Whenever I have to create a new project, I prefer to keep my stack with only one language. So I love use javascript for everything, with Node.js, Express.js, React.js and I really like to use NoSQL databases like MongoDB in this case.
So I decided to share my experience of setting up this environment from scratch.
First, let's create a folder and generate our package.json file for this project.
$ mkdir node-react-starter
$ cd node-react-starter
$ npm init -y
Now, let's install the project dependencies
$ npm install --save express body-parser mongoose
In this project we use Express.js, a very popular framework for Node.js applications.
body-parser is used to parse incoming request bodies in a middleware before your handlers, available under the req.body property.
Mongoose is a MongoDB object modeling tool designed to work in an asynchronous environment.
Then, install the development dependencies
$ npm install --save-dev nodemon concurrently
nodemon is a package that runs the node.js application and listen to any file change, updating the entire app.
Concurrently allows us to run multiple npm commands at the same time.
After installing the dependencies, you should get a file like this:
Let's create the project structure
$ mkdir models routes
$ touch index.js
Open the index.js file and add the following code:
// index.js
const express = require('express');
const mongoose = require('mongoose');
const bodyParser = require('body-parser');
const app = express();
mongoose.Promise = global.Promise;
mongoose.connect(process.env.MONGODB_URI || `mongodb://localhost:27017/node-react-starter`);
app.use(bodyParser.json());
const PORT = process.env.PORT || 5000;
app.listen(PORT, () => {
console.log(`app running on port ${PORT}`)
});
After this, you can add a run script inside your package.json file, under scripts:
"server": "nodemon index.js"
At this point, you can run your backend and have a successful connection with the mongodb (MongoDB must be up and running). You can run the script you just created like so:
$ npm run server
Let's initiate our version control to keep track of every change. But first we need to add a .gitignore file in the root of our project with the following content:
node_modules
.idea
Then, we initiate our version control
$ git init
$ git add .
$ git commit -am "first commit"
We successfully created our backend structure, now let's jump to the frontend.
Now, let's create a React app with create-react-app.
$ create-react-app client
Now, in the client directory we have to add our dependencies.
Here we are going to use yarn to add this dependencies.
$ cd client
$ yarn add axios
axios is a very popular promise based HTTP client for the browser and node.js.
For react-scripts >= 0.2.3
For the current react version (and any other react-scripts > 0.2.3), you can simply add the following line to your package.json file in the client directory and that will allow you to proxy your front-end requests to the back-end app.
"proxy": "http://localhost:5000"
For react-scripts < 0.2.3
If you are using an older version of react-scripts you might need to add the following configuration to be able to connect the front-end with the back-end:
$ cd client
$ yarn add http-proxy-middleware
http-proxy-middleware is used to create a proxy from our react app to the backend app while on development.
We can now add the config file to setup the proxy to make requests from our frontend to our backend application.
Remember to add this configuration only if you are using an older react version, being react-scripts < 0.2.3.
In the directory /client/src, add the file setupProxy.js with the following content
// /client/src/setupProxy.js
const proxy = require('http-proxy-middleware')
module.exports = function(app) {
app.use(proxy('/api/*', { target: 'http://localhost:5000' }))
}
In the package.json in the root of the project, let's add the following run scripts:
"client": "npm run start --prefix client",
"server": "nodemon index.js",
"dev": "concurrently --kill-others-on-fail \"npm run server\" \"npm run client\"",
"start": "node index.js"
Now your package.json file should look like this:
{
"name": "node-react-starter",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"client": "npm run start --prefix client",
"server": "nodemon index.js",
"dev": "concurrently --kill-others-on-fail \"npm run server\" \"npm run client\"",
"start": "node index.js"
},
"keywords": [],
"author": "",
"license": "ISC",
"dependencies": {
"body-parser": "^1.19.0",
"express": "^4.17.1",
"mongoose": "^5.6.3"
},
"devDependencies": {
"concurrently": "^4.1.1",
"nodemon": "^1.19.1"
}
}
Now you are able to run the project with the following command:
$ npm run dev
This will run the backend application on port 5000, and the frontend on port 3000.
You should see the react application running on http://localhost:3000
To make our project production ready, we need to add the following lines in our index.js file, right after the app.use(bodyParser.json()) call:
if (process.env.NODE_ENV === 'production') {
app.use(express.static('client/build'));
const path = require('path');
app.get('*', (req,res) => {
res.sendFile(path.resolve(__dirname, 'client', 'build', 'index.html'))
})
}
This will redirect all the requests to our frontend application, unless we specify any route before this code.
Now let's create a simple interaction to see the proxy connection in action
Add the file Product.js inside the directory /models and insert the following code:
// /models/Product.js
const mongoose = require('mongoose');
const {Schema} = mongoose;
const productSchema = new Schema({
name: String,
description: String,
})
mongoose.model('products', productSchema);
Let's create a route for our backend API.
Add the file productRoutes.js inside the directory /routes and insert the following code:
// /routes/productRoutes.js
const mongoose = require('mongoose');
const Product = mongoose.model('products');
module.exports = (app) => {
app.get(`/api/product`, async (req, res) => {
let products = await Product.find();
return res.status(200).send(products);
});
app.post(`/api/product`, async (req, res) => {
let product = await Product.create(req.body);
return res.status(201).send({
error: false,
product
})
})
app.put(`/api/product/:id`, async (req, res) => {
const {id} = req.params;
let product = await Product.findByIdAndUpdate(id, req.body);
return res.status(202).send({
error: false,
product
})
});
app.delete(`/api/product/:id`, async (req, res) => {
const {id} = req.params;
let product = await Product.findByIdAndDelete(id);
return res.status(202).send({
error: false,
product
})
})
}
We can now import the models and routes files inside our index.js like so:
// /index.js
const express = require('express');
const mongoose = require('mongoose');
const bodyParser = require('body-parser');
// IMPORT MODELS
require('./models/Product');
const app = express();
mongoose.Promise = global.Promise;
mongoose.connect(process.env.MONGODB_URI || `mongodb://localhost:27017/node-react-starter`);
app.use(bodyParser.json());
//IMPORT ROUTES
require('./routes/productRoutes')(app);
if (process.env.NODE_ENV === 'production') {
app.use(express.static('client/build'));
const path = require('path');
app.get('*', (req,res) => {
res.sendFile(path.resolve(__dirname, 'client', 'build', 'index.html'))
})
}
const PORT = process.env.PORT || 5000;
app.listen(PORT, () => {
console.log(`app running on port ${PORT}`)
});
Now if we run the project we are able to make requests to our simple product api using the url http://localhost:5000/api/product.
Here we can get, insert, update and delete a product.
Back to the react application, lets add a service to make requests to the backend application.
Inside the folder /client/src create a folder called services and add a file productService.js with the following content:
// /client/src/services/productService.js
import axios from 'axios';
export default {
getAll: async () => {
let res = await axios.get(`/api/product`);
return res.data || [];
}
}
Now let's edit the App.js file, adding a simple UI that shows a list of products:
// /client/src/App.js
import React, { useState, useEffect } from "react";
// SERVICES
import productService from './services/productService';
function App() {
const [products, setproducts] = useState(null);
useEffect(() => {
if(!products) {
getProducts();
}
})
const getProducts = async () => {
let res = await productService.getAll();
console.log(res);
setproducts(res);
}
const renderProduct = product => {
return (
<li key={product._id} className="list__item product">
<h3 className="product__name">{product.name}</h3>
<p className="product__description">{product.description}</p>
</li>
);
};
return (
<div className="App">
<ul className="list">
{(products && products.length > 0) ? (
products.map(product => renderProduct(product))
) : (
<p>No products found</p>
)}
</ul>
</div>
);
}
export default App;
At this point, you can run the application again using the command npm run dev, and you will see the following screen:
Use a HTTP client like Postman or Insomnia to add some products. Make a POST request to http://localhost:5000/api/product with the following JSON content:
{
"name": "<product name>",
"description": "<product description here>"
}
Now, you will be able to see a list of products rendered on the screen, like so:
I hope you may find this tutorial useful and in the following days I will continue this tutorial showing how to Dockerize this app.
Also check this next post explaining how to deploy this app to heroku.
If you are interested in working with containers, I also made this post that explains How to dockerize this app and deploy to Heroku.
The source code can be found here
Top comments (73)
Hi Thiago, Thank you so much for this great tutorial. I followed the whole tutorial exactly as you mentioned and at the end when inserting the post requests to include some products... the console was showing this message:
GET localhost:3000/api/product 404 (Not Found)
dispatchXhrRequest @ xhr.js:178 ........
and then I changed in productService.js, axios.get("/api/product) for axios.get(
http://localhost:5000/api/product) and the whole app worked!I have the proxy in the package.json included and everything...but not sure if I missed something..do you know why this happens?Thank you in advance!!!
Another thing, you should not include the localhost in your axios.get function call.
It should be axios.get("/api/product", ...).
The base URL definition is already set at the beginning of the application when we build the server and define a port, in this case 5000.
Hi Oscar,
Are you getting this error in the front-end console or is it in an HTTP client?
If this is in your react app, it seems like something is wrong with the proxy config.
It was showing this error inside Chrome Devtools (where localhost:3000).
Are you able to insert data through an HTTP client like Insomnia or postman?
I think I found the issue. I had included the sentence "proxy": "localhost:5000" inside the package.json belonging to the server, and not inside the package.json of the client(react app). May be that one the problem Thiago? Because now I´m not getting any errors.
That was it, for sure Oscar.
Let me know if you have any other questions! :)
Hi Thiago, This is a best useful and easily guide for beginner like me but I am facing a some problem...
Last year I have done it finished once and it work completely in my macbook but now I do one more on VMware. Everything almost work but it stuck in front-end part.
My app can GET and POST to localhost:5000, data was completely send to database but now it never found "product" from database cause my localhost:3000 always show "No products found" and white blank page...
I think because of client side but I am not sure which code cause this. Could you please adviseme Thiago. Thanks you !
Hi Melonfrappe!
Can you check in your browser's console and network tab what are the errors you get while trying to fetch the data?
It smells like a proxy error maybe.
Hi Thiago, thanks for this tuto. i was fighting with the proxy, reading the comments section i realize that in your tuto you put the proxy in the server package.json and not in the package.json of the client, maybe you can fix that for the incoming readers. againg thank you for this amazing tutorial
Hi Daniel, you are totally right!
I am sorry I made you struggle with that, I just fixed it!
Thank you for letting me know that.
Thiago, this is great, thanks. I'm a newbie here and this is exactly what I was looking for as a fullstack setup. I've managed to incorporate this in my first "planner" app. Next step for me is to POST data to the DB through the front-end. Thanks again.
I am very happy to know that it helped you!
Let me know if you have any questions.
Just sharing
If you got these error messages below,
(node:48490) DeprecationWarning: current URL string parser is deprecated, and will be removed in a future version. To use the new parser, pass option { useNewUrlParser: true } to MongoClient.connect.
(node:48490) DeprecationWarning: current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to the MongoClient constructor.
Change the code something like this
mongoose.connect(
process.env.MONGOD_URL ||
mongodb://localhost:27017/fdaksjfafdsfasa,{ useNewUrlParser: true, useUnifiedTopology: true },
(err) => {
if (err) console.error(err);
else console.log("Connected to the mongodb");
}
);
Hi Thiago! Great article.
I have one question. Once I send a post request for new products, and I look at the app, I just see bullets, but no product names or descriptions. Any idea why that might be?
Thanks!
Hey Tomrains, thank you! :)
If you can see the bullets in your view after creating products, this should probably be a problem in your view.
I recommend you put a console.log(product) inside the renderProduct arrow function, right in the beginning.
Let me know what you got there.
Hey Thiago, here's what I see in the console after I added in console.log(product) to the renderProduct arrow function:
thepracticaldev.s3.amazonaws.com/i...
Humm I see, actually the problem must be when you are creating the products.
What response do you get after making the post request to create a product?
You should get something like this:
{
"error": false,
"product": {
"id": "5dab7eb6fc634a193f1f05f6",
"name": "product 1",
"description": "description",
"_v": 0
}
}
Here's what I'm getting:
thepracticaldev.s3.amazonaws.com/i...
So for some reason the response doesn't have the info I put in?
Oh I see tomrains, you are sending a post request with a x-www-form-urlencoded, when you should actually be sending a json.
I think in postman you should select the option raw.
Give it a try and let me know if it worked! :)
It woooorked! Thanks so much Thiago. I'm having fun building my MERN app now :D
Greaaaat!! Very glad to help :D
Hi Thiago,
I have a similar problem to the one reported by @tomrains , but the answer you gave did not allow me to solve it.
(Note: I'm new to Postman)
the response I get for localhost:5000/api/product?name=to... is
{"error":false,"product":{"id":"5ee204bbf1af38409c11d4de","_v":0}}
the response code is 201 Created.
In the Pretty - Raw - Preview section, I can't edit, it's read only
I added a Content-type: raw section in the headers but that didn't change anything.
I tried using curl, with this command: curl --location --request POST "localhost:5000/api/product" --header "Content-Type: raw" -d '{"name":"toto","description":"tata"}'
but the result seems to be the same...
Here's a screenshot of my postman app:
dev-to-uploads.s3.amazonaws.com/i/...
Hi Francis.
In your screenshot, I can see that you are sending query params with the values when you should actually be sending body data in postman.
You can select the body option and you will have a raw option below it.
Follow a screenshot below with an example:
dev-to-uploads.s3.amazonaws.com/i/...
thank you so much, Thiago! That was really quick! It works now. It seems obvious once you know where to look.
When I try to run the app, I get an error like the one below :/ which is annoying as it's a dependency. Anyone know what to do about that?
TypeError: Cannot use 'in' operator to search for 'autoCreate' in true
at NativeConnection.Connection.openUri (/Users/vhu02/Documents/Apprentice_work/node-react-starter/node_modules/mongoose/lib/connection.js:561:22)
at Mongoose.connect (/Users/vhu02/Documents/Apprentice_work/node-react-starter/node_modules/mongoose/lib/index.js:332:15)
at Object. (/Users/vhu02/Documents/Apprentice_work/node-react-starter/index.js:11:10)
at Module._compile (module.js:653:30)
at Object.Module._extensions..js (module.js:664:10)
at Module.load (module.js:566:32)
at tryModuleLoad (module.js:506:12)
at Function.Module._load (module.js:498:3)
at Function.Module.runMain (module.js:694:10)
at startup (bootstrap_node.js:204:16)
at bootstrap_node.js:625:3
[nodemon] app crashed - waiting for file changes before starting...
For the proxy issue follow the steps below.
Replace the ' const proxy' in setupProxy.js file with this.
const { createProxyMiddleware } = require('http-proxy-middleware');
module.exports = function(app) {
app.use('/api',
createProxyMiddleware({
target: 'localhost:5000',
changeOrigin: true
})
);
};
it works. You can follow . Please let me know here
Hey Veronika,
Could you share the code that reproduces this error, please?
There is nothing much to share as I just followed these steps haha
OMG really? haha
I just download the source code and tested it here. Everything works fine.
Could you try to clone the repo and test it just in case?
yeah so I forked your Github, and the proxy still isn't working. I seem to get a deprecation error
What you could try to do is to add the following line in your client/package.json file:
"proxy": "localhost:5000"
That should solve the problem.
I did try that as the other comment addressed it and it didn't seem to work.
the exact error I'm getting is this:
DeprecationWarning: current URL string parser is deprecated, and will be removed in a future version. To use the new parser, pass option { useNewUrlParser: true } to MongoClient.connect.
events.js:183
throw er; // Unhandled 'error' event
Veronika,
Does the error persist once you modify the line:
mongoose.connect(process.env.MONGODB_URI || 'mongodb://localhost:27017/node-react-starter',{ useNewUrlParser: true });
as suggested by the Deprecation Warning?
What is the prompt error if so?
This deprecation warning should not prevent you from running the app, but the rpacheco suggestion should do the trick.
You can also add this config on another line, like so:
mongoose.set("useNewUrlParser", true);
You might also find other deprecation warnings in the future, follow a list below in case you need it.
mongoose.set("useFindAndModify", false);
mongoose.set("useCreateIndex", true);
mongoose.set("useUnifiedTopology", true);
Let me know if that worked for you.
Hi! excellent post. i like this configuration and now i'm using it. But i have a problem, i don't know how configure script for debug in vscode. i was trying but with bad results. Could help me with this?
Hi Leo,
You can create a file launch.json inside the folder .vscode with the following code:
{
"version": "0.2.0",
"configurations": [
{
"name": "Launch via npm",
"type": "node",
"request": "launch",
"cwd": "${workspaceFolder}",
"runtimeExecutable": "npm",
"runtimeArgs": ["run-script", "dev"],
"port": 9229
},
]
}
Then you can just hit F5 and your app might run.
Let me know if that works for you! :)
Hi thiago, Thanks for response. i was make that how you tell me but pick a error ECONNREFUSED.
reason: Cannot connect to the target: connect ECONNREFUSED 127.0.0.1:9229.
the .vscode is the same that you give me, and the package.json is the same that the tutorial.
server for mongodb is up, but for the error my targe is wrong.
thi is my index.js
dev-to-uploads.s3.amazonaws.com/i/...
Hi Leo,
Sorry, You should also have a new debug script in your package.json file. Add the following script to your package.json:
"debug": "nodemon --nolazy --inspect-brk=9229 index.js",
Also, update the launch.json runtimeArgs to use this new script:
"runtimeArgs": ["run-script", "debug"],
Let me know if that works for you
Hi there,
so I found app.delete(
/api/product/:id, async (req, res) => {const {id} = req.params;
let product = await Product.findByIdAndDelete(id);
return res.status(202).send({
error: false,
product
})
})
that I try to call from postman with:
localhost:5000/api/product/:id
With a raw body of JSON of:
{"name": "myName"}
but it sais:
Cannot DELETE /api/product/
Do you guys know what Im missing?
Thanks in advance!
Csaba
Hi Csaba,
By the error, it could be something wrong with the definition of this app.delete method.
Does your backend log any error in the terminal when you test this endpoint?
If everything is correct in your code, the error could be the ID you are passing in the URL.
As this is just a simple tutorial and I wanted it to be short, it does not have validations but, in a final application, it should contain a lot of validations on the data we are trying to execute actions.
My suggestion to you is to check if the ID you are passing to the URL
http://localhost:5000/api/product/<YOUR-PRODUCT-ID>is a valid ID.Let me know if this helped you solve the problem and do not hesitate to ask if you have more questions.
This is a great article!
And a big thank you, for also showing the configuration for production/deployment.
I feel that it's often left out, and for a beginner in the web development field, this is key!
Keep up the good work!
Thank you, Jonas!
Let me know if you need any help :)