Add event `valueChanged` for any interaction

[Lonli-Lokli]

Clear and concise description of the problem

It would be great to have the possibility to subscribe to only one event and be able after that determine which options are currently selected

Suggested solution

onChange event handler, raised after any selection/deselection

Alternative

No response

Additional context

No response

Validations

• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[ghiscoding]

There's already the onClick event, so I see no reason to add yet another event that would do basically the same thing.
https://ghiscoding.github.io/multiple-select-vanilla/#/events

Then to get the selected items, just call getSelectsCode()
https://ghiscoding.github.io/multiple-select-vanilla/#/methods03

[Lonli-Lokli]

It is firing only when you click single item, it's not firing when you select/unselect all or group

[ghiscoding]

it fired onOptgroupClick event for a group and onCheckAll/onUncheckAll events, it's just a different event name. I would rather not add anything since everything is already accessible but via more than 1 event.

[Lonli-Lokli]

Yes, but usually developer is interested in single event on change, whatever was the reason - manual input, select all, group or single item click.
If I need to change data based on this - now I have to subscribe to all of them

[ghiscoding]

@Lonli-Lokli I got an open PR to add an onChange, hopefully this is good enough, I don't intend to extending more than what is in the current PR. See PR #374 for all the details