The Intro field of the PseudoClass enum represents the :intro pseudo-class. This pseudo-class is applied to all UI elements during their first frame of existence. It is particularly useful for initiating CSS transitions when an element is created, allowing for smooth visual introductions.
Use the Intro pseudo-class to apply styles to elements as they are first rendered. This can be useful for animations or transitions that should occur immediately upon an element's creation.
// Example of using the :intro pseudo-class in a CSS stylesheet
.my-element:intro {
opacity: 0;
transition: opacity 0.5s ease-in;
}
// This will make the element fade in over 0.5 seconds when it is first created.