Imagine clicking a button, and when the page fully loads, the button unexpectedly disappears and moves to the bottom. CLS in large quantities can be very frustrating. For the best user experience, Google recommends that your CLS score be less than 0.1 Steps to improve CLS Google places a lot of importance on content and how interactive it is with the user. If the user does not interact with the content of your website, it will demonstrate how insecure your content and elements are. For this very reason, CLS has been included in Core Web Vitals for SEO. Google believes that CLS may occur due to the following reasons Web fonts causing FOIT/FOUT Dimensionless images dynamic content Dimensionless iframes and embeds Let’s analyze each of these scenarios in detail.
Web fonts causing Flash of invisible text (FOIT) and Flash of unstyled text (FOUT) Some websites use web fonts for their pages. Everything works great if the fonts are loaded Hungary Phone Number on time and displayed to the user. But, if your page speed is slow, these web sources lead to FOIT/FOUT. On FOUT, until the original web font is fully loaded, it is swapped with a new temporary font. This new font is called FOIT. And, FOIT is the new temporary invisible text that is displayed until the font is fully loaded. This “invisible” text is called FOUT. Google recommends using the <link rel=preload> attribute on your page. With rel=preload, you can preload important web fonts. This way the original font will be replaced by the temporary font and text during the first paint.
While the Second Search Is Clearly About Product
This will result in no design changes. Dimensionless images Images are sometimes declared in the website code without the height and width attributes. This is the biggest culprit for CLS as the browser doesn’t know how much space to allocate to images. It gives the space to another element, and when the page is fully loaded, the element will be repositioned again. Google recommends using aspect ratio boxes to resolve this issue. With the aspect ratio boxes, you can define the aspect ratio your image will take and the browser will allocate the space accordingly. Even if you’re using responsive web design, Google still recommends using “srcset” to define the height and width attributes of images.
Dynamically generated content affects CLS. Dynamic content (also known as adaptive content) is when content changes in real time based on user interactions, interests, and behavior. For example, if you open an e-commerce site and click on a product, suddenly a dynamic content/banner will appear notifying you that the product is out of stock. Another example would be when you scroll down and suddenly the static content transforms into a dynamic widget, gif, or video. Dynamic content is good for user interactivity, but can have adverse effects on CLS if not done correctly.
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It results in a lot of design changes, as the content keeps changing. If you want to include such dynamic content, Google’s advice is to reserve enough space for them in the viewport. You can use placeholders to tell the browser that some dynamic content is coming and reserve space for it. This will result in fewer design changes. Dimensionless iframes and embeds Embeds and iframes are commonly used on websites to display audio, video, or text widgets. These embeds can be YouTube videos, an audio podcast, maps, or a social media post on the page.
