progress()The progress() CSS function returns a ratio for the relative position of one value between two other values, clamped between 0 and 1. You can use it to interpolate a value for other calculations.cssCSSnewly2026-09-01https://drafts.csswg.org/css-values-5/#progresshttps://developer.mozilla.org/docs/Web/CSS/Reference/Values/progresscss.types.progresshttps://nowyoucanuse.com/features--progress-function.html