Tern & Chai support - angelozerr/tern.java GitHub Wiki

tern.js provides the chai Tern JSON Type Definition which gives a support for Chai Assertion Library.

After installing and converting your project as Tern Project, go at Tern project property, click on Tern / Modules item and select the Chai tern plugin :

Check Chai Def

After that you can benefit with Chai completion :

Chai Completion