mirror of
https://github.com/puppeteer/puppeteer
synced 2024-06-14 14:02:48 +00:00
51 lines
1.4 KiB
JavaScript
51 lines
1.4 KiB
JavaScript
/**
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* Copyright 2017 Google Inc. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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const puppeteer = require('puppeteer');
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(async() => {
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const browser = await puppeteer.launch();
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const page = await browser.newPage();
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// Define a window.onCustomEvent function on the page.
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await page.exposeFunction('onCustomEvent', e => {
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console.log(`${e.type} fired`, e.detail || '');
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});
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/**
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* Attach an event listener to page to capture a custom event on page load/navigation.
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* @param {string} type Event name.
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* @return {!Promise}
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*/
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function listenFor(type) {
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return page.evaluateOnNewDocument(type => {
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document.addEventListener(type, e => {
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window.onCustomEvent({type, detail: e.detail});
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});
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}, type);
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}
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await listenFor('app-ready'); // Listen for "app-ready" custom event on page load.
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await page.goto('https://www.chromestatus.com/features', {waitUntil: 'networkidle'});
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await browser.close();
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})();
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