Babel output in bundle.js file not properly outputting

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Javascript

npm

ES6

webpack

I have been trying for hours to figure out what is going on with Babel. It is not outputting anything close to what it should.

Shown here:

I can provide any context/files that you may need to deduce a solution. Thanks.

sample script.js function:

var nameBuilder = function(firstName="John", lastName="Doe") {
console.log(firstName + " " + lastName);
};

nameBuilder();

Babel output (came in one block of code so I did not indent):

!function(e){var n={};function t(o){if(n[o])return n[o].exports;var r=n[o]={i:o,l:!1,exports:{}};return e[o].call(r.exports,r,r.exports,t),r.l=!0,r.exports}t.m=e,t.c=n,t.d=function(e,n,o){t.o(e,n)||Object.defineProperty(e,n,{configurable:!1,enumerable:!0,get:o})},t.r=function(e){Object.defineProperty(e,"__esModule",{value:!0})},t.n=function(e){var n=e&&e.__esModule?function(){return e.default}:function(){return e};return t.d(n,"a",n),n},t.o=function(e,n){return Object.prototype.hasOwnProperty.call(e,n)},t.p="",t(t.s=1)}([function(e,n,t){"use strict";!function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:"John",n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:"Doe";console.log(e+" "+n)}()},function(e,n,t){e.exports=t(0)}]);

What I have tried:

Spent hours reinstalling stuff, searching for the answer. I haven't been able to find someone with this problem.