I’m 40% way through the HTML & CSS module and am enjoying it so far, but out of curiosity I wanted to open my projects in a browser. I’ve only yet coded HTML & CSS pages in the freeCodeCamp IDE so don’t know yet how to actually open the HTML pages locally while still keeping CSS formatting.
You would need to save the HTML and CSS to files on your computer. Put them in the same directory. Make sure you name the CSS file “styles.css”. Then you can open the HTML file through your browser.
Or you could definitely view them through VSC as @Uy_Scuti said above.