December 2014
Beginner to intermediate
179 pages
4h 11m
English
Content preview from Designing for PerformanceBecome 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,
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.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.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.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.
Chapter 4. Optimizing Markup and Styles
While images make up the majority of most sites’ page weight, the HTML and CSS that call and implement these images also impact total page load time. The way that you structure and name your markup can help you keep your site maintainable and high performing; intentional organization of your CSS and design patterns will allow you to focus on repurposability and the meaning behind your site’s look and feel. Keeping both your HTML and CSS clean and meaningful will result in a faster-loading site and a better overall user experience. In this chapter, we will cover best practices for loading HTML, CSS, fonts, and JavaScript on your site.
Cleaning Your HTML
Clean HTML is the foundation for a high-performing site. Though older sites tend to suffer from multiple designers or developers editing and adding to markup, even newer sites can benefit from a clean sweep—looking for embedded or inline styles, unused or unnecessary elements, and poorly named classes and IDs.
In Chapter 1, I mentioned that I was able to cut page load time in half for one site by simply cleaning up its markup and styles. I focused on killing bloated HTML and CSS, which resulted in smaller HTML, CSS, and stylesheet image file sizes.
When looking at your site’s HTML, watch for:
Embedded or inline styles that should be moved to a stylesheet
Elements that have no need for special styling (unnecessary HTML elements, also known as “divitis” and covered in the next section)
Old, commented-out ...
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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.