The output in some of the bundled JS file has some Javascript at the top of the page. I don’t remember it being there before. Where is it from? How do I remove it?

bundled-output.js:

var __create = Object.create;
var __defProp = Object.defineProperty;
var __getProtoOf = Object.getPrototypeOf;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __toESM = (mod, isNodeMode, target) => {
  target = mod != null ? __create(__getProtoOf(mod)) : {};
  const to = isNodeMode || !mod || !mod.__esModule ? __defProp(target, "default", { value: mod, enumerable: true }) : target;
  for (let key of __getOwnPropNames(mod))
    if (!__hasOwnProp.call(to, key))
      __defProp(to, key, {
        get: () => mod[key],
        enumerable: true
      });
  return to;
};
var __commonJS = (cb, mod) => () => (mod || cb((mod = { exports: {} }).exports, mod), mod.exports);
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, {
      get: all[name],
      enumerable: true,
      configurable: true,
      set: (newValue) => all[name] = () => newValue
    });
};

I’m guessing it may be for commonjs support? If that’s so how do I disable it?