input type="date" example not working in IE

[chrisdavidmills]

Cross-filed from https://bugzilla.mozilla.org/show_bug.cgi?id=1516200

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/Input/date

When trying to run locally the last example (with javascript code) available in the page
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/Input/date
for testing date input type, it does not work, either with IE (date type not recognised) .

The JS fallback should work, but seems not to. It just shows the text input fallback, and not the select elements as it should do