Read a hosted input's current value on the client, the port's version of
a conditionalPanel reading input.x. Starts from the value Shiny last sent,
then follows shiny:inputchanged, a jQuery event on document with
{name, value} on the event object, so this listens through
window.$(document), not addEventListener. Undefined until Shiny has the
input at all.
Read a hosted input's current value on the client, the port's version of a conditionalPanel reading input.x. Starts from the value Shiny last sent, then follows shiny:inputchanged, a jQuery event on document with {name, value} on the event object, so this listens through window.$(document), not addEventListener. Undefined until Shiny has the input at all.