These look like custom CSS properties (CSS variables) used to control an animation system prefixed with “sd-”. Explanation:
- -sd-animation: sd-fadeIn;
- Selects the named animation to run. Here “sd-fadeIn” is likely a keyframe animation that fades an element in (opacity from 0 to 1 and possibly transforms).
- –sd-duration: 0ms;
- Defines the animation duration. “0ms” means the animation runs instantly (no visible transition). Use a nonzero value (e.g., 300ms, 500ms) to see the effect.
- –sd-easing: ease-in;
- Sets the timing function (animation-timing-function). “ease-in” makes the animation start slowly and speed up.
How they might be used in CSS:
- These are custom properties, so the library or your stylesheet must read them and apply to actual animation properties. For example:
.element {/* custom vars / –sd-animation: sd-fadeIn; –sd-duration: 300ms; –sd-easing: ease-in;
/ applied to real properties (example) */ animation-name: var(–sd-animation); animation-duration: var(–sd-duration); animation-timing-function: var(–sd-easing); animation-fill-mode: both;}Notes:
- If duration stays at 0ms, set a positive duration to make the fade visible.
- Ensure the keyframes for sd-fadeIn are defined, e.g.:
@keyframes sd-fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); }}
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