fix: add null type to allowable target onchange #2190
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Preface: I don't know javascript.
For typed fields from the UI, when you entered a value then removed it, it would act as an empty string rather than reset to
null
. For many fields, this is an invalid type, causing errors on build.This PR adds the
null
type to the allowedonchange
events, which is interpreted as the correctNone
in python backend. Note this does mean that an empty string is no longer accepted as a valid input, but that seems okay. If this is the correct fix, I'll replicate on the other typed fields.