Over some time I have been looking for ideal Cookie Consent Banner implementation on my websites. The main goal was to make sure it’s not causing CLS (Cumulative Layout Shift) resulting in poor Core Web Vitals (and downgrading website in Google Search).
I found the solution that worked for me for some time.
Together with other optimisation works I managed to achieve my goal, however, from time to time I saw a spike in PageSpeed Insight for some pages and I couldn’t figure out what else I could do to make sure that Cookie Banner (Bar) is not causing CLS.