Code carried out when values are pushed into a field.
Vector fields, including the vector tag.
<log:vector onPush=<putError {new entry}>> writes a message each time something is pushed into log.A code field: holds code to be carried out each time the event happens. Add code after the tag is created with .push.
Carried out by .push, and when a new value is assigned to a vector (after it is cleared).