> It doesn't trigger built-in mobile operating system components.
I worry about this. The built-in mobile operating system components are reliable, accessible, and responsive. I really like it when an input element opens the Android UI because I know how it works and that it is reliable. This applies to <select>, but also date/time inputs for example.
Chrome already uses plenty of non-native components. Firefox is similar. Moreover while I can understand the concern about poorly implemented components from random web developers, Google is probably the best positioned to implement a widget that faithfully replicates the native equivalent, at least on Android.
> Chrome already uses plenty of non-native components. Firefox is similar.
This is then won't be consistent with native OS apps, but still be consistent across websites. Better than everybody doing different div+JavaScript magic which behaves slightly different across different websites.
you're misunderstanding, this will leave the appearance of the select on mobile up to the web developer