babel.config.js

/**
 * Copyright 2023 Google LLC
 *
 * Use of this source code is governed by an MIT-style
 * license that can be found in the LICENSE file or at
 * https://opensource.org/licenses/MIT.
 */
module.exports = (api) => {
  api.cache(true)

  return {
    presets: [
      [
        '@babel/env',
        {
          targets: {
            esmodules: true,
          },
          modules: false,
        },
      ],
      [
        '@babel/preset-react',
        {
          development: process.env.BABEL_ENV !== 'build',
        },
      ],
      '@babel/preset-typescript',
    ],
    env: {
      build: {
        ignore: [
          '**/*.d.ts',
          '**/*.test.js',
          '**/*.test.jsx',
          '**/*.test.ts',
          '**/*.test.tsx',
          '__snapshots__',
          '__tests__',
        ],
      },
    },
    ignore: ['node_modules'],
    plugins: [
      '@babel/plugin-proposal-class-properties',
      '@babel/plugin-proposal-object-rest-spread',
      '@babel/plugin-transform-runtime',
      'babel-plugin-styled-components',
    ],
  }
}