ejemplo de transición de opacidad CSS

Ejemplo 1: opacidad de transición css

/* Answer to: "css transition opacity" */

/*
  CSS transitions allows you to change property values smoothly,
  over a given duration.
*/

.myClass {
  vertical-align: top;
  transition: opacity 0.3s; /* Transition should take 0.3s */
  -webkit-transition: opacity 0.3s; /* Transition should take 0.3s */
  opacity: 1; /* Set opacity to 1 */
}

.myClass:hover {
  opacity: 0.5; /* On hover, set opacity to 2 */
}

/* 
  From `opacity: 1;` to `opacity: 0.5;`, the transition time should
  take 0.3 seconds as soon as the client starts to hover over the
  element.
*/

Ejemplo 2: animación de opacidad CSS

<style>
.myelement{
  animation: fade-out;
}

@keyframes fade-out{
  0%{
    opacity: 1.0
  }
  100{
    opacity: 0.0
  }
}
</style>

Ejemplo 3: transición de opacidad en CSS

/*
Opacity transition in CSS

By using this we can add element transition with some delay.
And due to transition delay its look like animation of element.
*/

div {
  transition: opacity 0.5s; /* Transition should take 0.3s */
  -webkit-transition: opacity 0.5s; /* Transition should take 0.3s */
  opacity: 1; /* Set opacity to 1 */
}

/*
I hope it will help you.
Namaste
*/

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