browser-automation
Browser automation powers web testing, scraping, and AI agent interactions. The difference between a flaky script and a reliable system comes down to understanding selectors, waiting strategies, and anti-detection patterns. This skill covers Playwright (recommended) and Puppeteer, with patterns for testing, scraping, and agentic browser control. Key insight: Playwright won the framework war. Unless you need Puppeteer's stealth ecosystem or are Chrome-only, Playwright is the better choice in 202
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Browser Automation - A Practical Guide to Playwright and Puppeteer
Skill Overview
Browser automation skills cover complete solutions for web testing, web crawling, and AI agent browser control, focusing on selector strategies, automatic waiting mechanisms, and anti-detection modes in Playwright and Puppeteer.
Applicable Scenarios
For long-term stable crawling projects that need to handle dynamically rendered pages, bypass anti-scraping mechanisms, and simulate real user behavior—especially sites that require login or complex interactions.
UI automation for web applications, E2E regression testing, and cross-browser compatibility testing, addressing failure rates caused by brittle test scripts and improper waiting strategies.
Scenarios where AI agents need to interact with web pages, perform user actions, and retrieve page content, such as intelligent form filling, automated workflows, and browser-based RAG systems.
Core Features
Teaches how to avoid common causes of automation failures (wrong selectors, missing waits, detection systems) by using test isolation, user-perspective locators, and automatic waiting patterns to build scripts that run stably over the long term.
Covers practical techniques for both frameworks, including browser context management, anti-scraping countermeasures, concurrency control, resource interception, and more, helping to understand why Playwright became the preferred solution in 2024.
Provides practical techniques against modern site detection systems—such as browser fingerprint spoofing, request delay control, and behavior pattern simulation—to make automation scripts behave more like real users.
Frequently Asked Questions
Which should I choose, Playwright or Puppeteer?
Unless you have special constraints (such as needing Chrome-specific APIs or relying on the stealth plugin in the Puppeteer ecosystem), Playwright is recommended in 2024. Playwright has advantages in cross-browser support, automatic waiting mechanisms, API design, documentation quality, and community activity, and is maintained more stably.
Why are my browser automation scripts always unstable?
Most failures stem from three reasons: selectors that rely too much on DOM structure (use user-perspective locators), improper waiting strategies (let the framework wait automatically instead of hardcoding delays), and state pollution between tests (create an isolated browser context for each test). This course will explain the correct approaches to these patterns one by one.
How can I prevent crawlers from being detected and blocked by websites?
Use multi-layered protection: employ realistic browser fingerprints (possible via the stealth plugins in playwright-extra or puppeteer-extra), control request rates and randomize delays, simulate real user mouse movements and scrolling behavior, use a proxy IP pool, and manage cookies and localStorage carefully. Also understand that no solution is 100% effective—the best strategy is to reduce request frequency and comply with the site's robots.txt.