task-handler/babel.config.js at master · odo-network/task-handler · GitHub

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module.exports = function getBabelConfiguration(api) {
  api.cache(true);
  return {
    comments: false,
    presets: [
      '@babel/preset-flow',
      [
        '@babel/preset-env',
        {
          shippedProposals: true,
          useBuiltIns: false,
          // useBuiltIns: 'usage',
          // corejs: '3.0.0',
          // targets: {
          //   node: '9',
          //   browsers: [
          //     'last 2 Chrome versions',
          //     'last 2 Firefox versions',
          //     'last 3 Edge versions',
          //     'last 1 Safari versions',
          //   ],
          // },
        },
      ],
      // ...(process.env.NODE_ENV === 'production' ? ['babel-preset-minify'] : []),
    ].filter(Boolean),
    plugins: [
      '@babel/plugin-transform-runtime',
      '@babel/plugin-proposal-do-expressions',
      '@babel/plugin-proposal-class-properties',
      ...(process.env.NODE_ENV === 'test' ? ['istanbul'] : []),
    ].filter(Boolean),
  };
};