CSS loading and Critical CSS

CSS loading and Critical CSS

Solving for CSS loading optimizations



Sourabh Kumar


Critical CSS - The What, Why & How?

Submitted Aug 31, 2021

Before getting to the fulfilment of any subject, it is important to understand the requirement that led to its inception. So this talk will dwell on the fundamentals of,

  • CSSOM,
  • Render-blocking resources
  • Page performance measurement metrics
  • Key improvement areas for overall and perceived performance
  • CSS extraction techniques for better speed and UX,
  • Frameworks/libraries implementing those techniques along with the pros & cons list
  • The best practices to follow for implementation.

After this session, you should have an understanding

  • To assess the relevance of a particular optimisation against their project context.
  • To measure the degree of its applicability.
  • To identify resources and directions to explore to achieve the same.


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