Menu: Ability to prevent generation of dividers from items

[Felix Nagel]

In Selectmenu we need a way to show empty options. Currently the empty items (li elememts rendered by Selectmenu widget) will be processed as dividers. Any ideas how to solve this?

Please see Selectmenu visual test for a demo.

[Jörn Zaefferer]

Can this be addressed using the new items option in Menu? See ​https://github.com/jquery/jquery-ui/blob/bc8e75059c7a222ede8f5fddd88098581e5ee3ce/ui/jquery.ui.menu.js#L26

[Felix Nagel]

I played a little with this and it's possible to display an empty option by adding a special "empty" class and exclude this by using options.items. It's similar to adding "ui-menu-item" class to empty options: the empty items will be displayed but not processed (no generated id, ...).

These are the relevant lines: ​https://github.com/jquery/jquery-ui/blob/bc8e75059c7a222ede8f5fddd88098581e5ee3ce/ui/jquery.ui.menu.js#L307-L316

[Scott González]

Let's move ​https://github.com/jquery/jquery-ui/blob/bc8e75059c7a222ede8f5fddd88098581e5ee3ce/ui/jquery.ui.menu.js#L313 into a method named _isDivider() so that it can be overridden.

We'll also need to document this as an extension point for 1.11.

[Felix Nagel]

Menu: Add _isDivider method

Ability to prevent generation of dividers from items

Fixes #9701

Changeset: a6806ab17a9a5b332dc7d0c947a0a7a512dc2579

[Felix Nagel]

Selectmenu: Fix empty option processing

Ref #9701

Changeset: 3dfa08f22753074ce8d873b68cdc1341161f70be

[Scott González]

Documented in ​https://github.com/jquery/api.jqueryui.com/commit/5037e0d8e12780aa484f3d787ed997c18d02fca4.