javascript - React, babel, webpack not parsing jsx code - Stack Overflow

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webpack.config.js

module.exports = {
  context: __dirname + "/app",
  entry: {
    javascript: "./app.js",
    html: "./index.html",
  },
  resolve: {
   extensions: ['', '.js', '.jsx']
 },
  output: {
    filename: "app.js",
    path: __dirname + "/dist",
  },
  module: {
    loaders: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        loader: "babel-loader",
      },
      {
        test: /\.html$/,
        loader: "file?name=[name].[ext]",
      },
    ],
  },
}

package.json

{
  "name": "react-webpack-project",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel": "^6.0.15",
    "babel-core": "^6.0.20",
    "babel-loader": "^6.0.1",
    "file-loader": "^0.8.4",
    "webpack": "^1.12.2"
  },
  "dependencies": {
    "react": "^0.14.2"
  }
}

app/app.js

import React from "react";
import Greeting from "./greeting";

React.render(
  <Greeting name="World"/>,
  document.body
);

I have seen the exact same questions after searching around, but none of the answers seemed to apply to me. I am getting the following error when running webpack :

ERROR in ./app.js
Module build failed: SyntaxError: path/to/project/react-webpack-project/app/app.js: Unexpected token (5:2)

React.render(
  <Greeting name="World"/>,
  document.body
);

webpack.config.js

module.exports = {
  context: __dirname + "/app",
  entry: {
    javascript: "./app.js",
    html: "./index.html",
  },
  resolve: {
   extensions: ['', '.js', '.jsx']
 },
  output: {
    filename: "app.js",
    path: __dirname + "/dist",
  },
  module: {
    loaders: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        loader: "babel-loader",
      },
      {
        test: /\.html$/,
        loader: "file?name=[name].[ext]",
      },
    ],
  },
}

package.json

{
  "name": "react-webpack-project",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel": "^6.0.15",
    "babel-core": "^6.0.20",
    "babel-loader": "^6.0.1",
    "file-loader": "^0.8.4",
    "webpack": "^1.12.2"
  },
  "dependencies": {
    "react": "^0.14.2"
  }
}

app/app.js

import React from "react";
import Greeting from "./greeting";

React.render(
  <Greeting name="World"/>,
  document.body
);

I have seen the exact same questions after searching around, but none of the answers seemed to apply to me. I am getting the following error when running webpack :

ERROR in ./app.js
Module build failed: SyntaxError: path/to/project/react-webpack-project/app/app.js: Unexpected token (5:2)

React.render(
  <Greeting name="World"/>,
  document.body
);

I am not sure why I am getting this error still. I am guessing it has something to do with my webpack.config.js file, but not 100% what the problem is.

• javascript
• node.js
• reactjs
• webpack
• babeljs

Share Improve this question Follow asked Nov 3, 2015 at 21:51 httpNickhttpNick 2,61411 gold badge2323 silver badges3636 bronze badges 2

• Did you try this solution ? link – The Reason Commented Nov 3, 2015 at 22:08
• I think the problem is that you have multiple loaders defined; checkout my answer below -- I think that using a .babelrc file will do the trick! – JESii Commented Jan 2, 2016 at 17:02

Add a comment  | 

5 Answers 5

Sorted by: Reset to default 9

You need to add presets to your babel-loader:

{
        test: /\.jsx?$/,
        exclude: /node_modules/,
        loader: "babel-loader",
        presets: ['es2015', 'react']  
},

http://babeljs.io/docs/plugins/#presets

First of all: if you are using React v^0.14, you should render your code using React-Dom. https://www.npmjs.com/package/react-dom

Second, this should resolve your problem: babel-loader jsx SyntaxError: Unexpected token

I'm currently using React 0.14.3. The ReactDOM solution did not work, nor did adding the babel presets into the webpack.config.js. Basically, those solutions appear to work only if you have a single loader defined, but I had both the babel-loader as well as the react-hot loader.

What DID work was to install the babel react presets module:

npm install babel-preset-react

and then create a .babelrc file in my project directory with the following:

{
  "presets": ['react']
}

This is documented at http://babeljs.io/docs/plugins/preset-react/, as pointed to by Abhinav Singi

For me the answer was to include the presets in the query block:

query: {
  presets: ['react', 'es2015']
}

this is help me to solved that issue.

create new file .babelrc on same directory webpack.config.js. Add this to .babelrc

  {
  "stage": 2,
  "env": {
    "development": {
      "plugins": [
        "react-display-name",
        "react-transform"
      ],
      "extra": {
        "react-transform": {
          "transforms": [{
            "transform": "react-transform-hmr",
            "imports": ["react"],
            "locals":  ["module"]
          }]
        }
      }
    }
  }
}

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