Auto update blank value in form by using other field value and default value

Design help General
2

Hi @Adhi_Wiratama,

You need custom code for that. Here’s roughly how it’ll look like:

// Get the values for both input
var wanumber = document.getElementById('WA-Number').value;
var email = document.getElementById('Email ').value;

$('.submit').on('click', function(){

// Create the placeholder email
var placeholder = wanumber + '@noemail.com'

// Check if email is present, if not set email to be placeholder
  if (!email) {
     email = placeholder
  }
});

If this doesnt work, you may need to look into using custom submit function from here: Customizing Form Submit Action