What's the right way to reference data in a control that is only conditionally available and not trigger property errors?

App Building
1

I have situations where I have dynamic UI that shows up once data is available due to other actions on a page.

E.g. 2 forms -- one to submit some data, then when that's done, a button shows to do something with that data.

In this case, the data isn't available, and I see property errors while editing the app:

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What's the right way to reference {{ last_question.data.id }} in this case?

2

This happens most often for me when you reference table1.newRow, table1.SelectedRow when they are "empty" or a passed value to a query . No harm in this. You only see these alarming red warnings in Edit mode, not in Preview mode.

You will see the property go green once your data is there.

3

This is true that there isn't much harm in this- the errors won't be shown in the user view of the app

If you'd like though, you can use the optional chaining operator here like {{last_question.data?.id }}

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