v9 Splitbutton documentation is missing important information

[jurokapsiar]

v9 Splitbutton documentation is missing important information:

• how to attach click handler to the primary button
• that secondary button needs to be labelled

[msft-fluent-ui-bot]

Because this issue has not had activity for over 180 days, we're automatically closing it for house-keeping purposes.

Still require assistance? Please, create a new issue with up-to date details.

[msft-fluent-ui-bot]

Because this issue has not had activity for over 180 days, we're automatically closing it for house-keeping purposes.

Still require assistance? Please, create a new issue with up-to date details.