If you need to get the Y position of a vertically scrolling container, create a text box. Then on the container scroll trigger, set a variable that evaluates the numerical callback value from the event (Y position). Then add a callback that changes the text property of the text box by reading from the variable.

An example of a sticky scrolling sidebar (website)

for Rest MeryJane

Hey guys! I'm back with an amazing prototype for you guys. This has been my longest and quite a challenging redesign project for IMDb whose prototype is pretty awesome and contains lots of stuff like Nested Containers, a bit of animation, some really beautiful visual elements and interactivity for you to explore! I had so much fun making it with Proto.io and I truly hope you guys love it and would love to know your views and suggestions on how can I improve it :) Cheers! Aman

Project using Variables to simulate Drag and Drop to Snap functionality into a predefined area. While also adding Animations and States for a more smooth and elegant process.

Basketball game project using Variables to determine if ball lands or misses the hoop. Tracks your score, shots landed, shots missed and shot percentage. You can also select your ball from the settings.

Using variables and conditional interactions to create a way to track how long you have hovered over a component and execute a sound once 5 seconds of hovering has been completed.