p]:inline” data-streamdown=”list-item”>How Eurofighter06 Compares to Other 5th-Gen Fighters

Those are CSS custom properties (variables) likely used by a design system or animation utility to control a simple fade-in animation. Explanation:

• –sd-animation: sd-fadeIn;
  • Names the animation to apply (likely defined elsewhere as a keyframes rule named “sd-fadeIn” or mapped by a library).
• –sd-duration: 250ms;
  • Duration of the animation (250 milliseconds).
• –sd-easing: ease-in;
  • Timing function that controls acceleration (ease-in starts slow and speeds up).

How they’d be used (example pattern):

• A library or component reads these variables and sets animation properties, e.g.:
  • animation-name: var(–sd-animation);
  • animation-duration: var(–sd-duration);
  • animation-timing-function: var(–sd-easing);

If the keyframes aren’t defined, define them yourself:

@keyframes sd-fadeIn {from { opacity: 0; transform: translateY(6px); }  to   { opacity: 1; transform: translateY(0); }}

Quick example applying the variables:

.element {  –sd-animation: sd-fadeIn;  –sd-duration: 250ms;  –sd-easing: ease-in;  animation-name: var(–sd-animation);  animation-duration: var(–sd-duration);  animation-timing-function: var(–sd-easing);  animation-fill-mode: both;}

Swap values to customize: change duration (e.g., 500ms), easing (e.g., cubic-bezier(.2,.8,.2,1)), or animation name to use different keyframes.