Throughout this tutorial, we’ll be learning how to build an Angular 11 CRUD application with Bootstrap 4 styles to consume a REST Web API, create, read, modify, and search data.
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We will learn how to build an Angular 11 front-end application that fetches data from a REST API of products:
- Each product has id, name, description, availability status.
- Users would be able to create, retrieve, update, and delete products.
- Users can search for products by name.
We’ll be building a Angular 11 frontend app for a presumed REST API exporting the following REST API endpoints:
- POST /api/products create new product
- GET /api/products retrieve all products
- GET /api/products/:id retrieve a product by
- PUT /api/products/:id update a product by
- DELETE /api/products/:id delete a product by
- DELETE /api/products delete all products
- GET /api/products?name=[keyword] find all products which name contains the passed
All of them can work well with this Angular App.
These are the components of our CRUD app:
Appcomponent is the parent of all other components and contains a
router-outletdirective where the router will be inserting any matched component. It also contains a navigation bar that contains links to the app routes using
ProductListComponent which displays the list of products.
ProductUpdateComponent which displays a form for editing product’s details by
ProductCreateComponent which displays a form for creating a new product.
The components use the
ProductService methods for actually making CRUD operations against the REST API. The service makes use of Angular 11
HTTPClient to send HTTP requests to the REST and process responses.
Let’s get started by generating a new Angular 11 project using the CLI. You need to run the following command:
$ ng new Angular11CRUDExample
The CLI will ask you a couple of questions — If Would you like to add Angular routing? Type y for Yes and Which stylesheet format would you like to use? Choose CSS.
Next, we need to generate a bunch of components and a service using the Angular CLI as follows:
$ ng generate service services/product
$ ng g c components/product-create
$ ng g c components/product-details
$ ng g c components/product-list
We have generated three components
product-create and a product service that provides the necessary methods for sending HTTP requests to the server.
We also have the following artifacts:
src/app/app-routing.module.ts module will contain routes for each component. This file is automatically generated by Angular CLI when you answered Yes for routing. – The
App component contains the router view and navigation bar.
src/app/app.module.ts module declares our Angular components and import the necessary modules such Angular
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