How to use @babel/plugin-transform-classes - 2 common examples

const { join } = require('path');

const ModuleRewrite = require('babel-plugin-module-rewrite').default;
const ObjectRestSpread = require('@babel/plugin-proposal-object-rest-spread').default;
const ClassProperties = require('@babel/plugin-proposal-class-properties').default;
const ModulesCommonJS = require('@babel/plugin-transform-modules-commonjs').default;
const AddModuleExports = require('babel-plugin-add-module-exports');
const Classes = require('@babel/plugin-transform-classes').default;
const BlockScoping = require('@babel/plugin-transform-block-scoping').default;
const ArrowFunctions = require('@babel/plugin-transform-arrow-functions').default;
const ShorthandProperties = require('@babel/plugin-transform-shorthand-properties').default;
const ObjectDestructuring = require('@babel/plugin-transform-destructuring').default;
const Parameters = require('@babel/plugin-transform-parameters').default;
const Spread = require('@babel/plugin-transform-spread').default;
const TemplateLiterals = require('@babel/plugin-transform-template-literals').default;
const ForOf = require('@babel/plugin-transform-for-of').default;
const ComputedProperties = require('@babel/plugin-transform-computed-properties').default;
const ElementClasses = require('babel-plugin-transform-custom-element-classes');

const esmFunc = join(__dirname, 'utils/replace-esm.js');
const cjsFunc = join(__dirname, 'utils/replace-cjs.js');

const { NODE_ENV } = process.env;
const exportObj = {};

return () => ({
    plugins: [
      [require('@babel/plugin-transform-template-literals').default, { loose }],
      require('@babel/plugin-transform-literals').default,
      require('@babel/plugin-transform-function-name').default,
      [require('@babel/plugin-transform-arrow-functions').default],
      require('@babel/plugin-transform-block-scoped-functions').default,
      [require('@babel/plugin-transform-classes').default, { loose }],
      require('@babel/plugin-transform-object-super').default,
      require('@babel/plugin-transform-shorthand-properties').default,
      require('@babel/plugin-transform-duplicate-keys').default,
      [
        require('@babel/plugin-transform-computed-properties').default,
        { loose },
      ],
      [require('@babel/plugin-transform-for-of').default, { loose }],
      require('@babel/plugin-transform-sticky-regex').default,
      require('@babel/plugin-transform-unicode-regex').default,
      require('@babel/plugin-check-constants').default,
      [require('@babel/plugin-transform-spread').default, { loose }],
      require('@babel/plugin-transform-parameters').default,
      [require('@babel/plugin-transform-destructuring').default, { loose }],
      require('@babel/plugin-transform-block-scoping').default,
      require('@babel/plugin-transform-property-literals').default,