[3.0 + IE10/Safari] HTML5 date picker fields do not work

[robbieaverill]

Starter 3.0.x-dev with IE10

IE10 does not support HTML5 date picker components, which we've started to use in the frontend for filtering CWP events.

It renders as a text field.

We may need to add a jQuery datepicker shim or something for IE10 only.

Can be reproduced with the CWP demo site content on /en_NZ/event-holder and use the "Filter by date" form.

[Cheddam]

Safari on macOS still doesn't support HTML5 date fields either, so the shim would need to cover that browser too.

[brynwhyman]

^ Yeah, let's add Safari to the title.

see https://caniuse.com/#feat=input-datetime

[brynwhyman]

What's the reasoning for an impact/high rating here? I'm not sure this is affecting a major usage flow if the text input can suffice a date filter.

I'm dropping to impact/medium, but open to suggestions on altering this.