Velo, static variables in classes error?

Question:
I have defined a javascript class, with a static variable, which causes a warning build.log report on publication.

Product:
Old editor or Studio, happens in either.

What are you trying to achieve:
define a class static variable accessible to to class referring code.

What have you already tried:
Here is an example:

class Test {

	static VAR = "abc";

	static GetVAR() {
		return Test.VAR;
	}
}

export function VarTest() {
console.log( "Var static: " + Test.VAR );
console.log( "Var internal: " + Test.GetVAR() );
}

This code works, if run, it behaves as expected and outputs the variable.

But there is a warning when publishing in the build.log on the definition line.

Additional information:
Here is what the editor shows, with a warning:

And, the build error on publishing the site:

And, the build log error:

Yet, on execution, calling the function, it works as expected:

It may be because static class fields aren’t added in Wix build log testing environment(although I think they have a rather new JS).