I'm looking for something similar that can also extract the diff of content on the page over time, in addition to screenshots. Any suggestions?
I have a homegrown solution using an LLM and scrapegraphai for https://getchangelog.com but would rather offload that to a service that does a better job rendering websites. There's some websites that I get error pages from using playwright, but they load fine in my usual Chrome browser.
Good point on offloading it as for the amount of work that's required in setting up a wrapper for something like Puppeteer, Playwright etc that also works with a probably quite specific setup, I've found the best way to get a quality image consistently is to just subscribe to one of the many SASS' out there that already do this well. Some of the comments above suggest some decent screenshot-as-a-service products.
Really depends on how valuable your time is over your (or your companies) money. I prefer going for the quality (and more $) solution rather than the solution that boasts cheap prices, as I tend to avoid headaches of unreliable services. Sam Vines Boots theory and all that.
For image comparison I've always found using pixelmatch by Mapbox works well for PNG's
The easiest solution to this is probably extracting / formatting the content, then running a diff on that. Otherwise you could use snapshot testing algorithms as a diffing method. We use browserbase and olostep which both have strong proxies (first one gives you a playwright instance, second one just screenshot + raw HTML).
I have a homegrown solution using an LLM and scrapegraphai for https://getchangelog.com but would rather offload that to a service that does a better job rendering websites. There's some websites that I get error pages from using playwright, but they load fine in my usual Chrome browser.