Exploring the use of CSS animation instead of animated GIFs for loading wheels.
Check out a simple example here.
#me {
-webkit-animation: rotation 2s infinite linear;
}
@-webkit-keyframes rotation {
from {-webkit-transform: rotate(0deg);}
to {-webkit-transform: rotate(360deg);}
}
Is it possible to adjust the frame rate to have only 12 frames per cycle? This change would mimic the less smooth animation of the animated GIF it is replacing.
Any insights on how to achieve this?
In order to get the desired easing effect, it is recommended to use the steps() function instead of linear.
For a live example, visit: http://jsfiddle.net/trolleymusic/uTd3x/
The animation value has been updated from:
-webkit-animation: rotation 2s infinite linear;
to:
-webkit-animation: rotation 2s infinite steps(12);
The number within the steps function indicates the number of frames the animation will be divided into.
For more information, check out this resource: http://css-tricks.com/snippets/css/keyframe-animation-syntax/ - look for the Steps() section halfway down the page.
Transform the animation to a fading effect and utilize the CSS transform rotation property to position each block at 30-degree intervals. Implement the animation on all blocks with a delay of 0.1s for each.
.wheel {
position:absolute; display:none;
}
.wheel li {
width:4px; height:11px; position:absolute; -webkit-transform-origin:3px 21px; background:#222; border-radius:4px; list-style:none; display:block; opacity:.25; box-shadow:0 0 1px rgba(255,255,255,0.9);
}
.wheel li:nth-child(1) { -webkit-transform:rotate(30deg); -webkit-animation:fadeshift 1.2s infinite linear 0s; }
.wheel li:nth-child(2) { -webkit-transform:rotate(60deg); -webkit-animation:fadeshift 1.2s infinite linear 0.1s; }
.wheel li:nth-child(3) { -webkit-transform:rotate(90deg); -webkit-animation:fadeshift 1.2s infinite linear 0.2s; }
.wheel li:nth-child(4) { -webkit-transform:rotate(120deg); -webkit-animation:fadeshift 1.2s infinite linear 0.3s; }
.wheel li:nth-child(5) { -webkit-transform:rotate(150deg); -webkit-animation:fadeshift 1.2s infinite linear 0.4s; }
.wheel li:nth-child(6) { -webkit-transform:rotate(180deg); -webkit-animation:fadeshift 1.2s infinite linear 0.5s; }
.wheel li:nth-child(7) { -webkit-transform:rotate(210deg); -webkit-animation:fadeshift 1.2s infinite linear 0.6s; }
.wheel li:nth-child(8) { -webkit-transform:rotate(240deg); -webkit-animation:fadeshift 1.2s infinite linear 0.7s; }
.wheel li:nth-child(9) { -webkit-transform:rotate(270deg); -webkit-animation:fadeshift 1.2s infinite linear 0.8s; }
.wheel li:nth-child(10) { -webkit-transform:rotate(300deg); -webkit-animation:fadeshift 1.2s infinite linear 0.9s; }
.wheel li:nth-child(11) { -webkit-transform:rotate(330deg); -webkit-animation:fadeshift 1.2s infinite linear 1s; }
.wheel li:nth-child(12) { -webkit-transform:rotate(360deg); -webkit-animation:fadeshift 1.2s infinite linear 1.1s; }
@-webkit-keyframes fadeshift {
from { opacity:1; } to { opacity:.1; }
}
<div class="appload wheel"><li></li><li></li><li></li><li></li><li></li><li></li><li></li><li></li><li></li><li></li><li></li></div>
Therefore, it is demonstrated.
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