index.js

'use strict';

const { declare } = require('@babel/helper-plugin-utils');

const defaultTargets = {
  android: 35,
  chrome: 40,
  edge: 18,
  ie: 11,
  firefox: 72,
  safari: 12,
};

function buildTargets({ additionalTargets }) {
  return Object.assign({}, defaultTargets, additionalTargets);
}

module.exports = declare((api, options) => {
  // see docs about api at https://babeljs.io/docs/en/config-files#apicache
  api.assertVersion('^7.0.0');

  const {
    modules = 'auto',
    targets = buildTargets(options),
    removePropTypes,
    looseClasses = false,
    runtimeVersion,
    runtimeHelpersUseESModules = !modules,
    transformRuntime = true,
  } = options;

  if (typeof modules !== 'boolean' && modules !== 'auto') {
    throw new TypeError('babel-preset-airbnb only accepts `true`, `false`, or `"auto"` as the value of the "modules" option');
  }

  const debug = typeof options.debug === 'boolean' ? options.debug : false;
  const development = typeof options.development === 'boolean'
    ? options.development
    : api.cache.using(() => process.env.NODE_ENV === 'development');

  return {
    presets: [
      [require('@babel/preset-env'), {
        debug,
        exclude: [
          'transform-async-to-generator',
          'transform-template-literals',
          'transform-regenerator',
        ],
        modules: modules === false ? false : 'auto',
        targets,
      }],
      [require('@babel/preset-react'), { development }],
    ],
    plugins: [
      looseClasses ? [require('@babel/plugin-transform-classes'), {
        loose: true,
      }] : null,

      removePropTypes ? [require('babel-plugin-transform-react-remove-prop-types'), Object.assign({
        mode: 'wrap',
        additionalLibraries: ['airbnb-prop-types'],
        ignoreFilenames: ['node_modules'],
      }, removePropTypes)] : null,

      [require('@babel/plugin-transform-template-literals'), {
        spec: true,
      }],
      require('@babel/plugin-transform-property-mutators'),
      require('@babel/plugin-transform-member-expression-literals'),
      require('@babel/plugin-transform-property-literals'),
      require('@babel/plugin-proposal-nullish-coalescing-operator'),
      require('@babel/plugin-proposal-numeric-separator'),
      require('@babel/plugin-proposal-optional-catch-binding'),
      require('@babel/plugin-proposal-optional-chaining'),
      [require('@babel/plugin-proposal-object-rest-spread'), {
        useBuiltIns: true,
      }],
      transformRuntime ? [require('@babel/plugin-transform-runtime'), {
        absoluteRuntime: false,
        corejs: false,
        helpers: true,
        regenerator: false,
        useESModules: runtimeHelpersUseESModules,
        version: runtimeVersion,
      }] : null,
    ].filter(Boolean),
  };
});