Getting Started
What & Why
Nest Graph Inspector generates runtime dependency graphs from your NestJS application.
Nest Graph Inspector is a NestJS module that generates a runtime dependency graph from the Nest application container to be visualized dynamically in our Interactive Web Viewer or exported to JSON.
The generated graph shows:
- Loaded modules from the root module
- Import relationships between modules
- Providers and controllers in each module
- Dependencies between providers/controllers
- Internal dependencies, external module dependencies, and selected NestJS core dependencies
You can try the interactive viewer directly at our View Page.
The graph is generated from the runtime Nest container, not from static source parsing. What you see is what's actually running.
Use Cases
These are the common problems Nest Graph Inspector helps solve.
Impact Analysis
- narrowing regression test scope to the most relevant modules/providers
- reducing unnecessary testing for unrelated areas
- understanding the likely blast radius before making a change
Test Prioritization
- selecting critical providers/use cases for fast validation
- understanding dependency chains between providers/controllers
- prioritizing which flows should be checked first after a change
Architecture Visibility
- onboarding engineers faster
- spotting highly coupled modules/providers
- making refactors safer by visualizing relationships before changes
What You Get
When you add Nest Graph Inspector to your project, it produces a complete map of your application architecture:
Module Graph
See every module and how they import each other.
Provider Dependencies
Trace which providers depend on which, across module boundaries.
Controller Dependencies
Understand what each controller needs to function.
Interactive Web Viewer
Explore results dynamically in our Interactive Web Viewer to understand complex interactions at a glance.