wp-calypso/client/assets/stylesheets/shared/_animation.scss

/**
 * Animations
 */

// Simple animations to make elements appear
@keyframes appear {
	0% {
		opacity: 0;
	}
	100% {
		opacity: 1;
	}
}

@keyframes appearWithScaling {
	0% {
		transform: scale(0.9, 0.9);
		opacity: 0;
	}
	100% {
		transform: scale(1, 1);
		opacity: 1;
	}
}

// Useful for the checked state of radio button fields
@keyframes grow {
	0% {
		transform: scale(0.3);
	}

	60% {
		transform: scale(1.15);
	}

	100% {
		transform: scale(1);
	}
}

// Pulsing background color for loading placeholders
@keyframes pulse-light {
	50% {
		background-color: var(--color-neutral-0);
	}
}

// Pulsing background color for loading placeholders
@keyframes highlight {
	50% {
		background-color: var(--color-warning-10);
	}
}

// Another pulsing animation for placeholders
@keyframes loading-fade {
	0% {
		opacity: 0.5;
	}
	50% {
		opacity: 1;
	}
	100% {
		opacity: 0.5;
	}
}