No-Library (pure JS), HTML, CSS, JavaScript
Mootools 1.4.5, HTML, CSS, JavaScript
FabricJS 1.4.0, HTML, CSS, JavaScript
jQuery Compat (edge), HTML, CSS, JavaScript
Hard coded size and colour. Just learning....
Stackoverflow answer: http://stackoverflow.com/questions/25443347/show-bootstrap-select-inside-bootstrap-button-dropdown/25475203#25475203