Angular-in-memory-web-api Tutorial: Mocking CRUD APIs in Angular

Angular-in-memory-web-api Tutorial: Mocking CRUD APIs in Angular

Learn how to use Angular's in-memory-web-api to make a simple CRUD server, and create a functional frontend without backend assistance. Angular-in-memory-web-api is a library that intercepts Angular Http and HttpClient requests that would otherwise go to the remote server and redirects them to an in-memory data store that you control in the frontend.

Learn how to use Angular's in-memory-web-api to make a simple CRUD server, and create a functional frontend without backend assistance.

Introduction

Imagine a situation in which you are building a new feature on the frontend of an application, but the available HTTP endpoints are not yet ready for consumption from the backend development team. This is a common problem when working inside a large team of various types of developers. To overcome this obstacle during development, we can use a fake server to mimic all CRUD operations of an HTTP REST API while our data resides locally in our frontend application.

In this tutorial, we’re going to explore the Angular-in-memory-web-api, followed by a hands-on development of a fake server to mock a simple CRUD backend in Angular, so you can build a functional frontend without depending on the backend team.

Prerequisites

Before we get started, make sure you have the following in order to keep up with this tutorial:

  • Node.js V10.x
  • Prior working knowledge of Angular
  • Prior working knowledge of TypeScript

Introducing the Angular-in-memory-web-api

Angular-in-memory-web-api is a library that intercepts Angular Http and HttpClient requests that would otherwise go to the remote server and redirects them to an in-memory data store that you control in the frontend. With this library, you can seamlessly mimic delayed responses and do essentially everything you might need from a backend developer. However, it has limited capabilities, and it is not intended for use in production.

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