Using TypeScript super()

问题:

I am trying to extend a class in TypeScript. I keep receiving this error on compile: 'Supplied parameters do not match any signature of call target.' I have tried referencing the artist.name property in the super call as super(name) but is not working.

Any ideas and explanations you may have will be greatly appreciated. Thanks - Alex.

class Artist {
  constructor(
    public name: string,
    public age: number,
    public style: string,
    public location: string
  ){
    console.log(`instantiated ${name}, whom is ${age} old, from ${location}, and heavily regarded in the ${style} community`);
  }
}

class StreetArtist extends Artist {
  constructor(
    public medium: string,
    public famous: boolean,
    public arrested: boolean,
    public art: Artist
  ){
    super();
    console.log(`instantiated ${this.name}. Are they famous? ${famous}. Are they locked up? ${arrested}`);
  }
}

interface Human {
  name: string,
  age: number
}

function getArtist(artist: Human){
  console.log(artist.name)
}

let Banksy = new Artist(
  "Banksy",
   40,
  "Politcal Graffitti",
  "England / Wolrd"
)

getArtist(Banksy);

回答1:

The super call must supply all parameters for base class. The constructor is not inherited. Commented out artist because I guess it is not needed when doing like this.

class StreetArtist extends Artist {
  constructor(
    name: string,
    age: number,
    style: string,
    location: string,
    public medium: string,
    public famous: boolean,
    public arrested: boolean,
    /*public art: Artist*/
  ){
    super(name, age, style, location);
    console.log(`instantiated ${this.name}. Are they famous? ${famous}. Are they locked up? ${arrested}`);
  }
}

Or if you intended the art parameter to populate base properties, but in that case I guess there isn't really a need for using public on art parameter as the properties would be inherited and it would only store duplicate data.

class StreetArtist extends Artist {
  constructor(
    public medium: string,
    public famous: boolean,
    public arrested: boolean,
    /*public */art: Artist
  ){
    super(art.name, art.age, art.style, art.location);
    console.log(`instantiated ${this.name}. Are they famous? ${famous}. Are they locked up? ${arrested}`);
  }
}