https://developer.mozilla.org/en-US/docs/Web/CSS/::before bolo preskúmané 549 krát od 7 októbra, 2016. (338 krát v roku 2025)
Prieskum môže byť duplikátom predchádzajúceho. Stáva sa to asi v 25% prípadoch z 420,000,000 stránok.Dokumentácia
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Poznámka
Tento kalendárový pohľad mapuje koľkokrát https://developer.mozilla.org/en-US/docs/Web/CSS/::before bola preskúmaná, nie koľkokrát bola stránka aktualizovaná.