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/**
* 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.
*/
'use strict';
const puppeteer = require('puppeteer');
(async () => {
const browser = await puppeteer.launch();
const page = await browser.newPage();
// Define a window.onCustomEvent function on the page.
await page.exposeFunction('onCustomEvent', e => {
console.log(`${e.type} fired`, e.detail || '');
});
/**
* Attach an event listener to page to capture a custom event on page load/navigation.
* @param {string} type Event name.
* @returns {!Promise}
*/
function listenFor(type) {
return page.evaluateOnNewDocument(type => {
document.addEventListener(type, e => {
window.onCustomEvent({type, detail: e.detail});
});
}, type);
}
await listenFor('app-ready'); // Listen for "app-ready" custom event on page load.
await page.goto('https://www.chromestatus.com/features', {
waitUntil: 'networkidle0',
});
await browser.close();
})();
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