puppeteer/examples/search.js
Andrey Lushnikov 13e8580a34 Use puppeteer.launch instead of browser constructor (#255)
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.
2017-08-14 18:08:06 -07:00

41 lines
1.2 KiB
JavaScript

/**
* 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 puppeteer = require('puppeteer');
(async() => {
const browser = await puppeteer.launch();
const page = await browser.newPage();
await page.goto('https://google.com', {waitUntil: 'networkidle'});
// Type our query into the search bar
await page.type('puppeteer');
await page.click('input[type="submit"]');
// Wait for the results to show up
await page.waitForSelector('h3 a');
// Extract the results from the page
const links = await page.evaluate(() => {
const anchors = Array.from(document.querySelectorAll('h3 a'));
return anchors.map(anchor => anchor.textContent);
});
console.log(links.join('\n'));
browser.close();
})();