Inference for Object.isPrototypeOf()

Hi, I am wondering would be possible to infer types for isPrototypeOf() function same way as it's done with instanceof operator? So we could narrow type of argument if it's been created using Object.create(proto) function and its type would be something like typeof proto if check is fulfilled.

Search Terms

isPrototypeOf

Examples

if (object instanceof HTMLAnchorElement) {
    console.log(object.href);
}

if (HTMLAnchorElement.prototype.isPrototypeOf(object)) {
   console.log(object.href);
}

Checklist

My suggestion meets these guidelines:

• This wouldn't be a breaking change in existing TypeScript/JavaScript code
• This wouldn't change the runtime behavior of existing JavaScript code
• This could be implemented without emitting different JS based on the types of the expressions
• This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, etc.)
• This feature would agree with the rest of TypeScript's Design Goals.

L’issue n’identifie aucun fichier d’implémentation, test ou point d’entrée. Commencez par localiser le rétrécissement de type existant pour instanceof, puis évaluez comment les objets créés avec Object.create(proto) devraient être rétrécis dans les exemples de Object.isPrototypeOf() ; le travail est considéré comme terminé lorsque le comportement proposé est spécifié et couvert par des tests de compilateur appropriés.