puppeteer/phantom_shim/utilities.js

/**
 * Copyright 2017 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.
 */

const loopWhile = require('deasync').loopWhile;

module.exports = {
  await: function(promise) {
    let error;
    let result;
    let done = false;
    promise.then(r => result = r)
        .catch(err => error = err)
        .then(() => done = true);
    loopWhile(() => !done);
    if (error)
      throw error;
    return result;
  }
};