Question

How do I prevent FOUC (Flash of Unstyled Content) in an accordion snippet?

Answer 1

FOUC occurs when the unstyled accordion content briefly appears before JavaScript loads. To prevent this:

• Add a class="hidden" or style="opacity:0" directly in the HTML.
• Use JavaScript event listeners to reveal content only after the page has fully loaded.
• Minify and defer CSS and JavaScript files for faster rendering.
• Preload critical CSS using <link rel="preload">.