I would rather have browser provide rich components then rely on third party.
I'm looking at hundreds of date pickers, carousels, autocompletes, customizable selects, data tables, modals (e.g. for media previews). They've been around for as long as there have been browsers (so, thrity years or so).
Can you point at any standardisation effort around any of these commonly repeated patterns?
input type="date" and input type="color" are only now barely making it into the browser.