@starting-styleThe @starting-style CSS at-rule sets the starting values for properties that are transitioning when the target element's style is first updated.cssCSSnewly2024-08-06https://drafts.csswg.org/css-transitions-2/#defining-before-change-stylehttps://developer.mozilla.org/docs/Web/API/CSSStartingStyleRuleapi.CSSStartingStyleRulecss.at-rules.starting-stylehttps://nowyoucanuse.com/features--starting-style.html