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/**
* @license
* Copyright 2017 Google Inc.
* SPDX-License-Identifier: Apache-2.0
*/
'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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