These look like custom CSS properties (CSS variables) used to control a scoped animation system. Breakdown:
- -sd-animation: sd-fadeIn;
- Specifies the animation name or preset to use (here a preset called “sd-fadeIn”).
- –sd-duration: 250ms;
- Duration of the animation (250 milliseconds).
- –sd-easing: ease-in;
- Timing function controlling acceleration (ease-in starts slowly and speeds up).
How they work together:
- A stylesheet or component script reads these variables and applies them to an element’s animation, for example by mapping the animation preset to keyframes and using the duration and easing when setting animation or transition properties.
- Example usage pattern in CSS:
.element {animation-name: var(–sd-animation); animation-duration: var(–sd-duration); animation-timing-function: var(–sd-easing);}
Implementation notes:
- The variable names mix a single-dash (-sd-animation) and double-dash (–sd-duration). Only double-dash names are valid CSS custom properties; a single-dash name is invalid unless handled by JavaScript.
- If -sd-animation is intended as a custom property, rename to –sd-animation or set it via JS: element.style.setProperty(‘-sd-animation’,‘sd-fadeIn’) and read it from JS.
- Ensure the animation keyframes exist (e.g., @keyframes sd-fadeIn { from { opacity:0 } to { opacity:1 } }).
- Consider fallbacks: animation-duration: var(–sd-duration, 300ms);
If you want, I can:
- Provide correct CSS examples for the sd-fadeIn keyframes and usage.
- Show a JavaScript snippet that reads these variables and triggers animations.
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