PuppeteerSharp.Cdp 21.1.0

Puppeteer Sharp

Puppeteer Sharp is a .NET port of the official Node.JS Puppeteer API.

What is Puppeteer Sharp?

Puppeteer Sharp provides a high-level API to control headless Chrome or Chromium over the DevTools Protocol. It can also be configured to use full (non-headless) Chrome or Chromium.

What can you do?

Most things that you can do manually in the browser can be done using Puppeteer Sharp! Here are a few examples:

• Generate screenshots and PDFs of pages
• Crawl a SPA (Single-Page Application) and generate pre-rendered content (i.e. "SSR" (Server-Side Rendering))
• Automate form submission, UI testing, keyboard input, etc.
• Create an up-to-date, automated testing environment
• Capture a timeline trace of your site to help diagnose performance issues
• Test Chrome Extensions

Prerequisites

• Puppeteer-Sharp comes in two flavors: a NetStandard 2.0 library for .NET Framework 4.6.1 and .NET Core 2.0 or greater and a .NET 8 version.
• If you have issues running Chrome on Linux, the Puppeteer repo has a great troubleshooting guide.
• X-server is required on Linux.

Usage

Take screenshots

var browserFetcher = new BrowserFetcher();
await browserFetcher.DownloadAsync();
await using var browser = await Puppeteer.LaunchAsync(
    new LaunchOptions { Headless = true });
await using var page = await browser.NewPageAsync();
await page.GoToAsync("http://www.google.com");
await page.ScreenshotAsync(outputFile);

Generate PDF files

var browserFetcher = new BrowserFetcher();
await browserFetcher.DownloadAsync();
await using var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = true });
await using var page = await browser.NewPageAsync();
await page.GoToAsync("http://www.google.com");
await page.EvaluateExpressionHandleAsync("document.fonts.ready"); // Wait for fonts to be loaded
await page.PdfAsync(outputFile);

Evaluate Javascript

await using var page = await browser.NewPageAsync();
var seven = await page.EvaluateExpressionAsync<int>("4 + 3");
var someObject = await page.EvaluateFunctionAsync<JsonElement>("(value) => ({a: value})", 5);
Console.WriteLine(someObject.GetProperty("a").GetString());

Useful links

• API Documentation
• GitHub Repository
• StackOverflow
• Slack channel #puppeteer-sharp

Support

If you have an issue or a question:

• Ask a question on Stack Overflow
• File a new issue

Contributing

Check out contributing guide to get an overview of Puppeteer Sharp development.