Read only field , get latest value from read only field in in power app portal

Below line is used to make field readonly in power app portal through js

$("#bdo_relationshiprole_name").parent().css("pointer-events","none"); 

Below line is used to set deault value in lookup field

$("#bdo_relationshiprole_name").attr("value",rolename);

$("#bdo_relationshiprole").attr("value",roleid);

$("#bdo_relationshiprole_entityname").attr("value","bdo_relationshiprole");

Below line is used to to used to get readonly value from field otherwise on form submit the read only values not getting

$("#bdo_relationshiprole").trigger('change');