Question:
I'm starting a project with NodeJS and TypeScript and the instructor told me to install @types/node , in addition to the TypeScript TypeScript package. He was quick to mention that @types/node creates TypeScript types for Node entities, but would like a more in-depth explanation of how this works.
Answer:
This package in scope @types is where we can find several useful type definitions, such as, for example, the Node type definitions that allow us to use, for example, require to import modules.
Node's @types package contains type definitions for many libraries such as Express, Sequelize, JQuery and many others. Basically what it does is:
- check if the package you are using already has built-in types, and if you prefer, prefer these;
- check that the type definitions have already been shipped with the compiler.
This link: Typescript Typings – The Complete Guide To Type Definitions: @types, Compiler Opt-In Types: When To Use Each and Why? It has material to explain Types and I think it's worth a look. Hope this helps.