# Multiple dropdown synchronisation

**URL:** <https://discourse.elm-lang.org/t/multiple-dropdown-synchronisation/6405>\
**Category:** Learn\
**Created:** [October 16, 2020, 12:31am UTC](https://discourse.elm-lang.org/t/multiple-dropdown-synchronisation/6405 "2020-10-16T00:31:32Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![lydell](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.elm-lang.org/lydell/32/178_2.png) [@lydell](https://discourse.elm-lang.org/u/lydell)\
**Post date:** [October 16, 2020, 7:22am UTC](https://discourse.elm-lang.org/t/multiple-dropdown-synchronisation/6405/12 "2020-10-16T07:22:48Z")

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Sorry, I have no code to share. But when you change the main category you’re free to update your model any way you want that makes sense – like changing the sub category to something. Since your view is just a projection of your model it will automatically show the right thing.

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_[View the full topic](https://discourse.elm-lang.org/t/multiple-dropdown-synchronisation/6405)._