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The **`CSSStartingStyleRule`** interface of the [CSS Object Model](/en-US/docs/Web/API/CSS_Object_Model) represents a CSS {{CSSxRef("@starting-style")}} at-rule.
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## Instance properties
_This interface inherits properties from its parent, {{domxref("CSSGroupingRule")}}._
## Instance methods
_This interface inherits methods from its parent, {{domxref("CSSGroupingRule")}}._