Using IonDen's free ion.rangeSlider, on GitHub and available by CDN.

• Works using a standard Webflow Text Input field.
• Allows min / max values
• Allows a default initial value
• Allows stepping ( defaults to 1.0 )
• Allows range input, i.e. a top and bottom value for e.g. search filtering.
• Many styling options and skins
• Can not see in the designer

Here I've configured it for a typical 1 to 5 star rating, with 0.5 half-rating steps.