better way to do this? ('already declared in upper scope')

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  1. in the 2nd on change use event1 instead of event (if you don’t like the yellow mark, which is by the way a warning, not an error. It 's saying: be aware, you’re overriding the event ). In your case since you don’t use the event you can replace it by ()

  2. You can try:

$w("#dropdown1, #dorpdown2").disable();