Welcome to Webflow and the Forum!
Here’s a potential workaround for you…no custom code…just Webflow Interactions 2.0
I haven’t made this part of the slider, just a div sitting right below it.
- I’ve set the slides to autoplay transitioning each 4 seconds and loop
- Created a green progress bar div
- Then set a page load interaction on the progress bar 0vw initial state, 100vw easing over 4 seconds
- Also set that interaction to loop
After around 8 loops you might see some tiny time difference between the two - depends how many loops you will need ultimately - i’m testing it out further to try and keep it continuously matched.
View in Preview mode
Feel free to copy the settings, or I can make it cloneable if you are short of time!