`nav_spacer()` should support a `value` parameter for it to be compatible with `nav_insert()`/`nav_remove()`

[DeepanshKhurana]

I have a navset_tab() that I programmatically want to generate and regenerate based on server logic. While I am able to set the nav_panel()s perfectly using nav_insert(), I am having trouble with the following layout.

• Main
• Menu1
• Menu2
• Spacer
• Menu3
• Menu4

Now, that Spacer in between gets rendered perfectly on the first go. But then, when I need to regenerate the menu, I cannot remove it using nav_remove() since that needs a value to be passed in the target.

Setting a value on the nav_spacer() gives me an unused argument warning.

I have also tried something as follows, with different variations:

nav_spacer() |>
    tagAppendAttributes(value = "spacer")

nav_spacer() |>
    tagAppendAttributes(`data-value` = "spacer")

nav_spacer() |>
    tagAppendAttributes(`data-value` = "spacer", class = "nav-link")

It would be nice to give the spacer a value and have it behave like the other nav_panel()s to structure more creative menus (some options on the left, others on the right) and then programmatically change them as the user wants and interacts with the app.

From what I can see, the only thing that limits it is the behaviour. Instead of being a proper li item, it is a div, and it does not have a data-value.

This would be useful to have.

[DeepanshKhurana]

Meanwhile, for someone looking for an alternative to work with, the following CSS will work.

li.nav-item:nth-last-child(N) {
  margin-left: auto;
}

where N is position from the side where you need to split the tabs from.

• Main
• Menu1
• Menu2
• Spacer
• Menu3 (N = 2)
• Menu4