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You’re showing CSS custom properties likely used by a library or component for controlling an animation. Brief breakdown:

  • -sd-animation: sd-fadeIn;

    • Selects the animation preset (here, “sd-fadeIn” presumably a fade-in keyframes preset defined elsewhere).
  • –sd-duration: 0ms;

    • Duration of the animation. 0ms means no visible animation; the element will jump instantly to its end state.
  • –sd-easing: ease-in;

    • Timing function controlling acceleration. “ease-in” starts slow and speeds up.

Notes and quick tips:

  • If you want a visible fade, set –sd-duration to a positive value (e.g., 200ms or 300ms).
  • Ensure the sd-fadeIn keyframes or CSS that reads these custom properties exists and applies them (e.g., using var(–sd-duration) in animation or transition properties).
  • Example usage pattern (conceptual):
    .element {animation-name: var(–sd-animation);  animation-duration: var(–sd-duration);  animation-timing-function: var(–sd-easing);}@keyframes sd-fadeIn { from { opacity: 0 } to { opacity: 1 } }

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