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Populate dropdown values based on a previous dropdown?

  • We are building a form that uses two dropdown selectors. I am using the “load_field” hook to populate the first dropdown’s options of only top level custom taxonomy terms. We would like the subsequent dropdown’s options to be similar but be based on the selection of the previous dropdown. So if a user selects a parent term in Option 1, we would like to populate all of the child terms of that selection in Option 2. Is this possible?

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