Supported disabled items

[ebidel]

Using core-menu, I found myself wanting to prevent certain children from being selectable.

<core-menu>
  <paper-item label="Inbox" icon="inbox"></paper-item>
  <paper-item label="Social" icon="account-child"></paper-item>
  <paper-item class="separator" disabled></paper-item >
  <paper-item label="Sent" icon="send"></paper-item>
</core-menu>

In this case , excludedLocalNames won't work. It would be nice to support the disabled attribute (or something similar) in core-selector. Or maybe a better place is for core-menu to handle it?

[frankiefu]

There is an issue filed on core-menu here: googlearchive/core-menu#8

[ssorallen]

A paper-item maybe shouldn't be used for a separator because it's not a member of the selectable items in the menu (regardless of being active or disabled).

A disable-able item would be nice though:

• core-item needs to expose a disabled attribute.
• core-item needs basic styling for :host([disabled]), maybe 40% opacity, no pointer events, cursor "not-allowed"
• A disabled core-item should maybe prevent the default action on an anchor within it? (This feels magical.)
• core-selector needs to prevent user- and programmatic selection of disabled items within it

[RobertLowe]

It would be nice if core-selector supported disabled, this would also allow paper-tab's to be disable-able for another example.

I'm sure there are a plethora of use cases for this