The @starting-style CSS at-rule defines the starting values for properties that are transitioning when the target element's style is first updated.

Compatibility

• Chrome 117 Released on 2023-09-12
• Chrome Android 117 Released on 2023-09-12
• Edge 117 Released on 2023-09-15
• Firefox ❌ Search for bugs Search for standards position
• Firefox for Android ❌ Search for bugs Search for standards position
• Safari 17.5 Released on 2024-05-13
• Safari on iOS 17.5 Released on 2024-05-13

BCD data

• api.CSSStartingStyleRule
• css.at-rules.starting-style