I don't think this site was the work of an LLM. I think it was the result of somebody who just learned frontend JavaScript trying to hack together a website and business, with next to no practical knowledge.
There's all sorts of weird stuff, and it definitely looks like the kind of thing you'd see a beginner copy-pasting code and trying things out would create. The site sets a cookie containing the key-value pair "key":"value", for example.
This was at a small logistics company you’ve never heard of (read: not the best development practices) so the habit was eventually caught in a code review and corrected. I must have written a dozen or so of those prior to that.
There's all sorts of weird stuff, and it definitely looks like the kind of thing you'd see a beginner copy-pasting code and trying things out would create. The site sets a cookie containing the key-value pair "key":"value", for example.