Endless Rotating DIV but with Absolute Positioning

问题

I'm facing a problem, I have a div with an absolute position, and I'm trying to rotate it 360 degrees with an endless looping. But if I use the transform: translate (-50%,-50%) to fully center this div, it won't work properly.

HTML

<div class="randomName"></div>

CSS

.randomName {
background-color: orange;
width: 1500px;
height: 1500px;
position: absolute;
left: 50%;
top: 50%;
transform: translate(-50%,-50%);
animation: orbita 2s linear infinite;
-webkit-animation: orbita 2s linear infinite;
-moz-animation: orbita 2s linear infinite;
-o-animation: orbita 2s linear infinite;
}

@keyframes orbita {
0%  {transform: rotate(0deg);}
100% {transform: rotate(360deg);}  
}

Not sure why is not working. Can someone guide me? thanks!

回答1:

When using the animation you are overriding the initial transform property by specifying a new one. Instead you need to append rotation to translate in order to keep both of them working:

.randomName {
  background-color: orange;
  width: 150px;
  height: 150px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  animation: orbita 2s linear infinite;
  -webkit-animation: orbita 2s linear infinite;
  -moz-animation: orbita 2s linear infinite;
  -o-animation: orbita 2s linear infinite;
}

@keyframes orbita {
  0% {
    transform:translate(-50%, -50%) rotate(0deg);
  }
  100% {
    transform:translate(-50%, -50%) rotate(360deg);
  }
}

<div class="randomName"></div>

Another solution is to center your element using another way and keep the animation as it is.

Here is an example using flex to center the element:

body {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.randomName {
  background-color: orange;
  width: 150px;
  height: 150px;
  animation: orbita 2s linear infinite;
  -webkit-animation: orbita 2s linear infinite;
  -moz-animation: orbita 2s linear infinite;
  -o-animation: orbita 2s linear infinite;
}

@keyframes orbita {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

<div class="randomName"></div>

来源：https://stackoverflow.com/questions/47955244/endless-rotating-div-but-with-absolute-positioning