Unable to configure webpack.config file

Question

Whenever I run webpack-dev-server it throws this error:

....webpack/hot/only-dev-server ./src Module not found: Error: Can't resolve './src' in 'C:\....

Here's the webpack.config.js file

var webpack = require('webpack');
var path = require('path');

module.exports = {
    devtool: "inline-source-map",
    entry: [
        "webpack-dev-server/client?http://127.0.0.1:8080/",
        "webpack/hot/only-dev-server",
        "./src"
    ],
    output: {
        path: path.join(__dirname, 'public'),
        filename: 'bundle.js'
    },
    resolve: {
        modules: ['node_modules', 'src'],
        extensions: ['.js']
    },
    module: {
        loaders: [
            {
                test: /\.jsx?$/,
                exclude: /(node_modules|bower_components)/,
                loaders: ['react-hot-loader','babel-core?presets[]=react,presets[]=es2015'],
            }
        ]
    },
    plugins: [
        new webpack.HotModuleReplacementPlugin(),
        new webpack.NoEmitOnErrorsPlugin()
    ],
};

Package.json

{
  "name": "react-todo",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "babel": "^6.23.0",
    "babel-core": "^6.23.1",
    "babel-loader": "^6.3.2",
    "babel-plugin-add-module-exports": "^0.2.1",
    "babel-plugin-react-html-attrs": "^2.0.0",
    "babel-plugin-transform-class-properties": "^6.23.0",
    "babel-plugin-transform-decorators-legacy": "^1.3.4",
    "babel-preset-es2015": "^6.22.0",
    "babel-preset-react": "^6.23.0",
    "babel-preset-stage-0": "^6.22.0",
    "lodash": "^4.17.4",
    "react": "^15.4.2",
    "react-dom": "^15.4.2",
    "webpack": "^2.2.1",
    "webpack-dev-server": "^2.3.0"
  },
  "devDependencies": {
    "react-hot-loader": "^1.3.1"
  }
}

How do I fix it?

Answer 1

It seems you are using Windows ('C:\...' in the error message), and webpack expects windows path separators, like \, not /. Could you try ".\src\your_entry_file.js" instead "./src"?

Answer 2

Try this:

update your package json to this:

{
  "name": "react-todo",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "node server.js"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "lodash": "^4.17.4",
    "react": "^15.4.2",
    "react-dom": "^15.4.2"
  },
  "devDependencies": {
    "react-hot-loader": "^1.3.1",
    "webpack": "^2.2.1",
    "webpack-dev-server": "^2.3.0",
    "babel": "^6.23.0",
    "babel-core": "^6.23.1",
    "babel-loader": "^6.3.2",
    "babel-plugin-add-module-exports": "^0.2.1",
    "babel-plugin-react-html-attrs": "^2.0.0",
    "babel-plugin-transform-class-properties": "^6.23.0",
    "babel-plugin-transform-decorators-legacy": "^1.3.4",
    "babel-preset-es2015": "^6.22.0",
    "babel-preset-react": "^6.23.0",
    "babel-preset-stage-0": "^6.22.0",
  }
}

Then run npm install from the root of your project folder

Update your webpack.config.js to this

var webpack = require('webpack');
var path = require('path');

module.exports = {
    devtool: "inline-source-map",
    entry: [
        "webpack-dev-server/client?http://127.0.0.1:8080/",
        "webpack/hot/only-dev-server",
        "./src/app.js" // or whatever your entry file is
    ],
    output: {
        path: path.join(__dirname, 'public'),
        filename: 'bundle.js'
    },
    resolve: {
        modules: ['node_modules', 'src'],
        extensions: ['.js']
    },
    module: {
        loaders: [
            {
                test: /\.js$/,
                exclude: /(node_modules|bower_components)/,
                loader: 'babel-loader',
                query: {
                    presets: ['es2015']
                }
            },
            // the loader should be broken up into two objects
            { test: /\.jsx?$/, loaders: ['react-hot', 'jsx?harmony'], include: path.join(__dirname, 'src') }
        ]
    },
    plugins: [
        new webpack.HotModuleReplacementPlugin(),
        new webpack.NoEmitOnErrorsPlugin()
    ],
};

Download this server.js file and save it to the project folder.

Then try npm start

hopefully that works. good luck. Refer here