Skip to main content

Part-1 | NestJS(v9) | ReactJS(v18) | MongoDB | CRUD Example

The main objectives of this article are:
  • NestJS And ReactJS Application Communication.
  • NestJS.
  • Create NestJS Application.
  • Debug The NestJS Application From Visual Studio Code.
  • ReactJS
  • Create ReactJS Applicaiton
  • Install React Bootstrap
  • Add React Bootstrap Menu.

NestJS And ReactJS Application Communication:

  • The user request the ReactJS application(single page application) then js files are downloaded and then runs the application on the browser.
  • Since ReactJS is a single-page application it depends on API for data to display.
  • So ReactJS request the NestJS endpoint through HTTP requests.
  • NestJS API that runs at the server gives the JSON response. NestJS API communicates with the database for fetching and storing the data.

NestJS:

NestJS is a framework used to develop the server-side application. NestJS is built on top of the Node.js framework just like Express. It is a combination of Progressive Javascript, Object-Oriented Programming, Functional Programming, and Functional Reactive Programming.

NestJS application built with 'Models' and 'Controllers' to serve an HTTP request. NestJS works with TypeScript for strongly typed programming.

Create NestJS Application:

To run or set up the NestJS or ReactJS application, first, we must contain the 'Node.js' in our local machine. So to download and install the 'Node.js' go to 'https://nodejs.org/en/download/'. 

Next, we have to install the NestJS CLI into our local machine.
npm i -g @nestjs/cli

Run the below command to create the NestJS application.
nest new your-project-name

Command to start the NestJS application.
npm run start

Explore our new NestJS application:

package.json - The 'package.json' file contains 'dependencies'(libraries that nestjs depends on), 'devdependencies'(libraries that are required for development), 'scripts'(commands to run, debug, tests, etc), etc.

tsconfig.json - The 'tsconfig.json' file contains the configuration to build the project.

main.ts - The 'main.ts' file is the entry file of our application. Here we can see our application port number. Here we can observe it loads the 'AppModule'.

app.module.ts - The 'app.module.ts' file is our entry file.

app.controller.ts - The 'app.controller.ts' file is the default controller file which either we can use or ignore it.

app.service.ts - The 'app.service.ts' file is the default service file which either we can use or ignore it.

Change Default Port Number:

By default, the NestJS runs at port number '3000', but for ReactJS application also runs under port number '3000'. So let's change our 'NestJS' application port number to something like '4000' in the 'src/main.ts' file.

Debug NestJS Application From Visual Studio Code:

Let's understand how to enable the debugger in the NestJS application using Visual Studio Code.

Run the below command to start the nestjs application in debug mode.
npm run start:debug

Now select the 'Run & Debug'  and then click on 'create a launch.json' and then select  the 'Node JS'
 as the environment.
Now in the 'launch.json' file replace the 'configuration' array as follows.
.vscode/launch.json:
{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Attach",
            "port": 9229,
            "request": "attach",
            "skipFiles": [
                "<node_internals>/**"
            ],
            "type": "node"
        }
    ]
}
Now add the debugger in any part of the controller and then click on 'start debug'.

ReactJS:

ReactJS is a javascript library for creating user interface components. ReactJS components contain javascript function and they return JSX(JavaScript XML) as output. ReactJS effectively renders and update the component on data changes.

Create ReactJS Application:

Command to create the ReactJS application.
npx create-react-app my-app

Command to start and run the ReactJS application server.
npm start

Let's go through the project and explore the important files.

index.html -  Inside the public folder we can see the index.html. Only the HTML file of the entire ReactJS application. It contains a  'div' element whose 'id' value is 'root', inside of this element all the ReactJS components get rendered.

index.js - Entry javascript file for ReactJS. It helps to paint 'App' component content in 'index.html'.

App.js - The 'App.js' react component. It returns the 'JSX'(Javascript XML) content(JSX means writing the HTML code inside of the javascript directly).

Install React Bootstrap:

ReactJS Bootstrap is just built on Bootstrap. So that all UI components are straightforward to integrate into the ReactJS application.

Command to install the ReactJS bootstrap.
npm install react-bootstrap bootstrap

Now import the bootstrap CSS node module file reference on the 'index.js'.
src/index.js:
import React from "react";
import ReactDOM from "react-dom/client";
import "./index.css";
import App from "./App";
import 'bootstrap/dist/css/bootstrap.min.css'

const root = ReactDOM.createRoot(document.getElementById("root"));
root.render(<App />);
  • (Line: 5) Added the bootstrap CSS file reference.
  • Here removed existing default code like 'reprtWebVitals' and 'React.StrictMode'(react component) which we won't require for learning.

Add React Bootstrap Menu:

The 'Menu' is shared content for all the pages in any application. So let's create separate components like 'Layout.js' inside of a new folder path like 'components/shared'.
src/components/shared/Layout.js:
import { Container } from "react-bootstrap";
import Navbar from "react-bootstrap/Navbar";

const Layout = ({ children }) => {
  return (
    <>
      <Navbar bg="primary" variant="dark">
        <Navbar.Brand>Navbar</Navbar.Brand>
      </Navbar>
      <Container>{children}</Container>
    </>
  );
};

export default Layout;
  • Here 'Layout' is our component function entire logic is added inside of it and this function returns JSX content. The 'Layout' function has input parameters like 'children' t.
  • (Line: 1&2) Imported the react-bootstrap component like 'Containers' & 'Navbar'.
  • (Line: 13) The 'Layout' function must be render as custom tag like '<Layout></Layout>'. So to read the content inside of the 'Layout' element we have to use 'children' and to render content we have to ReactJS expressions like '{}'(this can render plain text, HTML, and even executes logical expressions).
Since 'App.js' entry component, so let's encapsulate its content inside of the 'Layout' element tag as follows.
src/App.js:
import logo from './logo.svg';
import './App.css';
import Layout from './components/shared/Layout';

function App() {
  return (
    <Layout><h1>Welcome!</h1></Layout>
  );
}
export default App;

Support Me!
Buy Me A Coffee PayPal Me

Video Session:

Wrapping Up:

Hopefully, I think this article delivered some useful information on NestJS(v9) | ReactJS(v18) CRUD sample. I love to have your feedback, suggestions, and better techniques in the comment section below.

Refer:



Follow Me:

Comments

Popular posts from this blog

Angular 14 Reactive Forms Example

In this article, we will explore the Angular(14) reactive forms with an example. Reactive Forms: Angular reactive forms support model-driven techniques to handle the form's input values. The reactive forms state is immutable, any form filed change creates a new state for the form. Reactive forms are built around observable streams, where form inputs and values are provided as streams of input values, which can be accessed synchronously. Some key notations that involve in reactive forms are like: FormControl - each input element in the form is 'FormControl'. The 'FormControl' tracks the value and validation status of form fields. FormGroup - Track the value and validate the state of the group of 'FormControl'. FormBuilder - Angular service which can be used to create the 'FormGroup' or FormControl instance quickly. Form Array - That can hold infinite form control, this helps to create dynamic forms. Create An Angular(14) Application: Let'

.NET 7 Web API CRUD Using Entity Framework Core

In this article, we are going to implement a sample .NET 7 Web API CRUD using the Entity Framework Core. Web API: Web API is a framework for building HTTP services that can be accessed from any client like browser, mobile devices, and desktop apps. In simple terminology API(Application Programming Interface) means an interface module that contains programming functions that can be requested via HTTP calls either to fetch or update data for their respective clients. Some of the Key Characteristics of API: Supports HTTP verbs like 'GET', 'POST', 'PUT', 'DELETE', etc. Supports default responses like 'XML' and 'JSON'. Also can define custom responses. Supports self-hosting or individual hosting, so that all different kinds of apps can consume it. Authentication and Authorization are easy to implement. The ideal platform to build the REST full services. Install The SQL Server And SQL Management Studio: Let's install the SQL server on our l

ReactJS(v18) JWT Authentication Using HTTP Only Cookie

In this article, we will implement the ReactJS application authentication using the HTTP-only cookie. HTTP Only Cookie: In a SPA(Single Page Application) Authentication JWT token either can be stored in browser 'LocalStorage' or in 'Cookie'. Storing the JWT token inside of the cookie then the cookie should be HTTP Only. The HTTP-ONly cookie nature is that it will be only accessible by the server application. Client apps like javascript-based apps can't access the HTTP-Only cookie. So if we use the authentication with HTTP-only JWT cookie then we no need to implement the custom logic like adding authorization header or storing token data, etc at our client application. Because once the user authenticated cookie will be automatically sent to the server by the browser on every API call. Authentication API: To authenticate our client application with JWT HTTP-only cookie, I developed a NetJS(which is a node) Mock API. Check the GitHub link and read the document on G

.NET6 Web API CRUD Operation With Entity Framework Core

In this article, we are going to do a small demo on AspNetCore 6 Web API CRUD operations. What Is Web API: Web API is a framework for building HTTP services that can be accessed from any client like browser, mobile devices, desktop apps. In simple terminology API(Application Programming Interface) means an interface module that contains a programming function that can be requested via HTTP calls to save or fetch the data for their respective clients. Some of the key characteristics of API: Supports HTTP verbs like 'GET', 'POST', 'PUT', 'DELETE', etc. Supports default responses like 'XML' and 'JSON'. Also can define custom responses. Supports self-hosting or individual hosting, so that all different kinds of apps can consume it. Authentication and Authorization are easy to implement. The ideal platform to build REST full services. Create A .NET6 Web API Application: Let's create a .Net6 Web API sample application to accomplish our

Angular 14 State Management CRUD Example With NgRx(14)

In this article, we are going to implement the Angular(14) state management CRUD example with NgRx(14) NgRx Store For State Management: In an angular application to share consistent data between multiple components, we use NgRx state management. Using NgRx state helps to avoid unwanted API calls, easy to maintain consistent data, etc. The main building blocks for the NgRx store are: Actions - NgRx actions represents event to trigger the reducers to save the data into the stores. Reducer - Reducer's pure function, which is used to create a new state on data change. Store - The store is the model or entity that holds the data. Selector - Selector to fetch the slices of data from the store to angular components. Effects - Effects deals with external network calls like API. The effect gets executed based the action performed Ngrx State Management flow: The angular component needs data for binding.  So angular component calls an action that is responsible for invoking the API call.  Aft

Angular 14 Crud Example

In this article, we will implement CRUD operation in the Angular 14 application. Angular: Angular is a framework that can be used to build a single-page application. Angular applications are built with components that make our code simple and clean. Angular components compose of 3 files like TypeScript File(*.ts), Html File(*.html), CSS File(*.cs) Components typescript file and HTML file support 2-way binding which means data flow is bi-directional Component typescript file listens for all HTML events from the HTML file. Create Angular(14) Application: Let's create an Angular(14) application to begin our sample. Make sure to install the Angular CLI tool into our local machine because it provides easy CLI commands to play with the angular application. Command To Install Angular CLI npm install -g @angular/cli Run the below command to create the angular application. Command To Create Angular Application ng new name_of_your_app Note: While creating the app, you will see a noti

Unit Testing Asp.NetCore Web API Using xUnit[.NET6]

In this article, we are going to write test cases to an Asp.NetCore Web API(.NET6) application using the xUnit. xUnit For .NET: The xUnit for .Net is a free, open-source, community-focused unit testing tool for .NET applications. By default .Net also provides a xUnit project template to implement test cases. Unit test cases build upon the 'AAA' formula that means 'Arrange', 'Act' and 'Assert' Arrange - Declaring variables, objects, instantiating mocks, etc. Act - Calling or invoking the method that needs to be tested. Assert - The assert ensures that code behaves as expected means yielding expected output. Create An API And Unit Test Projects: Let's create a .Net6 Web API and xUnit sample applications to accomplish our demo. We can use either Visual Studio 2022 or Visual Studio Code(using .NET CLI commands) to create any.Net6 application. For this demo, I'm using the 'Visual Studio Code'(using the .NET CLI command) editor. Create a fo

Part-1 Angular JWT Authentication Using HTTP Only Cookie[Angular V13]

In this article, we are going to implement a sample angular application authentication using HTTP only cookie that contains a JWT token. HTTP Only JWT Cookie: In a SPA(Single Page Application) Authentication JWT token either can be stored in browser 'LocalStorage' or in 'Cookie'. Storing JWT token inside of the cookie then the cookie should be HTTP Only. The HTTP-Only cookie nature is that it will be only accessible by the server application. Client apps like javascript-based apps can't access the HTTP-Only cookie. So if we use authentication with HTTP only JWT cookie then we no need to implement custom logic like adding authorization header or storing token data, etc at our client application. Because once the user authenticated cookie will be automatically sent to the server by the browser on every API call. Authentication API: To implement JWT cookie authentication we need to set up an API. For that, I had created a mock authentication API(Using the NestJS Se

ReactJS(v18) Authentication With JWT AccessToken And Refresh Token

In this article, we are going to do ReactJS(v18) application authentication using the JWT Access Token and Refresh Token. JSON Web Token(JWT): JSON Web Token is a digitally signed and secured token for user validation. The JWT is constructed with 3 important parts: Header Payload Signature Create ReactJS Application: Let's create a ReactJS application to accomplish our demo. npx create-react-app name-of-your-app Configure React Bootstrap Library: Let's install the React Bootstrap library npm install react-bootstrap bootstrap Now add the bootstrap CSS reference in 'index.js'. src/index.js: import 'bootstrap/dist/css/bootstrap.min.css' Create A React Component 'Layout': Let's add a React component like 'Layout' in 'components/shared' folders(new folders). src/components/shared/Layout.js: import Navbar from "react-bootstrap/Navbar"; import { Container } from "react-bootstrap"; import Nav from "react-boot

A Small Guide On NestJS Queues

NestJS Application Queues helps to deal with application scaling and performance challenges. When To Use Queues?: API request that mostly involves in time taking operations like CPU bound operation, doing them synchronously which will result in thread blocking. So to avoid these issues, it is an appropriate way to make the CPU-bound operation separate background job.  In nestjs one of the best solutions for these kinds of tasks is to implement the Queues. For queueing mechanism in the nestjs application most recommended library is '@nestjs/bull'(Bull is nodejs queue library). The 'Bull' depends on Redis cache for data storage like a job. So in this queueing technique, we will create services like 'Producer' and 'Consumer'. The 'Producer' is used to push our jobs into the Redis stores. The consumer will read those jobs(eg: CPU Bound Operations) and process them. So by using this queues technique user requests processed very fastly because actually