babel.config.js

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

module.exports = function (api) {
  api.cache(false);

  const presets = [
    [
      '@babel/preset-env',
      {
        "useBuiltIns": "entry",
        "corejs": 3,
        "forceAllTransforms": true,
        "targets": {
          "ie": "11"
        }
      }
    ]
  ];
  const plugins = [];

  return {
    presets,
    plugins
  };
}