What’s the Impact of Webfont Load on Performance? Let’s see the actual impact of webfonts on performance. This webfont issue affects the speed of your page because some browsers will hide all the text while this “loading font time” is happening. To find out, Lighthouse runs through all the web fonts displayed in the CSS and checks if one of the font-display attributes has been specified for each web font. The “ensure text remains visible during webfont load” warning will trigger if Lighthouse finds one web font URL without one of the attributes below: What Exactly Triggers This PageSpeed Insights Warning? □ “Ensure text remains visible during Webfont load” = Text should be user-visible even while web fonts are loading. URL on your site using a font URL that is flashing invisible text – Source: PSI In the example below, the actual text has loaded and can be highlighted, but it remains invisible as the webfont has not fully loaded yet: Flash of Invisible Text instead of displaying “This is my text” – Source: WP RocketĪs a consequence, Lighthouse will flag any font URLs that flash this invisible text. What Is Flash of Invisible Text (FOIT)?įOIT (flash of invisible text) happens if the browser waits too long to load a webfont. To deal with this loading gap, some browsers hide the text until the fonts are loaded, causing a flash of invisible text (FOIT). What Ensure Text Remains Visible During Webfont Load MeansĮnsuring that text remains visible during webfont load means that the text on a webpage should never be hidden, even if the web font has not loaded yet. We also show you how to fix the issue manually or by using a WordPress plugin. In this article, we explain what the PageSpeed Insights warning means and what’s the impact on performance. Web fonts vs system fonts – Source: WP Rocket This rule tells the browser which web font to download to apply the proper custom font to a string of text. On the other hand, web fonts are specifically made for use on the internet and can be loaded with the CSS” declaration. The first one is designed to be installed and read on your computer with extensions like. There are two types of fonts: the system fonts and the webfonts. This takes time and Lighthouse triggers a warning if a website does not effectively load web fonts. When you use a web font like Font Awesome, Adobe Font, or Google Fonts, they don’t exist on the visitor’s computer: they have to be downloaded from the internet. “Ensure text remains visible during webfont load” warning – Source: PageSpeed Insights If you have ever run a performance audit on PageSpeed insights, Lighthouse may have recommended to “ensure text remains visible during webfont load”. How to Make Fewer HTTP Requests on WordPress and Speed Up Your Site.Critical CSS in WordPress: What It Is and How to Optimize CSS Delivery.How to Defer Parsing of JavaScript in WordPress (Manually and with a Plugin).How to Reduce the Impact of Third-Party Scripts on WordPress.The 13 Critical Website Performance Metrics Worth Monitoring.How to Improve Time to Interactive (TTI) on WordPress.10 Proven Ways To Improve First Contentful Paint (FCP) in WordPress.How to Reduce Total Blocking Time (TBT) on WordPress.
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