If you've ever tried to take a full-page screenshot of a modern website programmatically, you've...
Playwright: scrollHeight unreliable on dynamic pages; track window.scrollY changes instead of calculating steps upfront. Web automation teams—observed behavior beats static DOM measurements on third-party sites; lazy-loaded content makes single-point readings untrustworthy.
If you've ever tried to take a full-page screenshot of a modern website
programmatically, you've probably run into the same wall I did:
document.body.scrollHeight lies. Constantly.
The problem
Lazy-loaded images, infinite scroll sections, sticky headers, scroll-triggered
You set up Puppeteer, navigate to a page, call page.screenshot(), and the bottom half of your image...
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I think you all know the overscroll rubber-banding effect: when you scroll past the end of a page, or...
