Wijmo UI for the Web
isDateNull Method
wijmo.input Namespace > wijinputdate type : isDateNull Method
Determines whether the date is a null value.
Syntax
$(function () {
    var returnsValue; // Type:  bool
    returnsValue = $(".selector").wijinputdate("isDateNull");
});
function isDateNull() : bool;
See Also

Reference

wijinputdate type
wijinputdate jQuery Widget