How to Highlight Code Snippets Inside Iframe Mode

You’ve styled your code snippets beautifully in Froala’s normal mode. Syntax highlighting works. Everything looks professional. Then you switch to iframe mode for security and isolation, and your code snippets turn into plain, unstyled text. This isn’t a bug. It’s the nature of iframes: they’re sandboxes. Styles don’t cascade across the boundary. But Froala offers an easy solution to this, and it’s worth solving because iframe mode offers real protection and stability that normal mode can’t match. This guide shows you exactly why this happens and how to make code snippets look great in iframe mode. Key Takeaways The Code Snippet plugin uses Prism.js for syntax highlighting. Prism must be loaded on the page for the plugin to work. Iframe mode isolates content, so styles stay scoped to each document. You must inject stylesheets into the iframe for highlighting to work. Use iframeStyleFiles as your primary solution. It’s the recommended, cleanest way to load external stylesheets like Pris