navigation-stack/src/session/lifecycle/page-lifecycle/supportsConstructableEventTarget.js

Handles navigation in a web browser

/*
 Copyright 2018 Google Inc. All Rights Reserved.
 Licensed 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.
*/

function doesSupportConstructableEventTarget() {
  try {
    // eslint-disable-next-line no-unused-vars
    const eventTarget = new EventTarget();

    // When transpiled with babel and rollup, the `IS_CODE_TRANSPILED` constant
    // is replaced with the boolean `true`, so this statement will always
    // evaluate to `false`. When not transpiled, it will be true.
    return typeof IS_CODE_TRANSPILED === 'undefined';
  } catch (err) {
    return false;
  }
}

const supportsConstructableEventTarget = doesSupportConstructableEventTarget();

export { supportsConstructableEventTarget };