CSSKeyframesRulecssRules

The CSSKeyframesRule interface represents a single @keyframes rule within a CSS style sheet. It is part of the CSS Object Model (CSSOM) and allows developers to programmatically inspect and manipulate CSS animations. A CSSKeyframesRule object corresponds to the entire block of keyframe animations, typically defined using the @keyframes at-rule in CSS. For example, a rule like "@keyframes myAnimation { from { opacity: 0; } to { opacity: 1; } }" would be represented by a CSSKeyframesRule.

This interface provides access to the name of the animation (e.g., "myAnimation") and a collection of CSSKeyframeRule objects, each representing a specific keyframe within the animation sequence (e.g., "from" or "to" selectors and their associated styles). The CSSKeyframesRule interface inherits from CSSRule. While it can be used to create and modify animations dynamically, its primary use is often for reading and understanding the structure of existing keyframe animations defined in a stylesheet. It is a fundamental component for advanced CSS animation manipulation in JavaScript.