These look like CSS custom properties (variables) used to control a small animation system. Explanation of each:
- –sd-animation: sd-fadeIn;
- Specifies the animation name or preset to apply. Here “sd-fadeIn” likely denotes a fade-in animation defined elsewhere (keyframes or a preset handler).
- –sd-duration: 0ms;
- Duration of the animation. 0ms means it runs instantly (no visible animation). Use values like 200ms, 500ms, or 1s for visible transitions.
- –sd-easing: ease-in;
- Timing function controlling acceleration. “ease-in” makes the animation start slowly and speed up. Other options: linear, ease-out, ease-in-out, cubic-bezier(…).
How they are typically used:
- Defined on an element and consumed by CSS rules or JavaScript that maps the custom properties to actual animation properties (animation-name, animation-duration, animation-timing-function) or to a framework’s animation engine.
Example CSS pattern:
:root {–sd-animation: sd-fadeIn; –sd-duration: 300ms; –sd-easing: ease-in-out;}
.element { animation-name: var(–sd-animation); animation-duration: var(–sd-duration); animation-timing-function: var(–sd-easing); animation-fill-mode: both;}@keyframes sd-fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); }}Practical notes:
- With –sd-duration: 0ms the element will jump to the final state immediately; set a nonzero duration to see the effect.
- Ensure the keyframes or animation definition named by –sd-animation exists.
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