Ultimate

These look like CSS custom properties controlling a UI animation. Short explanation:

–sd-animation: sd-fadeIn;
- Purpose: names the animation to apply (here, a “fade in”). The element’s stylesheet likely uses this custom property to select an @keyframes rule or apply a class-based animation.
–sd-duration: 0ms;
- Purpose: sets the animation duration. 0ms means the animation runs instantly (no visible transition). Change to e.g. 300ms or 500ms to see the fade effect.
–sd-easing: ease-in;
- Purpose: defines the timing function (acceleration curve). “ease-in” starts slowly and speeds up; alternatives include linear, ease-out, ease-in-out, cubic-bezier(…).

Usage notes:

Ensure the property is consumed in CSS, for example:

animation-name: var(–sd-animation);animation-duration: var(–sd-duration);animation-timing-function: var(–sd-easing);

If duration is 0ms the animation won’t show; set a nonzero value.
You can override per-element or via JavaScript: element.style.setProperty(‘–sd-duration’,‘300ms’).
For accessibility, avoid forcing animations for users who prefer reduced motion by respecting prefers-reduced-motion.

If you want, I can: convert this into a complete CSS snippet, make a fade-in keyframes, or show how to toggle duration via JS.

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