Ravenous part 3 - Setting the Search Bar's State - step 9

Web Development Full-Stack
1

Can some one explain in more details why we need to bind handleSortByChange to this and to sortByOptionValue. Maybe by also explaining what would would happen if we don’t bind and what is the value of this in this context.

https://www.codecademy.com/paths/web-development/tracks/front-end-applications-with-react/modules/ravenous-part-three/projects/setting-searchbar-state

type or paste code here