php - Dependent dropdowns in Drupal -


I am trying to create a form in Drupal where a dropdown shows value on one another. In my case where I am making a form for some student program, I need to ensure that the options available for 'areas of interest' depend on 'department' which the user selects. Can someone recommend a way to do this? Anyway, I was using the 'webform' module for this form.

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