TypeScript

Type Definitions

Overwrite exiting vendor type definitions

vendor/custom.d.ts

declare global {
  namespace NodeJS {
    interface Global {
        myConfig: {
          a: number;
          b: number;
        }
    }
  }
}

tsconfig.json

{
  "types": [
    ...
    "vendor/custom.d.ts"
  ]
}