Like any kind of apps, JavaScript apps also have to be written well.

Otherwise, we run into all kinds of issues later on.

In this article, we’ll look at some best practices we should follow when writing Node apps.

Microservices

Microservices architecture is a style that structure apps with a collection of services.

They’re very maintainable and testing.

Also, they’re loosely coupled so they can mostly work on their own.

They’re also independently deployable.

And each service is organized around business requirements.

This architecture lets us do continuous delivery and deployment of large systems.

We can also improve its technology stack in a piecemeal fashion.

If we’re creating a simple app, we probably don’t need microservices.

However, as our system grows, we don’t want to create one complex app that’s hard to maintain and scale.

It makes more sense to have them in individual modules.

Microservices are useful for replacing monolithic apps that are common until container solutions like Docker are commonplace.

We can divide our system into microservices with domains driven design.

Each domain is divided into bounded contexts which are mutually exclusive.

Each context correlates to a microservice.

Our goal is to create a cohesive and loosely coupled domain model.

We can identify the microservices we need by analyzing our domains, defining the bounded contexts, and define the entities and services.

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