如何解决此TypeScript错误：“预期0-1个参数，但有2个”

Question

I'm writing Node.js code in JavaScript (not TypeScript) but use the TypeScript static analysis tool to check my JavaScript.

I have the following JavaScript code that uses the stampit library:

import stampit from 'stampit'

const Character = stampit({
  props: {
    name: null,
    health: 100
  },
  init({ name = this.name }) {
    this.name = name
  }
})

const Fighter = stampit(Character, { // inheriting
  props: {
    stamina: 100
  },
  init({ stamina = this.stamina }) {
    this.stamina = stamina;    
  },
  methods: {
    fight() {
      console.log(`${this.name} takes a mighty swing!`)
      this.stamina--
    }
  }
})

I've installed the DefinatelyType package for stampit .

However, I got the following error and it applies to the whole stampit(Character, {...}) function call:

Expected 0-1 arguments, but got 2

Any ideas how to resolve this error? Even just turn it off using TypeScript?

Answer 1

UPDATE: It seems like it's a bug in @types/stampit. It might work with TypeScript without issues, but has issues with writing JS code. The issue can be resolved by changing the stampit declaration to:

declare function stampit(f1?: stampit.Stamp | Options, options?: Options): stampit.Stamp;

The type definitions are for stampit v3.0.x , whose most recent release was 3.0.6 two years ago , so (assuming you freshly installed stampit v4.1.2) the definitions are out of sync with the code & documentation. Your options are:

1. (strongly discouraged) Use stampit version v3.0.6 ( npm i -S stampit@3.0.6 )
2. Write updated type definitions for stampit v4.1.2 (and, hopefully, create a pull request against the DefinitelyTyped repository)
3. Add //@ts-ignore everywhere you get an error, as vibhor1997a said
4. Explicitly treat the library as untyped: const stampit: any = require("stampit");

#2 is the best, obviously, since it also benefits anyone else who wants to use the library. If you don't have the time or inclination to do that, I would advise against #3 because it's error-prone and tedious. That leaves #4, which at least forces you to be explicit and vigilant.