Web Vitals. Optimizing for quality of user experience is key to the long-term success of any site on the web.
Whether you're a business owner, marketer, or developer, Web Vitals can help you quantify the experience of your site and identify opportunities to improve. Overview # Web Vitals is an initiative by Google to provide unified guidance for quality signals that are essential to delivering a great user experience on the web. Google has provided a number of tools over the years to measure and report on performance. Some developers are experts at using these tools, while others have found the abundance of both tools and metrics challenging to keep up with. Site owners should not have to be performance gurus in order to understand the quality of experience they are delivering to their users. Core Web Vitals # Core Web Vitals are the subset of Web Vitals that apply to all web pages, should be measured by all site owners, and will be surfaced across all Google tools. Dropping Support For IE11 Is Progressive Enhancement · The Ethically-Trained Programmer.
What's New In DevTools (Chrome 59) Welcome to another installment of the DevTools release notes.
Watch the video below or read on to see what's new in Chrome DevTools in Chrome 59! CSS and JS code coverage. Find unused CSS and JS with the new Coverage tab.Full-page screenshots. Take a screenshot of the entire page, from the top of the viewport to the bottom.Block requests. Manually disable individual requests in the Network panel.Step over async await. Find unused CSS and JS code with the new Coverage tab. Clicking on a URL reveals that file in the Sources panel with a breakdown of which lines of code executed. Each line of code is color-coded: Solid green means that line of code executed.Solid red means it did not execute.A line of code that is both red and green, such as line 3 in Figure 2, means that only some code on that line executed. To open the Coverage tab: Tools for Web Developers
Lighthouse is an open-source, automated tool for improving the quality of web pages.
You can run it against any web page, public or requiring authentication. It has audits for performance, accessibility, progressive web apps, SEO and more. You can run Lighthouse in Chrome DevTools, from the command line, or as a Node module. You give Lighthouse a URL to audit, it runs a series of audits against the page, and then it generates a report on how well the page did. From there, use the failing audits as indicators on how to improve the page. 3G and 4G LTE Cell Coverage Map - OpenSignal. Google Developers. The mobile web is too slow.
Over the years the web has evolved from a document-centric platform to a first-class application platform. Thanks to advancements in the platform itself (such as Service Workers) and in the tools and techniques we use to build apps, users can do virtually anything on the web they can do in a native app. At the same time, the bulk of our computing has moved from powerful desktop machines with fast, reliable network connections to relatively underpowered mobile devices with connections that are often slow, flaky or both. This is especially true in parts of the world where the next billion users are coming online.