There is a counter badge(I don't know what should I call it) when I modify or add something in the backend menus. And I want to use it for my own plugin menus or implement it to frontend. But I couldn't figure out how to do. I checked the documents here but couldn't find anything helpful. Could someone help me to use it or give me any hints?

ljwjulian37073 said: There is a counter badge(I don't know what should I call it) when I modify or add something in the backend menus. And I want to use it for my own plugin menus or implement it to frontend.

Here you go: https://octobercms.com/forum/post/sidemenu-counter

Advanced support added in build 448, but you'll probably need to check commits for documentation: https://github.com/octoberrain/meta/blob/master/release-notes/build-448.md