Most of my classes are compiling to: var whateverClassName=Null

[fracturedexistence]

Hi, I recently upgraded Babel to version 7, and the docs recommended Webpack as a companion package.
So, yes... I'm new to WebPack, be gentle on me.
But my problem is... I cannot get my classes to transpile properly.

Here's a simple test file that I created, (because this was driving me bonkers):

class LongClassNameA {
	prop;
	constructor()
	{
		this.prop = "XYZ";
		console.log("[A] A Superclass Instantiated");
	}
}

class LongClassNameB extends LongClassNameA
{
	constructor()
	{
		super();
		console.log("[B] B Subclass Instantiated");
	}
}

The resulting file (minus all of Babel's polyfill) is:
var LongClassNameA=null,LongClassNameB=null
This is an unacceptable outcome.

I've tried a myriad of configuration changes to my webpack.config.js file
involving optimization.sideEffects, and minimization & TerserPlugin options, none of my changes made any difference at all.

However, I did find one workaround solution, it seems silly that I have to do this, but it works 100% of the time.

class LongClassNameA {
	prop;
	constructor()
	{
		this.prop = "XYZ";
		console.log("[A] A Superclass Instantiated");
	}
}

class LongClassNameB extends LongClassNameA
{
	constructor()
	{
		super();
		console.log("[B] B Subclass Instantiated");
	}
	static wpbug(){}
}
LongClassNameB.wpbug();

Now transpiles to (minus all of Babel's polyfill)
var LongClassNameA=_createClass((function LongClassNameA(){_classCallCheck(this,LongClassNameA),_defineProperty(this,"prop",void 0),this.prop="XYZ",console.log("[A] A Superclass Instantiated")})),LongClassNameB=function(){function LongClassNameB(){var t;return _classCallCheck(this,LongClassNameB),t=_callSuper(this,LongClassNameB),console.log("[B] B Subclass Instantiated"),t}return _inherits(LongClassNameB,LongClassNameA),_createClass(LongClassNameB,null,[{key:"wpbug",value:function wpbug(){}}])}();LongClassNameB.wpbug();

So, if anyone else is experiencing this annoyance, feel free to use my workaround to bring some sanity back into your work life.

If any one knows of a webpack configuration that will definitely prevent my classes from transpiling to <classname>=null, then please share your valuable knowledge! It would be very appreciated!

I'm guessing this might be a bug, but I'm not going to wait months for a patch to drop.

Cheers

[alexander-akait]

Please create reproducible test repo and I will look