Does your content travel well? Can your site’s design and behavior survive from one platform to another, one browser to another, one configuration to another, across existing and future networked devices? “Write once, publish everywhere” is the goal. Are we there yet? Web standards and testing methods. QA and workflow. Bugs and features in desktop and mobile browsers. Vendors and standards bodies, experimentation and support.
Request with Intent: Caching Strategies in the Age of PWAs
Caching media files, especially images, seems like an obvious way to improve performance, but should we? To provide a more performant UX without abusing users’s network connections or hard drives, Aaron Gustafson puts a spin on classic best practices, experiments with media caching strategies, and shares smart Cache API tricks.
Semantics to Screen Readers
As an extension to our From URL to Interactive series, designer and front-end developer Melanie Richards takes a deep dive into how our content is accessed by a wide array of screen readers, which are highly customizable to users. Understanding the nuances of accessibility APIs, thorough testing approaches, and the wealth of resources available, site creators can create the most widely accessible content for the most users possible.
var to JIT
Braces to Pixels
We continue on A List Apart’s four-part “From URL to Interactive” series with Greg Whitworth, a member of the W3C CSS Working Group and the CSS Houdini Task Force. He’ll walk through how CSS is parsed, how values are computed, and what the “cascade” in style sheets actually means. Then we’ll discuss layout, painting, and composition. Brace yourselves, we’re about to drive through a one of our most scenic and winding parts of our journey.
Tags to DOM
In the second installment of A List Apart’s four-part “From URL to Interactive” series, Travis Leithead, former editor of W3C’s HTML spec, walks us through the process of parsing HTML: from how browsers create trees to how the DOM responds to events. Equipped with this knowledge, you’ll be able to make smarter DOM decisions, reduce time to interactive, and eliminate unintended reflows.
From URL to Interactive
Server to Client
Kicking off the first installment in our “From URL to Interactive” series, Ali Alabbas takes us through the journey of how our code makes it to the browser. In “Server to Client”, he discusses how server connections are made, caching, and how service workers factor into the request and response process. You don’t want to miss this master class from a networking expert; grasping this aspect of how things run under the browser hood is essential to understanding performance.
The `img` element remains one of the biggest challenges for website performance, especially in responsive designs. In this excerpt from Image Performance, Mat Marquis tells us why, but he also shines a light on the solution.