Dynamically populate webform fields based on other input fields

Pavan_163162

We should be able to populate a particular field dynamically based on the input updated in another field.

For example: If there are two fields "FirstName" and "LastName", the field "Full Name" should be allowed to configure in such a way that it displays FirstName+LastName. This should be displayed when the input of the First and Last name changes as a read only field.

This would be helpful in showing the calculations such as aging, discount rate, number of days between two dates/weeks/years. All these calculations are possible currently using actions and not dynamically in webform.