Deep Dive Topics

Why getByRole Beats CSS Selectors in Modern Apps

Why getByRole Beats CSS Selectors in Modern Apps Modern component frameworks generate DOM that no longer looks like the HTML a developer wrote. Bundlers hash class names, CSS-in-J...

Waiting Strategies for Dynamic React Components

Waiting Strategies for Dynamic React Components React rarely hands you a stable DOM. Fiber reconciliation detaches and re-attaches nodes during state transitions, Suspense swaps a...

Automating Shadow DOM Elements with Playwright

Automating Shadow DOM Elements with Playwright Selectors built on document.querySelector stop at the shadow boundary, so a CSS or XPath string that targets a node inside a web com...

Piercing Nested Shadow DOM Components

Piercing Nested Shadow DOM Components Web-component frameworks like Lit and Stencil compose UIs from custom elements that each hide their internals behind a shadow root, and those...

Handling Rate Limits and Retries When Scraping

Handling Rate Limits and Retries When Scraping A scraper that ignores rate limits fails twice: it gets blocked, and it burdens the server it depends on. When a site returns HTTP 4...

Scraping Infinite Scroll Pages with Playwright

Scraping Infinite Scroll Pages with Playwright An infinite-scroll feed never exposes its full dataset in the DOM at once. New items appear only when you scroll near the bottom, an...

Extracting Tables and Lists to JSON with Playwright

Extracting Tables and Lists to JSON with Playwright HTML tables and lists are the most common shape of structured data on the web — pricing grids, sortable reports, leaderboards, ...

Scraping Data Behind Login Sessions

Scraping Data Behind Login Sessions Much of the most valuable data lives behind a login — account dashboards, order histories, members-only reports. Logging in on every extraction...