What is the base class for Svelte components?

I’m using Svelte with TypeScript, and I’ve got a function that should only accept a Svelte component as its argument. I want to be able to do something like this:

import Button from './Button.svelte';

myFunction(Button)
// or perhaps a generic version:
myFunction<Button>()

Needless to say, I want to enforce that the parameter must be a Svelte component, so that if anything else is passed, I get an error:

myFunction(123) // <= Should give an error
myFunction("Hello") // <= Should give an error

I initially intuitively thought it must be the SvelteComponent class, but unfortunately, when I do the following:

import { SvelteComponent } from 'svelte';
import Button from './Button.svelte';
let foo: SvelteComponent = Button;

I get the following error:

Type 'typeof Button__SvelteComponent_' is missing the following properties from type 'SvelteComponentTyped<any, any, any>': $set, $on, $destroy, $$prop_def, and 5 more

SvelteComponentTyped doesn’t seem to work either, same error:

import { SvelteComponentTyped } from 'svelte';
import Button from './Button.svelte';
let foo: SvelteComponentTyped = Button;

Imported from svelte/internal, still doesn’t work; again, same error:

I’ve also created a simple GitHub repo that reproduces the error, in case you need it: https://github.com/AradAral/SvelteBaseClass

Is this intentional or a bug? If it’s intentional I think it can be misleading; and is there, therefore, no way to achieve what I just described in Svelte? Isn’t there any type one would use to enforce a Svelte component?

[aradalvand]

Turns out I was importing SvelteComponent from svelte/internal when I was trying typeof SvelteComponent. Thanks @dummdidumm, @PatrickG.

[jasonlyu123]

For future reference, one is the type of an instance and the other is a function. The example only works because it is basically an empty object.