stan-builder/lib/get-babel-config.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = getBabelConfig;

var browserslist = require('../template/browserslist.js');

function getBabelConfig(opts) {
  var type = opts.type,
      typescript = opts.typescript,
      target = opts.target,
      verbose = opts.verbose,
      lazy = opts.lazy,
      runtimeHelpers = opts.runtimeHelpers;
  var isBrowser = target === 'browser';
  return {
    presets: [typescript && require.resolve('@babel/preset-typescript'), [require.resolve('@babel/preset-env'), {
      targets: isBrowser ? {
        browsers: browserslist
      } : {
        node: 8
      },
      debug: verbose,
      modules: type === 'esm' ? false : 'auto'
    }], isBrowser && require.resolve('@babel/preset-react')].filter(Boolean),
    plugins: [type === 'cjs' && lazy && !isBrowser && [require.resolve('@babel/plugin-transform-modules-commonjs'), {
      lazy: true
    }], [require.resolve('@babel/plugin-proposal-decorators'), {
      legacy: true
    }], require.resolve('@babel/plugin-syntax-dynamic-import'), require.resolve('@babel/plugin-proposal-export-default-from'), require.resolve('@babel/plugin-proposal-export-namespace-from'), require.resolve('@babel/plugin-proposal-do-expressions'), require.resolve('@babel/plugin-proposal-object-rest-spread'), require.resolve('@babel/plugin-transform-spread'), require.resolve('@babel/plugin-proposal-nullish-coalescing-operator'), require.resolve('@babel/plugin-proposal-optional-chaining'), runtimeHelpers && [require.resolve('@babel/plugin-transform-runtime'), {
      useESModules: isBrowser && type === 'esm',
      version: require('@babel/runtime/package.json').version
    }]].filter(Boolean)
  };
}