DHTMLX Docs & Samples Explorer

onBeforeChange Event

Event occurs before data in some input changed ( by user actions )
Event works for constructed input elements only

Parameters for inputs

  • item id
  • existing value
  • new value
  myform.attachEvent("onBeforeChange", function (id, old_value, new_value){
       //any custom logic here
       return true;
  });

Returning false from event handler will block value changing.