Implementing an HTML datetime input control in 2012

Before the advent of the wonderful HTML5 date control it was necessary to implement a lot of custom javascript to do something similar.
The cbframe datetime control was built in 2011-2012 before the introduction of the "class" keyword to the language and before any Javascript Frameworks like JQuery, Angular, React etc.
It still works and for some situations, is still better....

Feature Requests implemented in the cbframe control which are not in the W3C Spec or not yet supported

• Input format for better international usage, independent of browser language: 1432575
• It would be great to have a datetime input as one control (as above) with cross browser support.
• It would be great to prevent bad entry at the point of entry rather than on form validation.

Bug reports submitted to the Mozilla developers as the date input was first implemented in Firefox

• Bug: input date time does not respect CSS rules for font-family: 1420824
• Time input, Date input undo not available: 1431463
• Input type date content not in locale format: 872630