Code for interactive forms

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The first thing you’ll do is to have both of your dropdown menus *onChange event.*

// your event 

let pencils = [    {"label": "pencil1", "value": "pencil1"},                                            {"label": "pencil2", "value": "pencil2"}]

let erasers = [         {"label": "pencil1", "value": "pencil1"},         {"label": "pencil2", "value": "pencil2"}]

if ($w("#dropdown1").value === 'pencils') {$w("#dropdown1").options = pencils}
if ($w("#dropdown1").value === 'erasers') {$w("#dropdown1").options = erasers}