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https://github.com/puppeteer/puppeteer
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70 lines
2.3 KiB
Markdown
70 lines
2.3 KiB
Markdown
# Running Puppeteer in the browser
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Puppeteer is a powerful tool for automating browsers, but did you know it can also run within a browser itself? This enables you to leverage Puppeteer's capabilities for tasks that don't require Node.js specific features.
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## Supported Features
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While running in the browser, Puppeteer offers a variety of functionalities including:
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1. WebSocket Connections: Establish connections to existing browser instances using WebSockets. Launching or downloading browsers directly is not supported as it relies on Node.js APIs.
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2. Script Evaluation: Execute JavaScript code within the browser context.
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3. Document Manipulation: Generate PDFs and screenshots of the current web page.
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4. Page Management: Create, close, and navigate between different web pages.
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5. Cookie Handling: Inspect, modify, and manage cookies within the browser.
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6. Network Control: Monitor and intercept network requests made by the browser.
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## How to run Puppeteer in the browser
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:::note
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See https://github.com/puppeteer/puppeteer/tree/main/examples/puppeteer-in-browser for a complete example.
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:::
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To run Puppeteer in the browser, first you need to produce a browser-compatible build using a bundler such as rollup or webpack:
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1. When importing Puppeteer use the browser-specific entrypoint from puppeteer-core `puppeteer-core/lib/esm/puppeteer/puppeteer-core-browser.js'`:
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```ts
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import puppeteer from 'puppeteer-core/lib/esm/puppeteer/puppeteer-core-browser.js';
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const browser = await puppeteer.connect({
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browserWSEndpoint: wsUrl,
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});
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alert('Browser has ' + (await browser.pages()).length + ' pages');
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browser.disconnect();
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```
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2. Build your app using a bundler. For example, the following configuration can be used with rollup:
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```js
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import {nodeResolve} from '@rollup/plugin-node-resolve';
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export default {
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input: 'main.mjs',
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output: {
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format: 'esm',
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dir: 'out',
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},
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plugins: [
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nodeResolve({
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// Indicate that we target a browser environment.
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browser: true,
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// Exclude any dependencies except for puppeteer-core.
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// `npm install puppeteer-core` # To install puppeteer-core if needed.
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resolveOnly: ['puppeteer-core'],
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}),
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],
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};
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```
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:::note
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Do not forget to include a valid browser WebSocket endpoint when connecting to an instance.
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:::
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3. Include the produced bundle into a web page.
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