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Multiple app in different tabs


I have created a dashboard using dropdown we can choose the name of the file and then another options. The idea is every users can choose the appropriated file and then 3 different options like above:

But I would like to have 3 different apps like that. I used this solution :https://dash.plot.ly/urls but know I can’t update my dropdown when I choose a file (ops for example) I can’t find any fields in the second dropdown and when I use just one app that’s work.

Thanks for help :slight_smile:

any help on this, need examples on something similar to it