Node.js/Redux/Express error - node.js

Question

I am teaching myself to use Nodejs with Redux and Express. I have a tag in my view, and that's it. Very, very basic. I am getting an error in my console that I don't understand:
Uncaught ReferenceError: process is not defined
at Object.<anonymous> (bundle.js:548)
at __webpack_require__ (bundle.js:20)
at Object.defineProperty.value (bundle.js:492)
at __webpack_require__ (bundle.js:20)
at Object.<anonymous> (bundle.js:482)
at __webpack_require__ (bundle.js:20)
at __webpack_exports__.b (bundle.js:63)
at bundle.js:66
Can someone help me figure out what this means?
Here is my server.js file:
"use strict"
var express = require('express');
var app = express();
var path = require('path');
// MIDDLEWARE TO DEFINE FOLDER FOR STATIC FILES
app.use(express.static('public'))
app.get('/', function(req, res){
res.sendFile(path.resolve(__dirname, 'public', 'index.html'))
})
app.listen(3000, function(){
console.log('app is listening');
})
Here is my app.js file:
"use strict"
import {createStore} from 'redux'
// STEP 3 define reducers
const reducer = function(state=0, action){
switch(action.type){
case "INCREMENT":
return state + action.payload;
break;
}
return state
}
// STEP 1 create the store
const store = createStore(reducer);
store.subscribe(function(){
console.log('current state is: ' + store.getState());
})
// STEP 2 create and dispatch actions
store.dispatch({type: "INCREMENT", payload: 1 })
Here is my webpack.config.js file:
var path = require('path');
const webpack = require('webpack');
module.exports = {
entry: ['./src/app.js'],
output: {
filename: 'bundle.js',
path: path.resolve(__dirname, 'public')
},
target: 'node',
watch: true,
module: {
loaders: [
{
test: /\.js$/,
exclude: /node_modules/,
loader: 'babel-loader',
query: {
presets: ['react', 'es2015', 'stage-1']
}
}
]
}
}

Answer 1

Try adding this code to the plugin portion of your webpack.config
new webpack.DefinePlugin({
"process.env": {
NODE_ENV: JSON.stringify("production") //or "development"
}
});
You can read about why this might be your issue below. Basically you need to give webpack a NODE_ENV variable.
https://github.com/facebook/react/blob/f7850dd3d78d313a9e7774870e85c32719fbe233/docs/docs/getting-started.md