See https://html.spec.whatwg.org/multipage/forms.html#month-state-(type=month) https://html.spec.whatwg.org/multipage/forms.html#week-state-(type=week) We don't seem to implement the sanitization algorithm properly according to /html/semantics/forms/the-input-element/number.html /html/semantics/forms/the-input-element/week.html
<rdar://problem/22589724>
Is this just Bug 200416, where we don't support either (at least on macOS)?
I think it might be worth keeping this as a separate bug until we validate our existing (partial) implementation. Month/week inputs are currently off-by-default experimental features on macOS, there is some code in the tree for them.