Carousels are killing our Core Web Vitals scores

So, we’re all familiar with the Core Web Vitals scores, right? Just in case we’re not, lets recap. These are scores that Google uses to just the speed of your page. It’s more than just “How much data” does the page use, or “When is the DOM ready”, but also includes things like “When is the content painted on the page” and “How much does stuff shift as the page is loaded”.

This is actually really good, as these are much better metrics; people want your page to read, and these metrics focus on that.

So, one of the things I’ve noticed is that a number of our customers are not getting great scores for the Largest Contentful Paint (LCP) – and this seems to be due to a particular bugbear of mine – carousels.

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Carousels are killing our Core Web Vitals scores