Comments (9)
extends
in this position is only really for adding type arguments. It can't be used to make an extends clause where one doesn't exist.
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But then how should I document it to get member suggestions from multiple parents?
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JS doesn't have multiple inheritance; how can a class extend B if it already extends A?
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Well technically it doesn't extend it, but has the members.
In my use case I have an APIBase class that handles a WebSocket connection and events by extending EventTarget, I also have another class that serves as an interface which holds methods that are implemented on the server side and I have a Proxy targeting the APIBase to handle creating functions for RPC. I want to document this proxy instance in a way that would provide suggestions for the base members and also the RPC methods that are created on the fly by the proxy.
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@extends
is fundamentally intended to model exactly class extends; what you're describing is something else which would probably be modelled better with implements
or a type cast.
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I totally forgot that @implements
exists, but sadly that doesn't work either.
class A {foo(){}}
/** @interface */
class B {bar(){}}
/**
* @implements {B}
*/
class C5 extends A {baz(){}}
new C5()//. will suggest: baz, foo -> missing: bar
/**
* @implements {A}
* @implements {B}
*/
class C6 {baz(){}}
new C6()//. will suggest: baz -> missing: foo, bar
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I don't believe that's how @implements
works.
I'm very clumsy with JSDoc, but something along these lines seems to work
class A {foo(){}}
class B {bar(){}}
class MyClass_ {boop(){}}
/** @type
* {(typeof MyClass_)
* & {new(): (A & B & MyClass_)}}
* */
export const MyClass = /** @type {any} */ (MyClass_);
const myInstance = new MyClass();
myInstance //.foo(), .bar(), .boop()
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Well it works... but it's more complex than a simple @implements
. Also I tested C1-C6 in WebStorm and in every case I got the expected suggestions.
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This issue has been marked as "Working as Intended" and has seen no recent activity. It has been automatically closed for house-keeping purposes.
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