Webform 8.x-5.x - Computed Elements

This screencast walks through how to create a Webform computed element.

[frederickjohnh]

One other note, you need to be running Drupal 8.3.x or greater for this to work. The create_attribute() function that is use in the Twig in the Example: Elements Computed webform was added to the 8.3.x version. Otherwise you will get an error and the computation will not work.

[DroneMasterFilmariAeriene]

I can't find an example for my case scenario: ie. I have a form that should calculate a sum of multiple options filled or checked in the form. The fields that need to be calculated should have a separate record with its specific price, visible or not. Let's say there is a starting price and each extra option has its own price. Those that are checked (radio or select) should be SUM calculated to the base price. I see it like adding a secret/hidden value to the options I need. Is it possible with this module? Thanks!

[frederickjohnh]

For anyone else that previously have Webform Examples enabled and cannot find the "Example: Elements Computed" shown in the video, I had to uninstall the "Webform Examples" and then enable it. After clearing the registry it was listed with the other example webforms.

[mindw]

Webforms is a GREAT Drupal module and you, Jacob Rockowitz are a great developer. Thanks for your work!

Your videos could be much more helpful for me if I could understand more. My English is not so bad. Please try to speak a bit slower and well emphasized. Thank You!

[engtushar]

Thnx for the video. I can do normal math calculation in computed field. For example sum, add, subtract etc.
But I want to do more advance like sqrt or square. How can I do that ?

[seppeclijsters]

Thanks for the tutorial. Is it also possible to make a calculate, like the module webform calculator in drupal 7?

[frederickjohnh]

This is great! Going to see if I can use Webform computed elements to make custom Paypal donation buttons using the information submitted in the webform.

[babatundeoladada]

This is great. please help me with Twig code to sum a repeated field on a custom composite element.