What is the purpose of dynamic CSS class names? - Facebook
: Class names like .rPeRbQET are generated by tools like CSS Modules or Closure Compiler . They are designed to be short to save bandwidth and unique to prevent styling "collisions" where a rule for one component accidentally changes the look of another.
: In Google’s ecosystem, this class is often a "utility class" applied to container elements (like or ) that wrap around search result descriptions or "More info" buttons to ensure they look and behave consistently.