Expanding the capabilities of Hapi types in Typescript

Question

Expanding the capabilities of Hapi types in Typescript

I'm in the process of enhancing existing hapi definitions by incorporating a new type, specifically the seneca type. Here's an example:

interface SenecaMethods {
    act: any;
    add: any;
}

interface HapiServer extends Hapi.Server {
    info: any;
    seneca: SenecaMethods;
}

const server: HapiServer = new Hapi.Server();

An error occurs stating that Server is not assignable to HapiServer, with the property 'seneca' missing in type server.

How can I successfully add seneca methods to Hapi.Server without making it optional?

typescript hapi.js

Answer 1

Answer №1

Here are some different approaches you can take:

create:

const app: ExpressApp = new Express.Application() as ExpressApp;

//app.middleware === null

merge

const app: ExpressApp = Object.assign(new Express.Application(),
    { middleware: { use: "foo", get: "bar" } }
  )

enhance

class MyExpressApp extends Express.Application {
  config: any;
  middleware: MiddlewareHandlers;

  constructor(){
    super();
    this.middleware = {
      use:"foo", 
      get:"bar",
    }
  }
}

const app: MyExpressApp = new MyExpressApp();

Answer 2

Here are some different approaches you can take:

create:

const app: ExpressApp = new Express.Application() as ExpressApp;

//app.middleware === null

merge

const app: ExpressApp = Object.assign(new Express.Application(),
    { middleware: { use: "foo", get: "bar" } }
  )

enhance

class MyExpressApp extends Express.Application {
  config: any;
  middleware: MiddlewareHandlers;

  constructor(){
    super();
    this.middleware = {
      use:"foo", 
      get:"bar",
    }
  }
}

const app: MyExpressApp = new MyExpressApp();

Expanding the capabilities of Hapi types in Typescript

Answer №1

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