"Yes, the shopping crawler has to consume shopping structured data incredibly fast so it has up-to-date pricing, inventory, availability and so forth for the Google Shopping Graph. Because of the speed and quanity of feeds it needs to consume over-and-over again, it does not have time to wait for JavaScript to dynamically generated the structured data."
"This is different from how normal Googlebot and Google Search handles it. Googlebot for Search will wait and consume your JavaScript to wait for it to render the structured data. Google Shopping won't process structured data loaded through JavaScript because Shopping crawls a lot, fast, because it needs real time pricing/availability. It is different from Google Search.- Barry Schwartz (@rustybrick) December 9, 2025"
"Is client side rendered JS bad for structured data? In search: they're parsing it. This invites drift tough if you have any content gap and is reflected in the page. They should be aligned. For shopping : it's different because they crawl a lot. If they have to crawl... pic.twitter.com/06q9sggrwK- Aleyda Solis 🕊️ (@aleyda) December 9, 2025"
The Google Shopping crawler requires structured product data to be available immediately and does not wait for client-side JavaScript rendering. The crawler ingests large volumes of shopping feeds rapidly to keep pricing, inventory, and availability current in the Google Shopping Graph. Because of that speed and quantity, dynamically generated structured data can be missed or stale when relied on solely through JavaScript. Googlebot for Search behaves differently and will wait for JavaScript to render structured data. Site owners should provide server-rendered markup or feeds to ensure accurate, timely shopping data indexing.
Read at Search Engine Roundtable
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