![]() Additionally, if your website uses additional plugins, page builders, or any third-party themes, there might be some unused CSS for features that you don’t use. Generally, this means that there are more chances of unused CSS in it. It’s also possible that your CSS code is larger in size. This is crucial time lost that the user waits to first see content on their screen. This means that the browser downloads the unused CSS files but doesn’t use them anywhere. The “remove unused CSS” warning appears when your web page has some CSS code that’s not essential for first rendering content. What does the “remove unused CSS” warning mean? Subsequently, it’ll take longer to load the required page elements when site visitors first start to download the web page. This means that when CSS files contain unused CSS code along with larger file size, it’ll take longer to build the page’s render tree. The browser needs to first find and download the CSS files that the page needs before it can first start rendering content on the user’s viewport. You don’t want your CSS stylesheets cluttered with unused CSS as it can be difficult to fix bugs later down the road. ![]() Additionally, on the back-end, it makes it harder for developers to manage stylesheets that have unnecessary code in them. This not only affects user experience but also slows down the overall performance of your website and makes it much harder for the browser to load page elements quickly. The more CSS files there are, the longer the user waits before they see any page elements load when they first visit your web page. The browser is required to process and download all external CSS files before it can start rendering content on the user’s screen. Unused CSS might seem like an insignificant issue but the reality is that it negatively affects page speed and other important Core Web Vitals metrics. As a result, it drastically slows down response times and causes a delay in first rendering content on your web page. Since unnecessary CSS is added to the stylesheets, it increases the overall file size. Unused CSS might be one of the most important factors contributing to the slower response and slow page speed on your site. Because of this, some stylesheet elements might still be lingering around in your code even though they’re not in use. In addition to this, unused CSS can also be generated when you add some features to your site during the development phase but forget to remove the CSS code when getting rid of those features. ![]() This means that all the CSS you added previously will not be used with the new design you decide to stick with. in the Customizer) but later decided on a different website design, there is likely to be unused CSS present. That specific code will not be used for users that visit your web page on a desktop device. For instance, CSS code in your site’s stylesheets may have additional CSS code for mobile devices and tablet users visiting your site. This is because sometimes a page element is specified in the code but not used in the page the user is on. However, it’s completely normal to have some unused CSS in some parts of the code that makes up your web pages. Unused CSS is the code in stylesheets that is not used to style any page element necessary to first render content on the page. In this article, we’ll explain how you can fix the “remove unused CSS” warning from the Google PageSpeed Insights test. You have to remove unused CSS to optimize your web page and ensure it loads quickly when a visitor accesses it. Any unused CSS on your page can cause a delay in first rendering content because it takes more time for the browser to process and download the needed CSS files.
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