Tern & Qooxdoo support - angelozerr/tern.java GitHub Wiki
tern-qooxdoo provides the qooxdoo tern plugin which gives you a support for Qooxdoo.
After installing and converting your project as Tern Project, go at Tern project property, click on Tern / Modules item and select the qooxdoo tern plugin and the version :

After that you can benefit with Qooxdoo completion :

Completion works for Qooxdoo method :

This Qooxdoo tern plugin can be used inside WebBrowser. You can see demo here.