One of the rationales behind Jangaroo is to make the good parts of static typing, such as getting reliable and useful IDE support, available for the dynamic language JavaScript. This is described in more detail in the Jangaroo tools wiki.

Recent versions of the IDE IntelliJ IDEA Ultimate Edition have built-in support for ActionScript and JavaScript development. Jangaroo provides an IDEA plugin called Jangaroo 4 (https://github.com/CoreMedia/jangaroo-idea/wiki/Developing-Jangaroo-4-Ext-AS-6-Applications-with-IntelliJ-IDEA#building-with-ideas-incremental-build-process). The older Jangaroo 0.9 plugin should not be activated jointly with the current Jangaroo 4 version.

Figure 6.2. Studio project within the Project workspace in IntelliJ Idea