tern-bootstrap provides the bootstrap tern plugin which gives you a support for Bootstrap.

After installing and converting your project as Tern Project, go at Tern project property, click on Tern / Modules item and select the Bootstrap tern plugin (ECMAScript, Browser and jQuery tern plugin must be selected too) :

Completion

After that you can benefit with Bootstrap completion :

Object literal completion for options is available too :

Web Browser

You can play with online demo which uses CodeMirror (inside Web Browser).