@cloudpayments/checkout/babel.config.js

const sharedPresets = ['@babel/typescript'];
const shared = {
    ignore: ['src/**/*.spec.ts'],
    presets: sharedPresets
};

const plugins = [
    [
        '@babel/plugin-proposal-decorators',
        { 'legacy': true }
    ],
    [
        '@babel/plugin-proposal-class-properties',
        { 'loose': false }
    ]
];

module.exports = {
    env: {
        esmUnbundled: {
            ...shared,
            plugins: plugins
        },
        esmBundled: {
            ...shared,
            presets: [['@babel/env', {
                targets: {
                    browsers: 'ie >= 11, safari >= 11'
                },
                modules: 'auto',
                spec: true,
                useBuiltIns: 'usage',
                forceAllTransforms: true,
                corejs: {
                    version: 3.9,
                },
            }], ...sharedPresets],
            plugins: plugins
        },
        cjs: {
            ...shared,
            presets: [['@babel/env', {
                modules: 'commonjs',
            }], ...sharedPresets],
            plugins: plugins
        },
        test: {
            presets: ['@babel/env', ...sharedPresets],
            plugins: plugins
        },
    },
};