A simple implementation of how to simulate a Dynamic List which the user can manually increase or decrease using a single Container, a List component and States.

This image uploading animation simulates dragging and dropping a file into a predefined area using Variables. *Credits to Jokūbas as this is a replicate of his animation https://dribbble.com/shots/1413804-Image-Uploading-Animation

Use a variable to add the costs of premium features that are selected or deselected using an iOS switch component. See a video of how to do this step-by-step in this webinar: https://support.proto.io/hc/en-us/articles/115001585411-Model-advanced-prototypes-that-use-variables-part-II TAGS: variables variable math addition switch switches fire an items event