amber-website/bower_components/mousetrap/plugins/global-bind/README.md

Global Bind

This extension allows you to specify keyboard events that will work anywhere including inside textarea/input fields.

Usage looks like:

Mousetrap.bindGlobal('ctrl+s', function() {
    _save();
});

This means that a keyboard event bound using Mousetrap.bind will only work outside of form input fields, but using Moustrap.bindGlobal will work in both places.

If you wanted to create keyboard shortcuts that only work when you are inside a specific textarea you can do that too by creating your own extension.