Nest.js Fundamentals — DI and Module System
Nest.js provides a DI container and Module system at the framework level in the Node.js ecosystem. A summary of its core design principles: IoC, DI, Module, and Provider.
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Dependency Injection — The Hierarchy of DIP, IoC, and DI
DIP (principle), IoC (pattern), and DI (technique) sit at different levels of abstraction. The hierarchy must be clear before framework features and design principles can be told apart.