Inserting values in form display type


I’ve been having a problem displaying values with the form plugin.

If I send an e-mail, I can include {{ }} and it will automatically include the given e-mail in the emailfield. Now I would like to do the same in a type: display field e.g

type: display
content: '{{ form.value.field1 + form.value.field2}}'

Is there a way to implement this? Now it just shows as text ({{ form.value.field1 + form.value.field2}}) instead of the actual values (e.g 5 when the values of field1 and 2 are 4 and 1).