Build a Basic CRUD App with Angular and Node
Tags: crud, angular, node, tutorial
Published: 2019-04-25 21:10:01

---
title: Build a Basic CRUD App with Angular and Node
published: true
tags: crud, angular, node, tutorial
description: In this tutorial, you'll learn how to build a Node API and an Angular app that can manage its data. 
canonical_url: https://developer.okta.com/blog/2018/10/30/basic-crud-angular-and-node
cover_image: https://developer.okta.com/assets-jekyll/blog/angular-node/single-page-app-54193ed48ed3e03b9b12a3f8d425c390940cb6b7dfed337d28424045b470915a.png
---

In recent years, single page applications (SPAs) have become more and more popular. A SPA is a website that consists of just one page. That lone page acts as a container for a JavaScript application. The JavaScript is responsible for obtaining the content and rendering it within the container. The content is typically obtained from a web service and RESTful APIs have become the go-to choice in many situations. The part of the application making up the SPA is commonly known as the _client_ or _front-end_, while the part responsible for the REST API is known as the _server_ or _back-end_. In this tutorial, you will be developing a simple Angular single page app with a REST backend, based on Node and Express.

You’ll be using Angular as it follows the MVC pattern and cleanly separates the View from the Models. It is straightforward to create HTML templates that are dynamically filled with data and automatically updated whenever the data changes. I have come to love this framework because it is very powerful, has a huge community and excellent documentation.

For the server, you will be using Node with Express. Express is a framework that makes it easy to create REST APIs by allowing to define code that runs for different requests on the server. Additional services can be plugged in globally, or depending on the request. There are a number of frameworks that build on top of Express and automate the task of turning your database models into an API. This tutorial will not make use of any of these in order to keep this focused.

Angular encourages the use of TypeScript. TypeScript adds typing information to JavaScript and, in my opinion, is the future of developing large scale applications in JavaScript. For this reason, you will be developing both client and server using TypeScript.

Here are the libraries you’ll be using for the client and the server:

- **Angular:** The framework used to build the client application
- **Okta for Authorisation:** A plugin that manages single sign-on authorization using Okta, both on the client and the server
- **Angular Material:** An angular plugin that provides out-of-the-box Material Design
- **Node:** The actual server running the JavaScript code
- **Express:** A routing library for responding to server requests and building REST APIs
- **TypeORM:** A database ORM library for TypeScript

## Start Your Basic Angular Client Application

Let’s get started by implementing a basic client using Angular. The goal is to develop a product catalog which lets you manage products, their prices, and their stock levels. At the end of this section, you will have a simple application consisting of a top bar and two views, Home and Products. The Products view will not yet have any content and nothing will be password protected. This will be covered in the following sections.

To start you will need to install Angular. I will assume that you already have Node installed on your system and you can use the `npm` command. Type the following command into a terminal.

```bash
npm install -g @angular/cli@7.0.2

```

Depending on your system, you might need to run this command using `sudo` because it will install the package globally. The `angular-cli` package provides the `ng` command that is used to manage Angular applications. Once installed go to a directory of your choice and create your first Angular application using the following command.

```bash
ng new MyAngularClient

```

Using Angular 7, this will prompt you with two queries. The first asks you if you want to include routing. Answer **yes** to this. The second query relates to the type of style sheets you want to use. Leave this at the default **CSS**.

`ng new` will create a new directory called `MyAngularClient` and populate it with an application skeleton. Let’s take a bit of time to look at some of the files that the previous command created. At the `src` directory of the app, you will find a file `index.html` that is the main page of the application. It doesn’t contain much and simply plays the role of a container. You will also see a `style.css` file. This contains the global style sheet that is applied throughout the application. If you browse through the folders you might notice a directory `src/app` containing five files.

```
app-routing.module.ts
app.component.css
app.component.html
app.component.ts
app.component.spec.ts
app.module.ts

```

These files define the main application component that will be inserted into the `index.html`. Here is a short description of each of the files:

- `app.component.css` file contains the style sheets of the main `app` component. Styles can be defined locally for each component
- `app.component.html` contains the HTML template of the component
- `app.component.ts` file contains the code controlling the view
- `app.module.ts` defines which modules your app will use
- `app-routing.module.ts` is set up to define the routes for your application
- `app.component.spec.ts` contains a skeleton for unit testing the `app` component

I will not be covering testing in this tutorial, but in real life applications, you should make use of this feature. Before you can get started, you will need to install a few more packages. These will help you to quickly create a nicely designed responsive layout. Navigate to the base directory of the client, `MyAngularClient`, and type the following command.

```bash
npm i @angular/material@7.0.2 @angular/cdk@7.0.2 @angular/animations@7.0.1 @angular/flex-layout@7.0.0-beta.19

```

The `@angular/material` and `@angular/cdk` libraries provide components based on Google’s Material Design, `@angular/animations` is used to provide smooth transitions, and `@angular/flex-layout` gives you the tools to make your design responsive.

Next, create the HTML template for the `app` component. Open `src/app/app.component.html` and replace the content with the following.

```html
<mat-toolbar color="primary" class="expanded-toolbar">
  <button mat-button routerLink="/">{{title}}</button>

  <div fxLayout="row" fxShow="false" fxShow.gt-sm>
    <button mat-button routerLink="/"><mat-icon>home</mat-icon></button>
    <button mat-button routerLink="/products">Products</button>
    <button mat-button *ngIf="!isAuthenticated" (click)="login()"> Login </button>
    <button mat-button *ngIf="isAuthenticated" (click)="logout()"> Logout </button>
  </div>
  <button mat-button [mat-menu-trigger-for]="menu" fxHide="false" fxHide.gt-sm>
    <mat-icon>menu</mat-icon>
  </button>
</mat-toolbar>
<mat-menu x-position="before" #menu="matMenu">
  <button mat-menu-item routerLink="/"><mat-icon>home</mat-icon> Home</button>
  <button mat-menu-item routerLink="/products">Products</button>;
  <button mat-menu-item *ngIf="!isAuthenticated" (click)="login()"> Login </button>
  <button mat-menu-item *ngIf="isAuthenticated" (click)="logout()"> Logout </button>
</mat-menu>
<router-outlet></router-outlet>

```

The `mat-toolbar` contains the material design toolbar, whereas `router-outlet` is the container that will be filled by the router. The `app.component.ts` file should be edited to contain the following.

```ts
import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  public title = 'My Angular App';
  public isAuthenticated: boolean;

  constructor() {
    this.isAuthenticated = false;
  }

  login() {
  }

  logout() {
  }
}

```

This is the controller for the `app` component. You can see that it contains a property called `isAuthenticated` together with two methods `login` and `logout`. At the moment these don’t do anything. They will be implemented in the next section which covers user authentication with Okta. Now define all the modules you will be using. Replace the contents of `app.module.ts` with the code below:

```ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { FlexLayoutModule } from '@angular/flex-layout';
import {
  MatButtonModule,
  MatDividerModule,
  MatIconModule,
  MatMenuModule,
  MatProgressSpinnerModule,
  MatTableModule,
  MatToolbarModule
} from '@angular/material';
import { HttpClientModule } from '@angular/common/http';
import { FormsModule } from '@angular/forms';

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    AppRoutingModule,
    BrowserModule,
    BrowserAnimationsModule,
    HttpClientModule,
    FlexLayoutModule,
    MatToolbarModule,
    MatMenuModule,
    MatIconModule,
    MatButtonModule,
    MatTableModule,
    MatDividerModule,
    MatProgressSpinnerModule,
    FormsModule,
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

```

Notice all the material design modules. The `@angular/material` library requires you to import a module for each type of component you wish to use in your app. Starting with Angular 7, the default application skeleton contains a separate file called `app-routing.module.ts`. Edit this to declare the following routes.

```ts
import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { ProductsComponent } from './products/products.component';
import { HomeComponent } from './home/home.component';

const routes: Routes = [
  {
    path: '',
    component: HomeComponent
  },
  {
    path: 'products',
    component: ProductsComponent
  }
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }

```

This defines two routes corresponding to the root path and to the `products` path. It also attaches the `HomeComponent` and the `ProductsComponent` to these routes. Create these components now. In the base directory of the Angular client, type the following commands.

```bash
ng generate component Products
ng generate component Home

```

This creates `html`, `css`, `ts`, and `spec.ts` files for each component. It also updates `app.module.ts` to declare the new components. Open up `home.component.html` in the `src/app/home` directory and paste the following content.

```html
<div class="hero">
  <div>
    <h1>Hello World</h1>
    <p class="lead">This is the homepage of your Angular app</p>
  </div>
</div>

```

Include some styling in the `home.component.css` file too.

```css
.hero {
  text-align: center;
  height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  font-family: sans-serif;
}

```

Leave the `ProductsComponent` empty for now. This will be implemented once you have created the back-end REST server and are able to fill it with some data. To make everything look beautiful only two little tasks remain. Copy the following styles into `src/style.css`

```css
@import "~@angular/material/prebuilt-themes/deeppurple-amber.css";

body {
  margin: 0;
  font-family: sans-serif;
}

.expanded-toolbar {
  justify-content: space-between;
}

h1 {
  text-align: center;
}

```

Finally, in order to render the Material Design Icons, add one line inside the `<head>` tags of the `index.html` file.

```html
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">

```

You are now ready to fire up the Angular server and see what you have achieved so far. In the base directory of the client app, type the following command.

```bash
ng serve

```

Then open your browser and navigate to `http://localhost:4200`.

## Add Authentication to Your Node + Angular App

If you have ever developed web applications from scratch you will know how much work is involved just to allow users to register, verify, log on and log out of your application. Using Okta this process can be greatly simplified. To start off, you will need a developer account with Okta.

![developer.okta.com](https://developer.okta.com/assets-jekyll/blog/angular-node/developer.okta.com-bd04e258d4735d02eec724bd1f79178cf140cfc8708c521473b6b4a8b5d8696f.png)

In your browser, navigate to [developer.okta.com](https://developer.okta.com/) and click on **Create Free Account** and enter your details.

![Start building on Okta](https://developer.okta.com/assets-jekyll/blog/angular-node/start-building-6f4d161cb1219552c1c41257326f8fbeb89fbcf6ae116e9b29801ea6a20ae762.png)

Once you are done you will be taken to your developer dashboard. Click on the **Add Application** button to create a new application.

![Add Application](https://developer.okta.com/assets-jekyll/blog/angular-node/add-application-ed60bfbd375116e64fc23ba3c85d4b86ae8478a62303194d3a5067adab135109.png)

Start by creating a new single page application. Choose **Single Page App** and click **Next**.

![Create new Single Page App](https://developer.okta.com/assets-jekyll/blog/angular-node/single-page-app-54193ed48ed3e03b9b12a3f8d425c390940cb6b7dfed337d28424045b470915a.png)

On the next page, you will need to edit the default settings. Make sure that the port number is 4200. This is the default port for Angular applications.

![My Angular App](https://developer.okta.com/assets-jekyll/blog/angular-node/my-angular-app-1290784d87169fbcd6e9e9b124efdcc4e5e76efa58f2ccc48f634b7dfca92652.png)

That’s it. You should now see a **Client ID** which you will need to paste into your TypeScript code.

To implement authentication into the client, install the Okta library for Angular.

```bash
npm install @okta/okta-angular@1.0.7 --save-exact

```

In `app.module.ts` import the `OktaAuthModule`.

```ts
import { OktaAuthModule } from '@okta/okta-angular';

```

In the list of `imports` of the `app` module, add:

```ts
OktaAuthModule.initAuth({
  issuer: 'https://{yourOktaDomain}/oauth2/default',
  redirectUri: 'http://localhost:4200/implicit/callback',
  clientId: '{YourClientId}'
})

```

Here `yourOktaDomain` should be replaced by the development domain you see in your browser when you navigate to your Okta dashboard. `YourClientId` has to be replaced by the client ID that you obtained when registering your application. The code above makes the Okta Authentication Module available in your application. Use it in `app.component.ts`, and import the service.

```ts
import { OktaAuthService } from '@okta/okta-angular';

```

Modify the constructor to inject the service and subscribe to it.

```ts
constructor(public oktaAuth: OktaAuthService) {
  this.oktaAuth.$authenticationState.subscribe(
    (isAuthenticated: boolean) => this.isAuthenticated = isAuthenticated
  );
}

```

Now, any changes in the authentication status will be reflected in the `isAuthenticated` property. You will still need to initialize it when the component is loaded. Create a `ngOnInit` method and add `implements OnInit` to your class definition

```ts
import { Component, OnInit } from '@angular/core';
...
export class AppComponent implements OnInit {
  ...
  async ngOnInit() {
    this.isAuthenticated = await this.oktaAuth.isAuthenticated();
  }
}

```

Finally, implement the `login` and `logout` method to react to the user interface and log the user in or out.

```ts
login() {
  this.oktaAuth.loginRedirect();
}

logout() {
  this.oktaAuth.logout('/');
}

```

In the routing module, you need to register the route that will be used for the login request. Open `app-routing.module.ts` and import `OktaCallbackComponent` and `OktaAuthGuard`.

```ts
import { OktaCallbackComponent, OktaAuthGuard } from '@okta/okta-angular';

```

Add another route to the `routes` array.

```ts
{
  path: 'implicit/callback',
  component: OktaCallbackComponent
}

```

This will allow the user to log in using the **Login** button. To protect the `Products` route from unauthorized access, add the following line to the `products` route.

```ts
{
  path: 'products',
  component: ProductsComponent,
  canActivate: [OktaAuthGuard]
}

```

That’s all there is to it. Now, when a user tries to access the Products view, they will be redirected to the Okta login page. Once logged on, the user will be redirected back to the Products view.

## Implement a Node REST API

The next step is to implement a server based on Node and Express that will store product information. This will use a number of smaller libraries to make your life easier. To develop in TypeScript, you’ll need `typescript` and `tsc`. For the database abstraction layer, you will be using **TypeORM**. This is a convenient library that injects behavior into TypeScript classes and turns them into database models. Create a new directory to contain your server application, then run the following command in it.

```bash
npm init

```

Answer all the questions, then run:

```bash
npm install --save-exact express@4.16.4 @types/express@4.16.0 @okta/jwt-verifier@0.0.14 express-bearer-token@2.2.0 tsc@1.20150623.0 typescript@3.1.3 typeorm@0.2.8 sqlite3@4.0.3 cors@2.8.4 @types/cors@2.8.4

```

I will not cover all these libraries in detail, but you will see that `@okta/jwt-verifier` is used to verify JSON Web Tokens and authenticate them.

In order to make TypeScript work, create a file `tsconfig.json` and paste in the following content.

```json
{
  "compilerOptions": {
    "target": "es6",
    "module": "commonjs",
    "outDir": "dist",
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true
  },
  "include": [
    "src/**/*.ts"
  ],
  "exclude": [
    "node_modules"
  ]
}

```

The first step in creating the server is to create a database model for the product. Using TypeORM this is straightforward. Create a subdirectory `src` and inside that create a file `model.ts`. Paste the following content.

```ts
import {Entity, PrimaryGeneratedColumn, Column, createConnection, Connection, Repository} from 'typeorm';

@Entity()
export class Product {
  @PrimaryGeneratedColumn()
  id: number;

  @Column()
  name: string;

  @Column()
  sku: string;

  @Column('text')
  description: string;

  @Column()
  price: number;

  @Column()
  stock: number;
}

```

The TypeORM annotations turn the class definition into a database model. I love the TypeORM project because of its ease of use and the wide variety of SQL and NoSQL database connectors that are supported. I suggest that you check out the documentation at [https://github.com/typeorm/typeorm](https://github.com/typeorm/typeorm).

You will also need to get access to a repository of product. Also in the `model.ts` file add the following.

```ts
let connection:Connection;

export async function getProductRepository(): Promise<Repository<Product>> {
  if (connection===undefined) {
    connection = await createConnection({
      type: 'sqlite',
      database: 'myangularapp',
      synchronize: true,
      entities: [
        Product
      ],
    });
  }
  return connection.getRepository(Product);
}

```

Note that this uses SQLite for simplicity here. In a real-world scenario, you should replace this with a database connector of your choice.

Next, create a file called `product.ts`. This file will contain the logic for all the routes for the CRUD operations on Products.

```ts
import { NextFunction, Request, Response, Router } from 'express';
import { getProductRepository, Product } from './model';

export const router: Router = Router();

router.get('/product', async function (req: Request, res: Response, next: NextFunction) {
  try {
    const repository = await getProductRepository();
    const allProducts = await repository.find();
    res.send(allProducts);
  }
  catch (err) {
    return next(err);
  }
});

router.get('/product/:id', async function (req: Request, res: Response, next: NextFunction) {
  try {
    const repository = await getProductRepository();
    const product = await repository.find({id: req.params.id});
    res.send(product);
  }
  catch (err) {
    return next(err);
  }
});

router.post('/product', async function (req: Request, res: Response, next: NextFunction) {
  try {
    const repository = await getProductRepository();
    const product = new Product();
    product.name = req.body.name;
    product.sku = req.body.sku;
    product.description = req.body.description;
    product.price = Number.parseFloat(req.body.price);
    product.stock = Number.parseInt(req.body.stock);

    const result = await repository.save(product);
    res.send(result);
  }
  catch (err) {
    return next(err);
  }
});

router.post('/product/:id', async function (req: Request, res: Response, next: NextFunction) {
  try {
    const repository = await getProductRepository();
    const product = await repository.findOne({id: req.params.id});
    product.name = req.body.name;
    product.sku = req.body.sku;
    product.description = req.body.description;
    product.price = Number.parseFloat(req.body.price);
    product.stock = Number.parseInt(req.body.stock);

    const result = await repository.save(product);
    res.send(result);
  }
  catch (err) {
    return next(err);
  }
});

router.delete('/product/:id', async function (req: Request, res: Response, next: NextFunction) {
  try {
    const repository = await getProductRepository();
    await repository.delete({id: req.params.id});
    res.send('OK');
  }
  catch (err) {
    return next(err);
  }
});

```

This file is somewhat lengthy but does not contain anything surprising. `Product` objects are created and saved into or deleted from the database.

Let’s turn our attention to authentication again. You will want to make sure that only authenticated users can access the service. Create a file called `auth.ts` and paste the following.

```ts
import { Request, Response, NextFunction} from 'express';

const OktaJwtVerifier = require('@okta/jwt-verifier');

const oktaJwtVerifier = new OktaJwtVerifier({
  clientId: '{YourClientId}',
  issuer: 'https://{yourOktaDomain}/oauth2/default'
});

export async function oktaAuth(req:Request, res:Response, next:NextFunction) {
  try {
    const token = (req as any).token;
    if (!token) {
      return res.status(401).send('Not Authorised');
    }
    const jwt = await oktaJwtVerifier.verifyAccessToken(token);
    req.user = {
      uid: jwt.claims.uid,
      email: jwt.claims.sub
    };
    next();
  }
  catch (err) {
    return res.status(401).send(err.message);
  }
}

```

Just as in the client application `yourOktaDomain` should be replaced by the development domain and `YourClientId` has to be replaced by your application client ID. The `oktaJwtVerifier` instance takes a JWT token and authenticates it. If successful, the user id and email will be stored in `req.user`. Otherwise, the server will respond with a 401 status code. The final piece to complete the server is the main entry point that actually starts the server and registers the middleware you have defined so far. Create a file `server.ts` with the following content.

```ts
import * as express from 'express';
import * as cors from 'cors';
import * as bodyParser from 'body-parser';
const bearerToken = require('express-bearer-token');
import {router as productRouter} from './product'
import {oktaAuth} from './auth'

const app = express()
  .use(cors())
  .use(bodyParser.json())
  .use(bearerToken())
  .use(oktaAuth)
  .use(productRouter);

app.listen(4201, (err) => {
  if (err) {
    return console.log(err);
  }

  return console.log('My Node App listening on port 4201');
});

```

To compile the TypeScript run the command

```bash
npx tsc

```

Then, if you want to start the server, simply run:

```bash
node dist/server.js

```

## Finish Your Angular Client

Now that the server is complete let’s finish off the client. The first step is to create a class that contains the Product data. This class is similar to the `Product` class in the server application but without the TypeORM annotations. It will be contained in a file called `product.ts`.

```ts
export class Product {
  id?: string;
  name: string;
  sku: string;
  description: string;
  price: number;
  stock: number;
}

```

Save this file in the same directory as the `products` component. It is best to encapsulate the access to the REST API in a separate service. Create a `Products` service by running the command below.

```bash
ng generate service products/Products

```

This will create a file called `product.service.ts` in the `src/app/products` directory. Fill it with the following content.

```ts
import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { OktaAuthService } from '@okta/okta-angular';
import { Product } from './product';

const baseUrl = 'http://localhost:4201';

@Injectable({
  providedIn: 'root'
})
export class ProductsService {

  constructor(public oktaAuth: OktaAuthService, private http: HttpClient) {
  }

  private async request(method: string, url: string, data?: any) {
    const token = await this.oktaAuth.getAccessToken();

    console.log('request ' + JSON.stringify(data));
    const result = this.http.request(method, url, {
      body: data,
      responseType: 'json',
      observe: 'body',
      headers: {
        Authorization: `Bearer ${token}`
      } 
    });
    return new Promise<any>((resolve, reject) => {
      result.subscribe(resolve as any, reject as any);
    });
  }

  getProducts() {
    return this.request('get', `${baseUrl}/product`);
  }

  getProduct(id: string) {
    return this.request('get', `${baseUrl}/product/${id}`);
  }

  createProduct(product: Product) {
    console.log('createProduct ' + JSON.stringify(product));
    return this.request('post', `${baseUrl}/product`, product);
  }

  updateProduct(product: Product) {
    console.log('updateProduct ' + JSON.stringify(product));
    return this.request('post', `${baseUrl}/product/${product.id}`, product);
  }

  deleteProduct(id: string) {
    return this.request('delete', `${baseUrl}/product/${id}`);
  }
}

```

The `ProductsService` contains one public method for each route of the REST API. The HTTP request is encapsulated in a separate method. Note how the request always contains a `Bearer` token obtained from the `OktaAuthService`. This is the token used by the server to authenticate the user.

Now the `ProductsComponent` can be implemented. The following code will do the trick.

```ts
import { Component, OnInit } from '@angular/core';
import { MatTableDataSource } from '@angular/material';
import { ProductsService } from './products.service';
import { Product } from './product';

@Component({
  selector: 'app-products',
  templateUrl: './products.component.html',
  styleUrls: ['./products.component.css']
})
export class ProductsComponent implements OnInit {
  displayedColumns: string[] = ['name', 'sku', 'description', 'price', 'stock', 'edit', 'delete'];
  dataSource = new MatTableDataSource<any>();

  selectedProduct: Product = new Product();
  loading = false;

  constructor(public productService: ProductsService) {
  }

  ngOnInit() {
    this.refresh();
  }

  async refresh() {
    this.loading = true;
    const data = await this.productService.getProducts();
    this.dataSource.data = data;
    this.loading = false;
  }

  async updateProduct() {
    if (this.selectedProduct.id !== undefined) {
      await this.productService.updateProduct(this.selectedProduct);
    } else {
      await this.productService.createProduct(this.selectedProduct);
    }
    this.selectedProduct = new Product();
    await this.refresh();
  }

  editProduct(product: Product) {
    this.selectedProduct = product;
  }

  clearProduct() {
    this.selectedProduct = new Product();
  }

  async deleteProduct(product: Product) {
    this.loading = true;
    if (confirm(`Are you sure you want to delete the product ${product.name}. This cannot be undone.`)) {
      this.productService.deleteProduct(product.id);
    }
    await this.refresh();
  }
}

```

The layout, in `products.component.html`, showing the product consists of two parts. The first part uses a `mat-table` component to display a list of products. The second part shows a form in which the user can edit a new or existing product.

```html
<h1 class="h1">Product Inventory</h1>
<div fxLayout="row" fxLayout.xs="column" fxLayoutAlign="space-between stretch" class="products">
  <table mat-table fxFlex="100%" fxFlex.gt-sm="66%" [dataSource]="dataSource" class="mat-elevation-z1">
    <ng-container matColumnDef="name">
      <th mat-header-cell *matHeaderCellDef> Name</th>
      <td mat-cell *matCellDef="let product"> {{product.name}}</td>
    </ng-container>
    <ng-container matColumnDef="sku">
      <th mat-header-cell *matHeaderCellDef> SKU</th>
      <td mat-cell *matCellDef="let product"> {{product.sku}}</td>
    </ng-container>
    <ng-container matColumnDef="description">
      <th mat-header-cell *matHeaderCellDef> Description</th>
      <td mat-cell *matCellDef="let product"> {{product.description}}</td>
    </ng-container>
    <ng-container matColumnDef="price">
      <th mat-header-cell *matHeaderCellDef> Price</th>
      <td mat-cell *matCellDef="let product"> {{product.price}}</td>
    </ng-container>
    <ng-container matColumnDef="stock">
      <th mat-header-cell *matHeaderCellDef> Stock Level</th>
      <td mat-cell *matCellDef="let product"> {{product.stock}}</td>
    </ng-container>
    <ng-container matColumnDef="edit">
      <th mat-header-cell *matHeaderCellDef></th>
      <td mat-cell *matCellDef="let product">
        <button mat-icon-button (click)="editProduct(product)">
          <mat-icon>edit</mat-icon>
        </button>
      </td>
    </ng-container>
    <ng-container matColumnDef="delete">
      <th mat-header-cell *matHeaderCellDef></th>
      <td mat-cell *matCellDef="let product">
        <button mat-icon-button (click)="deleteProduct(product)">
          <mat-icon>delete</mat-icon>
        </button>
      </td>
    </ng-container>
    <tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
    <tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
  </table>
  <mat-divider fxShow="false" fxShow.gt-sm [vertical]="true"></mat-divider>
  <div>
    <h2>Selected Product</h2>
    <label>Name
      <input type="text" [(ngModel)]="selectedProduct.name">
    </label>
    <label>SKU
      <input type="text" [(ngModel)]="selectedProduct.sku">
    </label>
    <label>Description
      <input type="text" [(ngModel)]="selectedProduct.description">
    </label>
    <label>Price
      <input type="text" [(ngModel)]="selectedProduct.price">
    </label>
    <label>Stock Level
      <input type="text" [(ngModel)]="selectedProduct.stock">
    </label>
    <button mat-flat-button color="primary" (click)="updateProduct()">{{(selectedProduct.id!==undefined)?'Update':'Create'}}</button>
    <button mat-flat-button color="primary" (click)="clearProduct()">Clear</button>
  </div>
  <div class="loading" *ngIf="loading">
    <mat-spinner></mat-spinner>
  </div>
</div>

```

Finally, add a bit of styling in `products.component.css` to the layout.

```css
.products {
  padding: 2rem;
}

label, input {
  display: block;
}

label {
  margin-bottom: 1rem;
}

.loading {
  position: absolute;
  display: flex;
  justify-content: center;
  align-content: center;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.8);
}

```

When all is done, you can start the client and the server up and test your application. Just to repeat, in the directory containing the server, run:

```bash
node dist/server.js

```

And in the client directory, run:

```bash
ng serve

```

Your application should look somewhat like the following

![Product Inventory](https://developer.okta.com/assets-jekyll/blog/angular-node/product-inventory-7d59ff869e57a8f2ccff80171940dc00812918d6dfc526c331110f2a1ebedadc.png)

## Learn more About Angular, Node, and Express

In this tutorial, I have guided you through the development of a single page web application using Angular and Node. Using just a few lines of code you were able to implement user authentication for the client and the server. Angular makes use of TypeScript which is a superset of the JavaScript language and adds type information. TypeScript makes for more stable code and that is why I decided to also implement the Node/Express server using this language. If you are not yet familiar with TypeScript, check out this [great introduction by Todd Motto](https://toddmotto.com/typescript-introduction). He also has some good articles on Angular.

The complete code of this tutorial can be found [on GitHub](https://github.com/oktadeveloper/okta-angular-node-example).

If you’re ready to learn more about Angular, or Node/Express, we have some other resources for you to check out:

- [Simple Node Authentication](/blog/2018/04/24/simple-node-authentication)
- [Build a Basic CRUD App with Node and React](/blog/2018/07/10/build-a-basic-crud-app-with-node-and-react)
- [Build a Simple API Service with Express and GraphQL](/blog/2018/09/27/build-a-simple-api-service-with-express-and-graphql)
- [Angular 6 - What’s New and Why Upgrade?](/blog/2018/05/09/upgrade-to-angular-6)
- [Build a Basic CRUD App with Angular 7 and Spring Boot](/blog/2018/08/22/basic-crud-angular-7-and-spring-boot-2)

And as always, we’d love to have you follow us for more cool content and updates from our team. You can find us on Twitter [@oktadev](https://twitter.com/OktaDev), on [Facebook](https://www.facebook.com/oktadevelopers/), and [LinkedIn](https://www.linkedin.com/company/oktadev/).