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Understanding the CSS Snippet: ”-sd-animation: sd-fadeIn; –sd-duration: 0ms; –sd-easing: ease-in;”

The line -sd-animation: sd-fadeIn; –sd-duration: 0ms; –sd-easing: ease-in; looks like a set of CSS custom properties (variables) and a vendor-like property used to control an animation. Below is a concise explanation, practical uses, and an example showing how to convert these into standard CSS that browsers understand.

What each part means

  • -sd-animation: sd-fadeIn;
    • Likely a nonstandard or framework-specific property naming convention (the -sd- prefix suggests a scoped or library-specific variable). It indicates the animation name to apply, here sd-fadeIn.
  • –sd-duration: 0ms;
    • A CSS custom property defining the animation duration. 0ms means no visible animation (instant).
  • –sd-easing: ease-in;
    • A CSS custom property for the animation-timing-function (easing curve).

Practical interpretation

To make this usable in regular CSS, map the custom properties to standard animation properties and define the keyframes for sd-fadeIn. If you want a fade-in effect, set a nonzero duration (e.g., 300ms).

Example: standard CSS implementation

css
:root {–sd-duration: 300ms;    /* change from 0ms to a visible duration /  –sd-easing: ease-in;}
/ Define the keyframes for sd-fadeIn /@keyframes sd-fadeIn {  from { opacity: 0; transform: translateY(6px); }  to   { opacity: 1; transform: translateY(0); }}
/ Utility class that applies the animation */.sd-animate {  animation-name: sd-fadeIn;  animation-duration: var(–sd-duration);  animation-timing-function: var(–sd-easing);  animation-fill-mode: both;}

Usage

  • Add the .sd-animate class to elements you want to fade in.
  • Adjust –sd-duration and –sd-easing on a per-element basis for different timings or easing:
html
<div class=“sd-animate” style=”–sd-duration: 150ms; –sd-easing: cubic-bezier(.2,.9,.2,1)”>  Content that fades in</div>

Notes and tips

  • If -sd-animation is used by a framework you’re integrating with, check its docs; the framework may read the custom properties directly.
  • A duration of 0ms disables the visible transition—useful when you want conditional toggling without animation.
  • Use animation-fill-mode: both or forwards to keep the final state after the animation ends.

If you’d like, I can convert a specific framework’s syntax to standard CSS or create variations (slide, scale, staggered fades).

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