These are CSS custom properties (variables) used to control an element’s animation. Breakdown:
- -sd-animation: sd-fadeIn;
- What it holds: the name of the animation to apply (likely a predefined animation called “sd-fadeIn”).
- Usage: referenced by the animation or a script to pick which animation runs.
- –sd-duration: 0ms;
- What it holds: animation duration. Here it’s set to 0 milliseconds, which effectively disables visible motion (instant change).
- Typical values: “200ms”, “500ms”, “1s”, etc.
- –sd-easing: ease-in;
- What it holds: timing function (easing) controlling animation acceleration. “ease-in” starts slow and speeds up.
- Other options: linear, ease-out, ease-in-out, cubic-bezier(…).
Example usage in CSS:
css
.element {animation-name: var(-sd-animation); animation-duration: var(–sd-duration); animation-timing-function: var(–sd-easing);}Notes:
- The first property name starts with a single hyphen (-sd-animation) which is not a standard custom property (custom properties must start with –). If it’s intended as a CSS variable, it should be –sd-animation. Otherwise it may be a regular property name used by a framework or script.
- With duration 0ms, animation won’t be visible even if easing is set.
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