# loopbackio/loopback-next

**Attribution required: if you use, quote, or summarise this content, you must credit and link back to [awesome-repositories.com](https://awesome-repositories.com/repository/loopbackio-loopback-next).**

5,095 stars · 1,061 forks · TypeScript · NOASSERTION

## Links

- GitHub: https://github.com/loopbackio/loopback-next
- Homepage: https://loopback.io
- awesome-repositories: https://awesome-repositories.com/repository/loopbackio-loopback-next.md

## Description

LoopBack Next is a Node.js API framework used for building REST and multi-protocol APIs. It functions as an OpenAPI server implementation that can either generate machine-readable specifications from code or produce implementation controllers and models from existing specifications.

The framework distinguishes itself through a central dependency injection container and a repository-pattern data access layer. This architecture decouples application logic from component construction and persistent storage, allowing for a pluggable system where data sources and business logic are isolated through a standardized connector system.

The project covers a broad range of capabilities including role-based access control with pluggable authentication strategies and the orchestration of external REST and SOAP services. It also provides tools for real-time communication via WebSocket endpoints, JSON schema validation, and automated project scaffolding through a command-line interface.

Development is supported by a set of CLI tools for bootstrapping applications, generating API components, and managing project dependencies.

## Tags

### Software Engineering & Architecture

- [Dependency Injection Containers](https://awesome-repositories.com/f/software-engineering-architecture/dependency-injection-containers.md) — Maps unique keys to classes or factory functions to decouple component creation from usage. ([source](https://loopback.io/doc/en/lb4/Binding.html))
- [Dependency Injection](https://awesome-repositories.com/f/software-engineering-architecture/integration-extensibility/dependency-injection.md) — Decouples class construction from behavior by resolving dependencies through a central global registry. ([source](https://loopback.io/doc/en/lb4/Concepts.html))
- [Application Bootstrapping](https://awesome-repositories.com/f/software-engineering-architecture/application-bootstrapping.md) — Coordinates the startup of components, servers, and bindings to establish the application runtime environment. ([source](https://loopback.io/doc/en/lb4/Application.html))
- [Data Access Layers](https://awesome-repositories.com/f/software-engineering-architecture/data-access-layers.md) — Provides an abstraction layer that standardizes communication between application logic and various backend data sources.
- [Database Abstraction Layers](https://awesome-repositories.com/f/software-engineering-architecture/database-abstraction-layers.md) — Implements a repository pattern to decouple business logic from specific database implementations.
- [Dependency Bindings](https://awesome-repositories.com/f/software-engineering-architecture/dependency-bindings.md) — Registers specific classes or providers to a central context to control component injection. ([source](https://loopback.io/doc/en/lb4/Configuring-applications.html))
- [Dependency-Injected Contexts](https://awesome-repositories.com/f/software-engineering-architecture/dependency-injected-contexts.md) — Provides mechanisms for resolving dependencies at runtime using a hierarchy of global and request-scoped bindings.
- [Bi-Directional Specification Mapping](https://awesome-repositories.com/f/software-engineering-architecture/openapi-specification-parsers/go-code-generators/specification-from-code-generators/bi-directional-specification-mapping.md) — Enables automatic generation of OpenAPI specifications from code and the production of controllers from existing specifications.
- [Request-Scoped Configurations](https://awesome-repositories.com/f/software-engineering-architecture/software-architecture/architectural-patterns/layering-presentation/application-layer-architectures/state-management-architectures/scope-and-hierarchy-management/hierarchical-scopes/scope-selector-configurations/configuration-scope-hierarchies/request-scoped-configurations.md) — Allows defining whether components are shared as singletons or created uniquely for each execution request. ([source](https://loopback.io/doc/en/lb4/Binding.html))
- [API Logic Generators](https://awesome-repositories.com/f/software-engineering-architecture/component-port-definitions/cli-component-generators/api-logic-generators.md) — Creates controllers, models, and services using guided prompts to build application logic quickly. ([source](https://loopback.io/doc/en/lb4/Command-line-interface.html))
- [Convention-Based Configuration](https://awesome-repositories.com/f/software-engineering-architecture/convention-based-configuration.md) — Automatically discovers and binds controllers and models into the application context based on directory and file naming patterns.
- [Runtime Value Resolvers](https://awesome-repositories.com/f/software-engineering-architecture/default-configuration-values/configuration-value-resolvers/runtime-value-resolvers.md) — Calculates binding values at runtime using factory functions that access the current execution context. ([source](https://loopback.io/doc/en/lb4/Binding.html))
- [Application Mounts](https://awesome-repositories.com/f/software-engineering-architecture/integration-extensibility/application-integration/application-mounts.md) — Allows mounting secondary sub-applications into a main host application at specific URL paths. ([source](https://loopback.io/doc/en/lb4/Booting-an-Application.html))
- [Method Interception Proxies](https://awesome-repositories.com/f/software-engineering-architecture/method-interception-proxies.md) — Implements dynamic proxy systems to run custom logic before or after class methods for cross-cutting concerns. ([source](https://loopback.io/doc/en/lb4/Concepts.html))
- [Modular Application Composition](https://awesome-repositories.com/f/software-engineering-architecture/modular-application-composition.md) — Implements architectural patterns for mounting independent functional sub-applications into a core host system.
- [Code from Specification Generators](https://awesome-repositories.com/f/software-engineering-architecture/openapi-specification-parsers/go-code-generators/specification-from-code-generators/code-from-specification-generators.md) — Produces implementation controllers and models directly from OpenAPI specifications to ensure design compliance. ([source](https://loopback.io/doc/en/lb4/Command-line-interface.html))
- [Repository Layer Filtering](https://awesome-repositories.com/f/software-engineering-architecture/repository-layer-filtering.md) — Applies asynchronous logic to filter datasets at the repository layer before they reach the controller. ([source](https://loopback.io/doc/en/lb4/Community-extensions.html))
- [Request Interception Middleware](https://awesome-repositories.com/f/software-engineering-architecture/request-interception-middleware.md) — Implements architectural patterns to run custom logic before or after class methods for authorization and error handling.
- [Reusable Component Architectures](https://awesome-repositories.com/f/software-engineering-architecture/reusable-component-architectures.md) — Supports the creation of standardized, independent software modules that can be reused across different projects. ([source](https://loopback.io/doc/en/lb4/))

### Web Development

- [REST API Implementations](https://awesome-repositories.com/f/web-development/rest-api-implementations.md) — Provides a comprehensive framework for implementing server-side RESTful endpoints with standard CRUD semantics. ([source](https://loopback.io/doc/en/lb4/apidocs.index.html))
- [Server-Side REST API Frameworks](https://awesome-repositories.com/f/web-development/restful-api-development/server-side-rest-api-frameworks.md) — Provides a comprehensive server-side framework for building RESTful APIs with standard CRUD semantics. ([source](https://cdn.jsdelivr.net/gh/loopbackio/loopback-next@main/README.md))
- [Node.js Server Frameworks](https://awesome-repositories.com/f/web-development/backend-development/web-frameworks/node-js-server-frameworks.md) — Acts as a specialized architectural framework for building Node.js server applications with multi-protocol support.
- [Controller-Based Endpoints](https://awesome-repositories.com/f/web-development/api-routing/custom-route-definitions/plugin-defined-endpoints/controller-based-endpoints.md) — Defines business-logic controllers to handle incoming HTTP requests and return structured responses. ([source](https://cdn.jsdelivr.net/gh/loopbackio/loopback-next@main/README.md))
- [API Schema Endpoints](https://awesome-repositories.com/f/web-development/api-schema-endpoints.md) — Specifies API endpoints and schemas in a standard format to serve as the single source of truth for the application. ([source](https://loopback.io/doc/en/lb4/))
- [Authentication Middleware](https://awesome-repositories.com/f/web-development/backend-development/web-frameworks/node-js-server-frameworks/authentication-middleware.md) — Connects external authentication middleware and OAuth strategies to validate user identities. ([source](https://loopback.io/doc/en/lb4/Authentication-passport.html))
- [Artifact Auto-Discovery](https://awesome-repositories.com/f/web-development/dynamic-content-resolution/url-route-mapping/artifact-auto-discovery.md) — Automatically scans project directories for controllers and models to bind them into the application context. ([source](https://loopback.io/doc/en/lb4/Booting-an-Application.html))
- [Error Response Mappers](https://awesome-repositories.com/f/web-development/error-response-mappers.md) — Translates internal application errors into standardized HTTP responses to protect sensitive system details. ([source](https://loopback.io/doc/en/lb4/Advanced-sequence-topics.html))
- [External API Integrations](https://awesome-repositories.com/f/web-development/external-api-integrations.md) — Integrates external REST and SOAP services into the application to fetch and exchange remote data. ([source](https://loopback.io/doc/en/lb4/Community-examples.html))
- [External Service Integrations](https://awesome-repositories.com/f/web-development/external-service-integrations.md) — Integrates external REST APIs, SOAP services, and cloud storage to bridge remote data into the application workflow.
- [HTTP Request and Response Handlers](https://awesome-repositories.com/f/web-development/http-request-and-response-handlers.md) — Injects raw HTTP request and response objects into controllers to allow precise manipulation of the request lifecycle. ([source](https://loopback.io/doc/en/lb4/Accessing-http-request-response.html))
- [Real-Time Communication](https://awesome-repositories.com/f/web-development/real-time-communication.md) — Exposes WebSocket endpoints to enable bidirectional, real-time data exchange between clients and the server.
- [OpenAPI Specification Generators](https://awesome-repositories.com/f/web-development/restful-apis/documentation-schemas/openapi-specification-generators.md) — Automatically derives machine-readable OpenAPI specifications from application code to generate documentation. ([source](https://loopback.io/doc/en/lb4/Building-frontend-angular-application.html))
- [Spec-Driven Implementations](https://awesome-repositories.com/f/web-development/restful-apis/documentation-schemas/openapi-specification-generators/spec-driven-implementations.md) — Automatically produces implementation controllers and models directly from OpenAPI specifications to ensure design alignment.

### Data & Databases

- [Repository Patterns](https://awesome-repositories.com/f/data-databases/backend-data-access-layers/repository-patterns.md) — Abstracts database logic through a repository layer to decouple business logic from persistent storage implementations.
- [Data Schema Management](https://awesome-repositories.com/f/data-databases/data-schema-management.md) — Provides tools for defining and modifying object schemas to automate API and JSON schema creation. ([source](https://loopback.io/doc/en/lb4/Concepts.html))
- [Relational Record Fetching](https://awesome-repositories.com/f/data-databases/database-record-querying/relational-record-fetching.md) — Enables the retrieval of nested resources and associated model instances through referential links. ([source](https://loopback.io/doc/en/lb4/BelongsTo-relation.html))
- [External Data Connectors](https://awesome-repositories.com/f/data-databases/external-data-connectors.md) — Provides a standardized connector system to interface with various external database systems. ([source](https://loopback.io/doc/en/lb4/Concepts.html))
- [Model-to-Source Routing](https://awesome-repositories.com/f/data-databases/model-to-source-routing.md) — Maps specific data models to database connections to support multi-database architectures. ([source](https://cdn.jsdelivr.net/gh/loopbackio/loopback-next@main/README.md))
- [Relational Data Modeling](https://awesome-repositories.com/f/data-databases/relation-prefetching/relational-data-modeling.md) — Allows defining complex model relationships, including many-to-one associations using foreign key constraints. ([source](https://loopback.io/doc/en/lb4/BelongsTo-relation.html))
- [Data Model File Generation](https://awesome-repositories.com/f/data-databases/data-model-file-generation.md) — Automatically generates application model files by inspecting existing relational database tables. ([source](https://loopback.io/doc/en/lb4/Command-line-interface.html))
- [Dynamic Connection Switching](https://awesome-repositories.com/f/data-databases/database-management-systems/database-systems-management/database-systems/database-connections/dynamic-connection-switching.md) — Supports swapping active database connections at runtime based on the request context. ([source](https://loopback.io/doc/en/lb4/Community-extensions.html))
- [Audit Logs](https://awesome-repositories.com/f/data-databases/database-record-management/audit-logs.md) — Maintains audit logs of executed database transactions for compliance and security monitoring. ([source](https://loopback.io/doc/en/lb4/Community-extensions.html))
- [Audit Trails](https://awesome-repositories.com/f/data-databases/in-place-cell-editing/edit-history-tracking/audit-trails.md) — Implements detailed audit trails that record every creation, edit, and deletion performed on data. ([source](https://loopback.io/doc/en/lb4/Community-extensions.html))
- [Soft Deletion](https://awesome-repositories.com/f/data-databases/soft-deletion.md) — Implements status-flag based deletion patterns to mark records as deleted without physical removal. ([source](https://loopback.io/doc/en/lb4/Community-extensions.html))

### Networking & Communication

- [Repository Pattern Abstractions](https://awesome-repositories.com/f/networking-communication/protocol-abstraction-layers/repository-pattern-abstractions.md) — Abstracts data access logic into repository interfaces to decouple the domain from persistence details. ([source](https://cdn.jsdelivr.net/gh/loopbackio/loopback-next@main/README.md))
- [API Transport Abstractions](https://awesome-repositories.com/f/networking-communication/network-transport-protocols/multi-protocol-transport-abstraction/api-transport-abstractions.md) — Maps a single API design across multiple transport protocols, including REST, gRPC, and WebSockets. ([source](https://loopback.io/doc/en/lb4/Concepts.html))

### Security & Cryptography

- [API Access Security](https://awesome-repositories.com/f/security-cryptography/api-access-security.md) — Secures API endpoints by controlling method execution based on user roles and scopes. ([source](https://loopback.io/doc/en/lb4/Authentication-component-decorator.html))
- [API Security Management](https://awesome-repositories.com/f/security-cryptography/api-security-management.md) — Provides comprehensive tools for managing access control, identities, and permissions specifically for API resources.
- [Conditional Access Evaluators](https://awesome-repositories.com/f/security-cryptography/attribute-based-access-control/conditional-access-evaluators.md) — Evaluates dynamic authorization votes and applies precedence rules to determine request access. ([source](https://loopback.io/doc/en/lb4/Authorization-component-decision-matrix.html))
- [Route-Level Authentication Overrides](https://awesome-repositories.com/f/security-cryptography/authentication-clients/anonymous-authentication/route-level-bypass/route-level-authentication-overrides.md) — Allows configuration of authentication behavior through global defaults and request-level overrides for specific routes. ([source](https://loopback.io/doc/en/lb4/Authentication-component-options.html))
- [Global Access Policies](https://awesome-repositories.com/f/security-cryptography/global-access-policies.md) — Executes authorization functions on every decorated endpoint to enforce system-wide access criteria. ([source](https://loopback.io/doc/en/lb4/Authorization-component-authorizer.html))
- [Authentication Strategies](https://awesome-repositories.com/f/security-cryptography/identity-access-management/authentication-strategies.md) — Provides a pluggable system of interchangeable authentication strategies to support diverse user identity verification flows.
- [User Identity Verification](https://awesome-repositories.com/f/security-cryptography/identity-authentication/user-identity-verification.md) — Verifies user identities using a set of pluggable authentication strategies. ([source](https://loopback.io/doc/en/lb4/Community-extensions.html))
- [Credential Validation](https://awesome-repositories.com/f/security-cryptography/identity-authentication/user-identity-verification/credential-validation.md) — Executes authentication strategies to validate credentials and attach user profiles to the request. ([source](https://loopback.io/doc/en/lb4/Authentication-component-action.html))
- [Application Access Rules](https://awesome-repositories.com/f/security-cryptography/infrastructure-policy-enforcement/security-policy-enforcers/application-access-rules.md) — Defines access rules as configurations to determine if a user is permitted to perform an action. ([source](https://loopback.io/doc/en/lb4/Authorization-component-enforcer.html))
- [Method-Level Permissions](https://awesome-repositories.com/f/security-cryptography/message-authentication-systems/endpoint-permission-separation/method-level-permissions.md) — Runs voter functions on a per-method basis to determine if a user can perform a specific action. ([source](https://loopback.io/doc/en/lb4/Authorization-component-authorizer.html))
- [Permission-Based Access Control](https://awesome-repositories.com/f/security-cryptography/permission-based-access-control.md) — Enforces access control by checking specific permission properties defined on user models. ([source](https://loopback.io/doc/en/lb4/Community-examples.html))
- [Runtime Authorization Enforcements](https://awesome-repositories.com/f/security-cryptography/permission-based-access-control/runtime-authorization-enforcements.md) — Actively blocks or allows requests by checking permissions against custom authorizer functions at runtime. ([source](https://loopback.io/doc/en/lb4/Authorization-component-interceptor.html))
- [Role-Based Access Control](https://awesome-repositories.com/f/security-cryptography/role-based-access-control.md) — Restricts application actions based on assigned user roles and vote-based authorization logic. ([source](https://loopback.io/doc/en/lb4/apidocs.index.html))
- [Role-Based Access Control Systems](https://awesome-repositories.com/f/security-cryptography/role-based-access-control-systems.md) — Implements a security layer that manages user permissions and enforces endpoint access based on defined roles.
- [User Role Assignments](https://awesome-repositories.com/f/security-cryptography/role-based-access-control/workspace-role-assignments/organization-role-assignments/user-role-assignments.md) — Associates user identity data with specific scopes and roles to determine appropriate access levels. ([source](https://loopback.io/doc/en/lb4/Authorization-component-enforcer.html))
- [Authorization Voters](https://awesome-repositories.com/f/security-cryptography/security/policies/host-resource-access/file-system-access-controls/path-access-restrictions/path-access-restrictions/subject-access-restrictions/global-authorization-policies/authorization-voters.md) — Implements authorizer functions and voters to resolve conflicting access rights and define custom policies. ([source](https://loopback.io/doc/en/lb4/Authorization-overview.html))
- [Authentication Strategy Registries](https://awesome-repositories.com/f/security-cryptography/ssh-authentication/authentication-strategy-registries.md) — Registers multiple identity verification methods through a standardized interface to support various login flows. ([source](https://loopback.io/doc/en/lb4/Authentication-component-strategy.html))
- [JWT Authentications](https://awesome-repositories.com/f/security-cryptography/token-authentication/jwt-authentications.md) — Issues and verifies signed JSON Web Tokens to maintain secure user sessions. ([source](https://loopback.io/doc/en/lb4/Authentication-tutorial.html))
- [User Authentications](https://awesome-repositories.com/f/security-cryptography/user-authentications.md) — Manages user identity and verifies credentials using multiple authentication adapters to secure resources. ([source](https://loopback.io/doc/en/lb4/apidocs.index.html))
- [User Profile Retrieval](https://awesome-repositories.com/f/security-cryptography/user-profile-retrieval.md) — Provides access to the authenticated user's profile via dependency injection within the request context. ([source](https://loopback.io/doc/en/lb4/Authentication-component-decorator.html))
- [REST Endpoint Protections](https://awesome-repositories.com/f/security-cryptography/api-access-control/endpoint-controls/endpoint-authentication/rest-endpoint-protections.md) — Provides the ability to validate user identities and restrict access to specific REST endpoints using pluggable authentication strategies. ([source](https://loopback.io/doc/en/lb4/Authentication-tutorial.html))
- [Secret Management Integrations](https://awesome-repositories.com/f/security-cryptography/secret-management-integrations.md) — Integrates with external secret management systems to securely store and retrieve sensitive credentials. ([source](https://loopback.io/doc/en/lb4/Community-extensions.html))

### Part of an Awesome List

- [Real-Time WebSocket Servers](https://awesome-repositories.com/f/awesome-lists/devtools/websockets-and-real-time/real-time-websocket-servers.md) — Integrates real-time WebSocket endpoints to enable bidirectional data exchange between clients and the server. ([source](https://loopback.io/doc/en/lb4/Community-examples.html))
- [Web Frameworks](https://awesome-repositories.com/f/awesome-lists/devtools/web-frameworks.md) — Powerful framework for creating REST APIs and connecting data sources.

### Development Tools & Productivity

- [Application Scaffolding](https://awesome-repositories.com/f/development-tools-productivity/application-scaffolding.md) — Provides CLI tools to generate the initial directory structure and boilerplate code for new API projects. ([source](https://loopback.io/doc/en/lb4/Appsody-LoopBack.html))
- [Modular Feature Extensions](https://awesome-repositories.com/f/development-tools-productivity/extensible-application-frameworks/modular-feature-extensions.md) — Enables grouping services and bindings into modular packages that plug into the application to add business functionality. ([source](https://loopback.io/doc/en/lb4/Component.html))
- [Local Project Structure Generators](https://awesome-repositories.com/f/development-tools-productivity/local-project-structure-generators.md) — Generates the initial application folder structure and essential files to start development. ([source](https://loopback.io/doc/en/lb4/Application-generator.html))
- [Project Bootstrapping Templates](https://awesome-repositories.com/f/development-tools-productivity/project-bootstrapping-templates.md) — Generates project structures and configuration files from templates to accelerate initial setup. ([source](https://loopback.io/doc/en/lb4/Command-line-interface.html))
- [REST API Integrations](https://awesome-repositories.com/f/development-tools-productivity/rest-api-integrations.md) — Implements integration logic for communicating with remote services via RESTful HTTP endpoints. ([source](https://loopback.io/doc/en/lb4/Calling-rest-apis.html))

### DevOps & Infrastructure

- [API Orchestration Gateways](https://awesome-repositories.com/f/devops-infrastructure/api-service-management/microservice-infrastructure/service-mesh-components/spring-cloud-implementations/api-orchestration-gateways.md) — Integrates external REST and SOAP services into a single unified API surface for easier consumption.

### Programming Languages & Runtimes

- [Model-to-Schema Generation](https://awesome-repositories.com/f/programming-languages-runtimes/json-schema-converters/model-to-schema-generation.md) — Transforms application classes and models into JSON Schema definitions using reflection and metadata. ([source](https://loopback.io/doc/en/lb4/apidocs.index.html))
- [Request Parameter Parsing](https://awesome-repositories.com/f/programming-languages-runtimes/type-annotations/request-parameter-parsing.md) — Extracts data from URL paths, query strings, and JSON objects to populate controller method arguments. ([source](https://loopback.io/doc/en/lb4/Advanced-sequence-topics.html))

### Testing & Quality Assurance

- [API Schema Validators](https://awesome-repositories.com/f/testing-quality-assurance/api-schema-validators.md) — Automatically verifies endpoints and schemas to ensure consistency across development teams. ([source](https://loopback.io/doc/en/lb4/))