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VistasJSDoc: how to hint this.constructor.staticSomething?
I am calling a static method from the constructor of an anonymous javascript class using this.constructor.coords(), but the returned type is not being recognized correctly. It is treated as any.
I know I can cast just cast it manually as {x: number; y: number;}[], but I wonder if there is a smarter way to make VSCode/JSDoc just notice that the type of this.constructor.something must be that of the corresponding static method or property. Alternatively, I wonder if it is possible in JSDoc to cast this.cls = this.constructor with the anonymous class type (without giving it a name), because that would solve the problem for this.constructor.something as well.
MyAnonymousClass = class {
static coords(){
return [{x:0, y:1}, {x:1, y:0}, {x:-1, y:-1}];
}
/* type of coords (on mouse hover in vsCode):
(method) MyAnonymousClass.coords(): {
x: number;
y: number;
}[] */ // (CORRECT)
constructor(){
const x = this.constructor.coords();
// type of x (on mouse hover in vsCode): any // (INCORRECT)
}
}
AnotherAnonymousClass = class extends MyAnonymousClass{
static coords(){
return [{x:0, y:2}, {x:-2, y:0}];
}
}
1 Respuestas
Responde la pregunta0
The following should do the trick. I've just wrapped the class declaration around an IIFE so it's never accessible outside. It's like an anonymous class.
const MyAnonymousClass = (() => {
return class _ {
static coords() {
return [{ x: 0, y: 1 }, { x: 1, y: 0 }, { x: -1, y: -1 }];
}
constructor() {
const x = /** @type {typeof _} */(this.constructor).coords();
}
foo() { }
}
})();
const AnotherAnonymousClass = class extends MyAnonymousClass {
static coords() {
return [{ x: 0, y: 2 }, { x: -2, y: 0 }];
}
}
