CoffeeScript JSX (CJSX) Syntax support for JetBrains IDEs, such as WebStorm, PhpStorm, and Intellij IDEA. This plugin is a basic TextMate bundle which can be installed directly in WebStorm and provides syntax highlighting.
Download the plugin release here.
Unzip the archive.
Follow the instructions here.
Please vote for official support from JetBrains on this ticket in YouTrack.