WebPageTest’s new Opportunities and Experiments: test practically anything
Learn what you can do with the new and incredibly useful test tools from WebPageTest – with no coding required.
Detlef Johnson is the SEO for Developers Expert for Search Engine Land and SMX. He is also a member of the programming team for SMX events and writes the SEO for Developers series on Search Engine Land. Detlef is one of the original group of pioneering webmasters who established the professional SEO field more than 25 years ago. Since then he has worked for major search engine technology providers such as PositionTech, managed programming and marketing teams for Chicago Tribune, and advised numerous entities including several Fortune companies. Detlef lends a strong understanding of Technical SEO and a passion for Web development to company reports and special freelance services.
Learn what you can do with the new and incredibly useful test tools from WebPageTest – with no coding required.
Detlef Johnson | Jun 7, 2022 at 2:02 pm ETThe HTMLRewriter() API gives us the ability to use jQuery-style element selectors to attach to HTML elements in raw page source to run JavaScript from that foothold.
Detlef Johnson | Feb 3, 2022 at 1:26 pm ETIn this article, we demonstrate an evolution from an original concept for a testbed to a project suitable for our future events and articles.
Detlef Johnson | Jan 24, 2022 at 2:55 pm ETHere is how to test Core Web Vitals scores and code changes using Cloudflare Workers as a reverse proxy and WebpageTest.
Detlef Johnson | Jan 12, 2022 at 9:48 am ETField data, considered towards rankings, will vary depending on real-world user device power, screen size, and network connectivity. Lab data has default values for these and, (except in the case of Page Speed Insights), can be calibrated by developers to simulate all manner of conditions.
Detlef Johnson | Jun 8, 2021 at 10:22 am ETFor technical SEO practitioners and site developers alike, we can glean a lot from the announcements the Chrome team made about the availability of technologies and extensions to their current products in the "What's new for The Web Platform" keynote.
Detlef Johnson | May 26, 2021 at 5:16 pm ETAndroid Chrome 88 and desktop Chrome 91, plus Firefox 79+ now implement SharedArrayBuffers again after Spectre caused a multiyear security blackout on the feature until new security requirements were in place.
Detlef Johnson | Mar 16, 2021 at 12:07 pm ETUnknowing developers that search forums for script help can fall victim to Gootkit trojan and ransomware attacks
Detlef Johnson | Mar 3, 2021 at 1:56 pm ETChrome 88 allows you to view your site's LCP, FIP, and CLS data in dev tools.
Detlef Johnson | Jan 22, 2021 at 11:57 am ETLighthouse now serves as a beacon for warning you when your project includes old libraries that have modern alternatives.
Detlef Johnson | Jan 5, 2021 at 2:41 pm ETHow to get SEO-friendly website pages to feel like there's magic burbling up beneath them.
Detlef Johnson | Oct 20, 2020 at 10:51 am ETThe new releases are from Google's Search Open Sourcing team.
Detlef Johnson | Sep 23, 2020 at 8:15 am ETLive with Search Engine Land: SEO Developers tackle server side rendering (SSR) with lively discussion around communicating technical SEO with developers.
Detlef Johnson | Aug 20, 2020 at 2:26 pm ETWhat you need to know about Google’s latest set of key user experience metrics for Web Developers.
Detlef Johnson | Jul 21, 2020 at 3:07 pm ETHow to address the technical limitations in Shopify to improve your store’s search visibility.
Detlef Johnson | May 28, 2020 at 8:00 am ETNow marketers know how their days are numbered.
Detlef Johnson | Apr 10, 2020 at 12:54 pm ETAn explanation of asynchronous JavaScript using Fetch API for getting JSON data to the screen.
Detlef Johnson | Apr 1, 2020 at 8:00 am ETWhy can't computers read human language? Why do some source files look like crazy character noise? Are computer programmers magicians?
Detlef Johnson | Mar 31, 2020 at 10:30 am ETGoogle wants Chrome team products widely distributed and that includes Firefox.
Detlef Johnson | Feb 28, 2020 at 7:48 am ETRather than automatically changing default search engines for Chrome and Firefox, administrators are required to opt-in for it to do so network-wide.
Detlef Johnson | Feb 13, 2020 at 4:14 pm ET