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ViewsJSDoc: 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 answers
Answer question0
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 }];
}
}
