askirmas / react-classnaming

import type { JSXElementConstructor, Component, ReactElement } from "react"

import { ClassNamed, ClassNamesProperty, ClassHash } from "../src/main.types"

function FWith(_: ClassNamed & ClassNamesProperty<{a: ClassHash}>) { return null }

describe("extending", () => {

  it("function", () => {

    type ReactFunction<P = never> = (props: P) => ReactElement<any, any> | null

    type FnWithClassNames = ReactFunction<{

      classname: any

      [k: string]: any

    }>

    // function check1(_: FnWithClassNames) {}

    // function check2<T extends FnWithClassNames>(_: T) {}

    function check1(_: ReactFunction) {}

    function check2<T extends ReactFunction>(_: T) {}

    check1(FWith)

    check2(FWith)

  })

  // type X = JSXElementConstructor

//     type JSXElementConstructor<P> =

// | ((props: P) => ReactElement<any, any> | null)

// | (new (props: P) => Component<P, any>);