jGleitzmarkdown-it-kbd 
markdown-it plugin for keystrokes
Renders [[x]] as <kbd>x</kbd>. (<kbd> is the tag for keystrokes).
Usage
const md = require('markdown-it')();
const kbd = require('markdown-it-kbd');
md.use(kbd);
This plugin can also be used together with markdown-it-attrs.
Syntax notes
The end tag ]] must be on the same line as the start tag [[.
The characters “[” and “]” are not allowed within keystroke tags.
If you need to use them, escape them with a backslash (i.e. \[ or \]) or use HTML escape sequences ([ for [ or ] for ]).