CODEWITHSUNDEEP
htmlcssanimationtransitionviewport
cdxJava
cdxJava

Reputation: 27

Change background-image with CSS animation

How can I make this class change its background-image after 2 seconds of the div being in viewport? It's not changing for me:

.cover-gradient {
  background-image: none;
}

.cover-gradient:after {
  opacity: 1;
  transition: 0.3s;
  animation: fadeMe 2s linear;
}

@keyframes fadeMe {
  0% {
    background-image: none;
  }
  100% {
    background-image: linear-gradient(to right, rgba(179, 49, 95, 0.5), rgba(58, 0, 117, 0.5));
  }
}

Thanks.

Upvotes: 0

Views: 2241

Answers (1)

Gareth
Gareth

Reputation: 26

When animating in CSS, you need to animate between two similar values.

For example, this will work:

max-height: 0px; and max-height: 100px;

and this will not:

max-height: none; and max-height: 100px;

However, for performance reasons, it's advisable to use opacity and transform properties when animating in CSS

.cover-gradient {
  height: 100vh;
  width: 100vw;
  opacity: 0;
  animation: fadeMe 0.3s linear;
  animation-delay: 2s;
  animation-fill-mode: forwards;
  background-image: linear-gradient(to right, rgba(179, 49, 95, 0.5), rgba(58, 0, 117, 0.5));
}

@keyframes fadeMe {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

https://jsfiddle.net/hellogareth/j3ytzq52/22

Upvotes: 1

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