LoopBack project files and directories are in the application root directory. Within this directory the standard LoopBack project structure has three sub-directories:
- server- Node application scripts and configuration files.
- client- Client JavaScript, HTML, and CSS files.
- common- Files common to client and server. The- /modelssub-directory contains all model JSON and JavaScript files.
- definitions- API and product definition YAML files (IBM API Connect only).
Note:
All model JSON and JavaScript files that are shared between client and server go in the /common/models directory.  Server-only files go in /server/models, and client-only go in/client/models
| File or directory | Description | How to access in code | 
|---|---|---|
| Top-level application directory | ||
| /node-modulesdirectory | Contains Node packages as specified as dependencies in package.json. Update withnpm install. | N/A | 
| Standard npm package specification. See package.json. | N/A | |
| README.md | Stub file for internal documentation. | N/A | 
| /server directory - Node application files | ||
| /bootdirectory | Add scripts to perform initialization and setup. See boot scripts. | Scripts are automatically executed in alphabetical order. | 
| component-config.json | Specifies LoopBack components to load. | Created by Strongloop tools only. Not used in API Connect. | 
| config.json | Application settings. See config.json. | app.get('setting-name') | 
| datasources.json | Data source configuration file. See datasources.json. For an example, see Create new data source. | app.datasources['datasource-name'] | 
| middleware.json | Middleware definition file. For more information, see Defining middleware. | N/A | 
| middleware.production.json | Middleware definition file with production configuration. See Preparing for deployment. | |
| model-config.json | Model configuration file. See model-config.json. For more information, see Connecting models to data sources. | N/A | 
| server.js | Main application program file. | N/A | 
| /client directory - Client application files | ||
| README.md | LoopBack generators create empty README.mdfile. | N/A | 
| Other | Add your HTML, CSS, client JavaScript files. | |
| /common directory - shared application files | ||
| /modelsdirectory | Custom model files: 
 For more information, see Model definition JSON file and Customizing models.  See note below. | Node: | 
Important:
The LoopBack model generator
automatically converts camel-case model names (for example MyModel) to lowercase dashed names (my-model).
For example, if you create a model named “FooBar” with the model generator, it creates files foo-bar.json and foo-bar.js in common/models.
However, the model name (“FooBar”) will be preserved via the model’s name property.