ui-dropdown doesn't clear selection with msg.payload = [] about node-red-dashboard HOT 8 CLOSED

I can confirm that sending an empty array does not clear it, and neither does an empty string. However, if the node is changed to multi-select then an empty array does clear it.

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is this a bug or it is designed to work only with multi-selection?

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There is a bug, there should be a way of clearing single selection dropdowns. Whether, for single selection, it should be an empty string (which seems logical to me) or should still be an empty array I will leave to the developers. Perhaps both options should work in both cases.

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@colinl,
Last week I had created a pull request for dynamic control of radiobuttons, which can be cleared using an empty string. I will have a look to create a PR to do the same for drpodowns tonight.
Bart

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The docs currently say it should be an empty array. Whether it should also allow an empty string I don't know.

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Yes indeed. An empty array seems to make more sense to me compared to an empty string, because the dropdown can contain different kind of data types (i.e. not only strings):

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Pull request created.

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Closed by #775

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