December 2016
Intermediate to advanced
376 pages
13h 49m
English
Content preview from Web Performance in ActionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 4. Understanding critical CSS
This chapter covers
- Understanding critical CSS and the problem that it solves
- Understanding how critical CSS works
- Using critical CSS in your projects
- Knowing the benefits of critical CSS before and after implementation
With some CSS optimization techniques under your belt, it’s a good time to learn an advanced CSS optimization task that speeds up the rendering of a page by prioritizing rendering of above-the-fold content. This technique is called critical CSS.
4.1. What does critical CSS solve?
Critical CSS is an optimization task that enables you to rethink how CSS is loaded by the browser by prioritizing the CSS for above-the-fold content ahead of below-the-fold content. When done properly, the ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.