AppCode is an Objective-C IDE. It supports web code, for they are frequently embedded in apps, but not pure web project.
You can either use WebStorm, or open a dummy iOS project and disregard non-web parts.
Question
Is it possible to create a web project (HTML, JavaScript, CSS) in Jetbrains AppCode IDE?
On the Features page there is following information:
AppCode also fully supports JavaScript, XML, HTML, CSS and XPath including all code editing and transformation features like syntax highlighting, analysis, completion, navigation and refactoring.
However I see only iOS and OS X when I use File > New Project... in AppCode 2.5.5.
OTHER TIPS
Why not just create Empty Project ? And then fill it static resources.