How to Create an Endless CSS Rotation Animation for Loading Icons?

Endless CSS Rotation Animation

Loading icons are essential for user experience, providing visual feedback during website loading. Customizing the rotation of these icons using CSS can enhance their functionality and aesthetics. However, implementing infinite rotation with CSS can prove challenging.

Consider the following example:

#test {
    width: 32px;
    height: 32px;
    background: url('refresh.png');
}

.rotating {
    -webkit-transform: rotate(360deg);
    -webkit-transition-duration: 1s;
    -webkit-transition-delay: now;
    -webkit-animation-timing-function: linear;
    -webkit-animation-iteration-count: infinite;
}

<div id='test' class='rotating'></div>

While this CSS appears intuitive, it fails to produce the intended infinite rotation for the loading icon. To achieve endless rotation, the animation must be applied using keyframes instead of transformations.

The corrected CSS using keyframes follows:

@-webkit-keyframes rotating /* Safari and Chrome */ {
  from {
    -webkit-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  to {
    -webkit-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}
@keyframes rotating {
  from {
    -ms-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -webkit-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  to {
    -ms-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -webkit-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}

.rotating {
  -webkit-animation: rotating 2s linear infinite;
  -moz-animation: rotating 2s linear infinite;
  -ms-animation: rotating 2s linear infinite;
  -o-animation: rotating 2s linear infinite;
  animation: rotating 2s linear infinite;
}

This corrected code ensures smooth and continuous rotation of the loading icon indefinitely, enhancing its functionality and visual appeal.

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