Question: Is there a way to update a drop down only if the user clicks on it? (I didn’t see a n_clicks property for the drop down like the html components have).
Example: Say you have a “city” drop down and a “zipcode” drop down (among several other drop downs) whose options are based on a large healthcare database, and both are multi-select and optional for the user. You’d like the zipcode drop down to be based on the selected values in city if needed.
Challenge: Now you could update the zipcode options every time the city selected values change. But is there a way to only update the zipcode options when/if it’s needed (such as when the user selects it) else leave the zipcode options blank and eliminate unnecessary querying of the database (and possibly wait time in the app)… Any ideas?
Thanks!
D.