These are custom CSS properties (CSS variables) likely used by a library or component for controlling an animation. Brief breakdown:
- -sd-animation: sd-fadeIn;
- Purpose: names the animation to run. Likely maps to a keyframe set called “sd-fadeIn” (a fade-in effect).
- Usage: component or stylesheet reads this variable to decide which animation to apply.
- –sd-duration: 0ms;
- Purpose: sets the animation duration. Here it’s 0 milliseconds, so the animation will be instantaneous (no visible transition).
- Typical values: “300ms”, “1s”, etc.
- –sd-easing: ease-in;
- Purpose: sets the timing function (animation easing). “ease-in” starts slowly then accelerates.
- Alternatives: linear, ease-out, cubic-bezier(…), steps(…).
How they work together
- A CSS rule or component likely uses these variables when declaring animation shorthand or properties, e.g.:
animation-name: var(–sd-animation);animation-duration: var(–sd-duration);animation-timing-function: var(–sd-easing); - With duration 0ms, easing and animation-name have no visible effect; the element will jump to the final state.
How to change behavior
- Enable visible fade: set –sd-duration: 300ms (or desired time).
- Change easing: –sd-easing: ease-out or cubic-bezier(0.4,0,0.2,1).
- Override animation: set –sd-animation: none to disable, or to another keyframe name.
Example (CSS):
.my-element {–sd-animation: sd-fadeIn; –sd-duration: 300ms; –sd-easing: ease-out; animation-name: var(–sd-animation); animation-duration: var(–sd-duration); animation-timing-function: var(–sd-easing); animation-fill-mode: both;}Note: Exact behavior depends on the surrounding library/component that defines the sd-* keyframes and reads these variables.*
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