Refference Example: https://www.freakyjolly.com/angular-12-crud-example-with-web-api-httpclient-rest-apis/#Install_json-server

1.Start mock server

Finally, run the mock server in new CLI instance with json file specified using below command

$ json-server --watch ./src/app/data.json

2.Serve or Run Application in the Browser

ng serve or ng serve –open

AngularCrudApp

This project was generated with Angular CLI version 12.2.11.

Development server

Run ng serve for a dev server. Navigate to http://localhost:4200/. The app will automatically reload if you change any of the source files.

Code scaffolding

Run ng generate component component-name to generate a new component. You can also use ng generate directive|pipe|service|class|guard|interface|enum|module.

Build

Run ng build to build the project. The build artifacts will be stored in the dist/ directory.

Running unit tests

Run ng test to execute the unit tests via Karma.

Running end-to-end tests

Run ng e2e to execute the end-to-end tests via a platform of your choice. To use this command, you need to first add a package that implements end-to-end testing capabilities.

Further help

To get more help on the Angular CLI use ng help or go check out the Angular CLI Overview and Command Reference page.