index.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 {helper} = require('./lib/helper');
const api = require('./lib/api');
const {Page} = require('./lib/Page');
for (const className in api) {
  // Puppeteer-web excludes certain classes from bundle, e.g. BrowserFetcher.
  if (typeof api[className] === 'function')
    helper.installAsyncStackHooks(api[className]);
}

// Expose alias for deprecated method.
Page.prototype.emulateMedia = Page.prototype.emulateMediaType;

// If node does not support async await, use the compiled version.
const Puppeteer = require('./lib/Puppeteer');
const packageJson = require('./package.json');
let preferredRevision = packageJson.puppeteer.chromium_revision;
const isPuppeteerCore = packageJson.name === 'puppeteer-core';
// puppeteer-core ignores environment variables
const product = isPuppeteerCore ? undefined : process.env.PUPPETEER_PRODUCT || process.env.npm_config_puppeteer_product || process.env.npm_package_config_puppeteer_product;
if (!isPuppeteerCore && product === 'firefox')
  preferredRevision = packageJson.puppeteer.firefox_revision;

const puppeteer = new Puppeteer(__dirname, preferredRevision, isPuppeteerCore, product);

// The introspection in `Helper.installAsyncStackHooks` references `Puppeteer._launcher`
// before the Puppeteer ctor is called, such that an invalid Launcher is selected at import,
// so we reset it.
puppeteer._lazyLauncher = undefined;

module.exports = puppeteer;