Use Twig to create interactive webform calculations

We recently spoke with Ryan Jones from TAPS goClub group about a fascinating project to show commuters just how much pollution they are individually contributing to the environment. In addition to the eye-opening data it provides, the webform created by Ryan and his colleague Ramon Zavala also provides a perfect example of how you can incorporate calculations into your forms and share them with your users.

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webform_submission:values] includes all elements of the webform instead of the ones selected in email body [#3304846]

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