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NX micro-frontend setup guide

This guide will provides step by step to build a web micro-frontend application structured with NX workspace. There are two different templates. One for application and one for library. Your project will most likely be splitted into multiple workspaces that are managed by different team building up their own micro-frontend applications and libraries to interface with the host.

Setup environment

Refers to the Environment documentation to ensure you have the correct toolchain installed before carrying out this guide.

Create your library

Initialize the workspace

We will use the create-nx-workspace package to generate the workspace. Refers to the NX website for additional information.

npx create-nx-workspace mylib --name MyLib --style scss --preset core --nxCloud false --skipGit true --ci github

TIP: Run the command without arguments to have the interactive mode on.

TIP: Using something like @MyOrg/MyLib as first parameter will create a nested folder structure, but the application name wil be MyLib.

Scaffold the library

Architecturing a micro-frontend is no more different than any other application. As such, we can create libraries that will be componsed of services, model, api (interfaces) and even components.

To create the host application and optional libraries specific to the application, We will use the @nrwl/angular nx plugin generator.

First, install the NX angular generator plugin.

npm install @nrwl/angular@13 -D

Once the angular plugin is installed, we can generate the library.

nx g @nrwl/angular:lib SomeLib --prefix=portal-somelib --importPath=@portal/somelib --publishable --strict

TIP: Add --dry-run to validate the options will generate what´d you expect.

TIP: run nx g rm SomeLib to remove the application or library.

Create first service

To add a service within the newly created MyLib library. run the following commmand.

nx g @nrwl/angular:service MyService --project=portal-somelib

Once the service has been added, ensure to add it to the provider section of your library module as well as to the index or public-api file to ensure your service is accessible when referenced by other applications or libraries.

Create first component

To add a componet within the newly created MyLib library. run the following commmand.

nx g @nrwl/angular:component MyComponent --project=portal-somelib

Once the component has been added, ensure to add it to the declaration and export sections of your library module as well as to the index or public-api file to ensure your component is accessible when referenced by other applications or libraries.

Setup Pre-commit validation

While working alone or in a team, it is good practice to setup pre-commit validation of the code and commit message. This ensure that your project has constant buildable codebase and consistant commit. The Git Hooks guide will help you to set that up.

Setup CI / CD

Different team uses different process adapted for their needs, but typically, you will have some sort of SDLC that include Brnaching and Pull request. Following this workflow, you will most likely use also Continuous integration and in case you don´t, then you should !

The following guide will helps you setup a CI / CD pipeline with Github actions. Refers to github for more information if this doesn´t fit your needs.

Packages upgrade

From time to time, you will need to update / upgrade your packages to a newer version due to security fixes, support changes or new features adoption. The Packages migration guide provides exemples of commands to upgrade the workspace, runtime and dev packages.

Wants to learn mode ?

While this guide is tailored for our needs, this is based on many good blog articles and tools documentation listed in a Reading list.

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