13e8580a34
This patch:
- split browser launching logic from Browser into `lib/Launcher.js`
- introduce `puppeteer` namespace which currently has a single `launch`
method to start a browser
With this patch, the browser is no longer created with the `new
Browser(..)` command. Instead, it should be "launched" via the
`puppeteer.launch` method:
```js
const puppeteer = require('puppeteer');
puppeteer.launch().then(async browser => {
...
});
```
With this approach browser instance lifetime matches the lifetime of
actual browser process. This helps us:
- remove proxy streams, e.g. browser.stderr and browser.stdout
- cleanup browser class and make it possible to connect to remote
browser
- introduce events on the browser instance, e.g. 'page' event. In case
of lazy-launching browser, we should've launch browser when an event
listener is added, which is unneded comlpexity.
41 lines
1.2 KiB
JavaScript
41 lines
1.2 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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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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await page.goto('https://google.com', {waitUntil: 'networkidle'});
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// Type our query into the search bar
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await page.type('puppeteer');
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await page.click('input[type="submit"]');
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// Wait for the results to show up
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await page.waitForSelector('h3 a');
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// Extract the results from the page
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const links = await page.evaluate(() => {
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const anchors = Array.from(document.querySelectorAll('h3 a'));
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return anchors.map(anchor => anchor.textContent);
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});
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console.log(links.join('\n'));
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browser.close();
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})();
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