Massage will time out after 3/5 seconds

 

Function and Global Variable Declaration :-

let myitmval = apex.item( "P21_BILL_NO" ).getValue(); // your own item value get second

apex.jQuery(function() {

  apex.theme42.util.configAPEXMsgs({

    autoDismiss: true,

    duration: 3000*myitmval  // duration is optional (Default is 3000 milliseconds)

  });
});