Those look like CSS custom properties used by a design system (likely for “soft-design” or a component library) to control an animation named “sd-fadeIn.” Briefly:
- -sd-animation: sd-fadeIn;
- Selects the animation to apply (named keyframes or a predefined animation in the system).
- –sd-duration: 250ms;
- Controls the length of the animation (250 milliseconds).
- –sd-easing: ease-in;
- Sets the timing function, making the animation start slowly and speed up.
How they’re used (example pattern):
- A component or utility reads these custom properties and applies them to the element’s animation or transitions.
- There’s usually a @keyframes block named sd-fadeIn defining opacity/transform changes (e.g., from { opacity:0; transform: translateY(8px); } to { opacity:1; transform: translateY(0); }).
- The properties let you override defaults per-element without changing the underlying CSS rules.
Example usage (CSS):
css
.element {animation-name: var(–sd-animation, sd-fadeIn); animation-duration: var(–sd-duration, 300ms); animation-timing-function: var(–sd-easing, ease); animation-fill-mode: both;}Adjustments:
- Make it slower: –sd-duration: 500ms;
- p]:inline” data-streamdown=“list-item”>Disable: set –sd-duration: 0ms or remove the animation variable.
If you want, I can write the sd-fadeIn keyframes or adapt this for a specific framework (React, Tailwind, etc.).
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