Setting a filed value to virtual field value using JavaScrip

[MarkMayhrai]

Requesting support please, just need to know how to set a field's value in a submission field to a value when a virtual field's value changes, please

[CoopperBackpack]

Hello @MarkMayhrai,

If I got the inquiry correctly, you have a Virtual field and some data source field on the Submission form. 

When the value in the Virtual field was changed, the value in the source field should be changed too. 

If the data source field is set to the usual input field, please test this code. 

Paste it to the DataPage Footer section. Do not forget to disable the HTML editor on the Advanced tab before pasting the code.

Also, please double-check the field names and replace them if needed. 

<script>
document.addEventListener('DataPageReady', function (event) {
  
document.querySelector('input[id*="cbParamVirtual1"]').addEventListener("change", myFunction); 
   
      function myFunction(event) {
   
          let virtualField = event.target.value;
          document.querySelector('#InsertRecordField_name').value= virtualField; //replace Field_name with your local field name
     
          document.removeEventListener('DataPageReady', myFunction);
     }        
});
</script>