project-structure.md

🗄️ Project Structure

Most of the code lives in the src folder and looks like this:

src
|
+-- assets            # assets folder can contain all the static files such as images, fonts, etc.
|
+-- components        # shared components used across the entire application
|
+-- config            # all the global configuration, env variables etc. get exported from here and used in the app
|
+-- features          # feature based modules
|
+-- hooks             # shared hooks used across the entire application
|
+-- lib               # re-exporting different libraries preconfigured for the application
|
+-- providers         # all of the application providers
|
+-- routes            # routes configuration
|
+-- stores            # global state stores
|
+-- test              # test utilities and mock server
|
+-- types             # base types used accross the application
|
+-- utils             # shared utility functions

In order to scale the application in the easiest and most maintainable way, keep most of the code inside the features folder, which should contain different feature-based things. Every feature folder should contain domain specific code for a given feature. This will allow you to keep functionalities scoped to a feature and not mix its declarations with shared things. This is much easier to maintain than a flat folder structure with many files.

A feature could have the following structure:

src/features/awesome-feature
|
+-- api         # exported API request declarations and api hooks related to a specific feature
|
+-- assets      # assets folder can contain all the static files for a specific feature
|
+-- components  # components scoped to a specific feature
|
+-- hooks       # hooks scoped to a specific feature
|
+-- routes      # route components for a specific feature pages
|
+-- stores      # state stores for a specific feature
|
+-- types       # typescript types for TS specific feature domain
|
+-- utils       # utility functions for a specific feature
|
+-- index.ts    # entry point for the feature, it should serve as the public API of the given feature and exports everything that should be used outside the feature

A feature folder could also contain other features (if used only within the parent feature) or be kept separated, it's a matter of preference.

Everything from a feature should be exported from the index.ts file which behaves as the public API of the feature.

You should import stuff from other features only by using:

import {AwesomeComponent} from "@/features/awesome-feature"

and not

import {AwesomeComponent} from "@/features/awesome-feature/components/AwesomeComponent

This can also be configured in the ESLint configuration to disallow the later import by the following rule:

{
    rules: {
        'no-restricted-imports': [
            'error',
            {
                patterns: ['@/features/*/*'],
            },
        ],

    // ...rest of the configuration
}

This was inspired by how NX handles libraries that are isolated but available to be used by the other modules. Think of a feature as a library or a module that is self-contained but can expose different parts to other features via its entry point.