neuralstreamcore4.sbs

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

This CSS snippet defines three custom properties used to control a simple fade-in animation.

What each part does

  • -sd-animation: sd-fadeIn;
    Selects the animation variant (here named sd-fadeIn). This is a custom property — you need corresponding CSS that uses it (e.g., applied as the animation-name).
  • –sd-duration: 0ms;
    Sets the animation duration to 0 milliseconds. That effectively disables visible animation; the final state applies immediately.
  • –sd-easing: ease-in;
    Sets the timing function to ease-in, meaning the animation (if duration > 0) would start slowly and speed up.

How to use it in CSS

Provide keyframes for the named animation and read the custom properties when declaring the animation:

css
:root {–sd-animation: sd-fadeIn;  –sd-duration: 300ms; /* override default 0ms to see effect /  –sd-easing: ease-in;}
/ Keyframes for sd-fadeIn /@keyframes sd-fadeIn {  from { opacity: 0; transform: translateY(8px); }  to   { opacity: 1; transform: translateY(0); }}
/ Utility class that applies the animation using the custom properties */.sd-animated {  animation-name: var(–sd-animation);  animation-duration: var(–sd-duration);  animation-timing-function: var(–sd-easing);  animation-fill-mode: both;}

Practical notes

  • With –sd-duration: 0ms, elements will jump to the final state instantly; set a positive duration (e.g., 200–400ms) to see a smooth fade.
  • Store animation name and parameters as custom properties to allow easy overrides per component or state.
  • Include animation-fill-mode: both so the end state persists after the animation.
  • Combine opacity with slight translate for a more natural entrance.

Example usage in HTML

html
<div class=“sd-animated” style=”–sd-duration: 250ms;”>  Content that fades in</div>

This applies the sd-fadeIn animation with a 250ms duration and ease-in timing, producing a subtle upward fade-in.

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