this.constructor.staticMethod() is ok in JS, but is an error in TS

[vadzim]

🔎 Search Terms

constructor class type

🕗 Version & Regression Information

• This is the behavior in every version I tried, and I reviewed the FAQ

⏯ Playground Link

https://www.typescriptlang.org/play/?#code/MYGwhgzhAEDC5WgbwFAEgIBcyYJbGgGVs9gBZAU0wAsB7AEwAoBKZdNYWgOwlpAoB0IWgHNGAIiw580XDABmuLhXHN0AX3SUaDFmzRoA9Ieg050AO60ATgGsYS6AAdwjgFKEANNABGAV0xZGE4eXHoKawp6aEgYrmgI6xtZeIAVQnYzCAEQrGs-YEwbAWJpcio6JjU0TU0UZQs4BAgWAW1KliA

💻 Code

class Class {
	static StaticMethod() {
		console.log("static is fine")
	}
	Method() {
		// this works in plain JS, but is considered as an error in TS
		this.constructor.StaticMethod()
	}
}

new Class().Method()

🙁 Actual behavior

TS emits an error Property 'StaticMethod' does not exist on type 'Function'. ts(2339)

🙂 Expected behavior

no error in TS

Additional information about the issue

this also works well in JS:

class Class {
	static StaticMethod() {
		console.log("Class static")
	}
	Method() {
		// this works in plain JS, but is considered as an error in TS
        // prints "Derived static"
		this.constructor.StaticMethod()
	}
}

class Derived extends Class {
    static StaticMethod() {
        console.log("Derived static")
    }
}

new Derived().Method()

https://www.typescriptlang.org/play/?#code/MYGwhgzhAEDC5WgbwFAEgIBcyYJbGgGVs9gBZAU0wAsB7AEwAoBKZdNYWgOwlpAoB0IWgHNGAIniQYWHPnHN0AX3SUaDFmzRoA9Dug1cMAO60ATgGsYuLtAAO4G9ABShADTQARgFdM0I9CcPLj0FGYU9NCQUbZhZub+tgAqhCjQ6RnpevZmNpgw4gAiYbgAbhHQsqTi7IYQAkFYZt7AmOYCxHLkVHRMimgqKiig0tDFueWRFAAemBRc9DBSiKiZVfhEJPhqvZqrmRmNfILCYkUlk5VbwAppGYMoKFwUxmMXESwCOxrMQA

[MartinJohns]

Duplicate of #3841 / #32452.