accounts-frontend/babel.config.js

module.exports = {
    presets: ['@babel/preset-react', '@babel/preset-flow', ['@babel/preset-env']],
    plugins: [
        '@babel/plugin-syntax-dynamic-import',
        '@babel/plugin-proposal-function-bind',
        '@babel/plugin-proposal-class-properties',
        '@babel/plugin-proposal-optional-chaining',
        '@babel/plugin-proposal-nullish-coalescing-operator',
        [
            '@babel/plugin-transform-runtime',
            {
                corejs: 3
            }
        ],
        ['react-intl', { messagesDir: './dist/messages/' }]
    ],
    env: {
        webpack: {
            plugins: ['react-hot-loader/babel'],
            presets: [
                [
                    '@babel/preset-env',
                    {
                        modules: false,
                        useBuiltIns: 'usage', // or "entry"
                        corejs: 3
                    }
                ]
            ]
        },
        development: {
            presets: []
        },
        test: {
            presets: []
        }
    }
};