Eliminating flash of unstyled content fouc in asp net core 5 mvc

Introduction

One common issue that developers face when working with ASP.NET Core 5 MVC is the of unstyled content (FOUC). This occurs when the browser briefly displays the page without any before the CSS. In this article, we will explore different techniques to eliminate FOUC in ASP.NET Core 5 MVC, along with examples.

Method 1: Inline CSS

One way to prevent FOUC is by using inline CSS. By including the CSS directly in the HTML markup, the browser will apply the styles immediately, avoiding the flash of unstyled content. Here's an example:


Welcome to My Website

Lorem ipsum dolor sit amet, consectetur adipiscing elit.

Method 2: Critical CSS

Another approach to eliminate FOUC is by using critical CSS. Critical CSS refers to the minimal set of CSS required to render the above-the-fold content of a web page. By including this critical CSS inline, the browser can apply the necessary styles immediately. Here's an example:




Welcome to My Website

Lorem ipsum dolor sit amet, consectetur adipiscing elit.

Method 3: Preloading CSS

Preloading CSS is another technique to eliminate FOUC. By adding a link tag with the “preload” attribute in the head of the HTML, the browser can and the CSS file before rendering the page. Here's an example:

Conclusion

Eliminating the flash of unstyled content (FOUC) in ASP.NET Core 5 MVC is crucial for providing a seamless user . In this article, we explored three different techniques to tackle this issue: inline CSS, critical CSS, and preloading CSS. By implementing techniques, you can ensure that your web are displayed with the intended styles from the moment they load.

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