method
Value.IsZero
Report whether the value is the zero Value, which holds no data.
Example
if values["title"].IsZero() {
// The map has no title entry.
}Returns
true for the zero Value.
boolHow it works
A missing map entry and store.Value{} are zero. Null is not zero: it is an explicit value.
Full signature
Related types
ValueAn immutable scalar, object, list, or populated document value.