ERROR in ./app/main.js
Module build failed: SyntaxError: ~/**/app/main.js: Unexpected token (2:13)
  1 | var React = require("react");
> 2 | React.render(<h1>hello world</h1>,document.getElementById("app"));
    |              ^
at Parser.pp.raise (~/**/node_modules/babylon/lib/parser/location.js:24:13)

Thanks for you guys.

For those who still might be facing issue adding jsx to test fixed it for me

test: /\.jsx?$/,

For me the solution was to create the file .babelrc with this content:

{
  "presets": ["react", "es2015", "stage-1"]
}

This works perfect for me

{
    test: /\.(js|jsx)$/,
    loader: 'babel-loader',
    exclude: /node_modules/,
    query: {
        presets: ['es2015','react']
    }
},

I ran into a similar issue when migrating from babel 5 to babel 6.

I was just running babel to compile the src to lib folder babel src --out-dir lib

I will share my setup for babel 6:

Ensure you have the following babel 6 devDependencies installed

"babel-core": "^6.7.6",
"babel-loader": "^6.2.4",
"babel-preset-es2015": "^6.6.0",
"babel-preset-react": "^6.5.0",
"babel-preset-stage-0": "^6.5.0"

Add your .babelrc file to the project:

{
  "presets": ["es2015", "stage-0", "react"]
}

The following way has helped me (includes react-hot, babel loaders and es2015, react presets):

loaders: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        loaders: ['react-hot', 'babel?presets[]=es2015&presets[]=react']
      }
]

You can find a really good boilerplate made by Henrik Joreteg (ampersandjs) here: https://github.com/HenrikJoreteg/hjs-webpack

Then in your webpack.config.js

var getConfig = require('hjs-webpack')

module.exports = getConfig({
  in: 'src/index.js',
  out: 'public',
  clearBeforeBuild: true,
  https: process.argv.indexOf('--https') !== -1
})

Since the answer above still leaves some people in the dark, here's what a complete webpack.config.js might look like:

var path = require('path');_x000D_
var config = {_x000D_
    entry: path.resolve(__dirname, 'app/main.js'),_x000D_
    output: {_x000D_
        path: path.resolve(__dirname, 'build'),_x000D_
        filename: 'bundle.js'_x000D_
    },_x000D_
    module: {_x000D_
        loaders: [{_x000D_
            test: /\.jsx?$/,_x000D_
            loader: 'babel',_x000D_
            query:_x000D_
            {_x000D_
                presets:['es2015', 'react']_x000D_
            }_x000D_
        }]_x000D_
    },_x000D_
_x000D_
};_x000D_
_x000D_
module.exports = config;