Описание тега tern
Tern is a JavaScript code analyzer that is intended to improve the support a text editor has for JavaScript coding. Use this tag for questions about its function or how to add tern to the editor of your choice.
Tern is a JavaScript code analyzer which may be installed as a plugin to various text editors such as emacs and vim and sublime-text. It is designed to allow for added functions such as code completion and automatic refactoring when editing JavaScript.
More information is available at http://ternjs.net, and its source is available from https://github.com/marijnh/tern.