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);
1 Answer
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}`);
}
}
