selectInput with value = NULL doesn't work. This is a bug from 0.10.1, as I've just updated. This is very sad, as some JS charts have default value = null.
Unfortunately, I don't think it's possible to get this to do what you want. All of the input items are converted to strings in the HTML, like so:
<optionvalue="Item_1">Item 1</option>
And there's no straightforward way to set value to a null value. I think the way to go is to set it to a string value and use a reactive to convert that value into whatever you want. For example:
selectInput with value = NULL doesn't work. This is a bug from 0.10.1, as I've just updated. This is very sad, as some JS charts have default value = null.
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