CSS Animation property stays after animating

问题

I'm trying to get a CSS animation property to stay after completing, is this possible?

This is what I'm trying to achieve...

The element should be hidden when the user lands on the page, after 3 seconds (or whatever), it should fade in and once the animation has completed it should stay there.

Here is a fiddle attempt... http://jsfiddle.net/GZx6F/

Here is the code for preservation...

<h2>Test</h2>

<style>
@keyframes fadeIn {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 0.9;
    }
}

h2 {
    animation: fadeIn 1s ease-in-out 3s;
}
</style>

I know how to do this with jQuery.. it would be like this...

<h2>test</h2>

<script>
  $(document).ready(function(){
    $('h2').hide().delay(3000).fadeIn(3000)
  });
</script>

回答1:

I think you're looking for animation-fill-mode CSS3 property

https://developer.mozilla.org/en/CSS/animation-fill-mode

The animation-fill-mode CSS property specifies how a CSS animation should apply styles to its target before and after it is executing.

for your purpose just try to set

h2 {
  animation: fadeIn 1s ease-in-out 3s;
  animation-fill-mode: forwards;  
}

Setting forwards value «the target will retain the computed values set by the last keyframe encountered during execution»

回答2:

In addition to the answer of @Fabrizio Calderan, it has to be said that you can even apply the animation-fill-mode property forwards directly to animation. So the following should also work:

@keyframes fadeIn {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 0.9;
  }
}

h2 {
  opacity: 0;
  animation: fadeIn 1s ease-in-out 3s forwards;
}

<script src="//cdnjs.cloudflare.com/ajax/libs/prefixfree/1.0.7/prefixfree.min.js"></script>
<h2>Test</h2>

回答3:

I had something similar happening to me. I added position:relative to the element that was animating and that fixed it for me.

回答4:

How to animate an element and get it to stay as the animation is done:

// Beggin

#box {
  /* Give it a width, a height and a background so can see it  */
  width: 200px;
  height: 200px;
  /* Unimportant styling */
  box-shadow: 0 0 10px 0 rgba(0, 0, 0, .4) inset;
  border-radius: 7px;
  background: linear-gradient(to bottom, #fff 30%, #fcfcfc 40%, #f8f8f8 50%, #f0f0f0 100%);
  
  /* Starts here: */
  opacity: 0;
  animation: yourName 2800ms ease-in-out 0s forwards;
}

@keyframes yourName {
  0% /* (from) */ {
    opacity: 0;
  }
  100% /* (to) */ {
    opacity: 1;
  }
}

<div id="box"></div>

来源：https://stackoverflow.com/questions/9774829/css-animation-property-stays-after-animating

标签

css

css3

css-animations