He worked. Now when I add a breakpoint:
saveSnippet: (title, imageUrl, role) => { debugger; ...
Chrome Result (53):

I tried playing with it and changing the configuration to 'cheap-module-source-map' and 'eval-source-map' and 'source -map . Now only 'eval-source-map' and 'source-map' work .
Webpack.config.js (Webpack 1.13.2):
var path = require('path') var webpack = require('webpack') var CompressionPlugin = require("compression-webpack-plugin"); module.exports = { debug: true, pathinfo:true, devtool: 'cheap-module-eval-source-map', entry: [ 'webpack-hot-middleware/client', './app/index' ], output: { path: path.join(__dirname, 'dist'), filename: 'bundle.js', publicPath: '/static/' }, plugins: [ new webpack.optimize.OccurrenceOrderPlugin(), new webpack.HotModuleReplacementPlugin(), new CompressionPlugin({ asset: "[path].gz[query]", algorithm: "gzip", test: /\.js$|\.css$|\.html$/, threshold: 10240, minRatio: 0.8 }) ], module: { loaders: [{ test: /\.js$/, loaders: ['babel'], exclude: /node_modules/, include: __dirname }] } }
javascript webpack babeljs
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