why this css animation not working? -


could please tell me why animation not working in code?

.alltopics {    height: 100px;    width: 100%;    background: linear-gradient(135deg, #ff3300, #cc00cc);    animation: topicbackground 10s ease infinite;  }    /* safari 4.0 - 8.0 */  @-webkit-keyframes topicbackground {    0%   { background-position: 0% 50%;}    50%  { background-position: 100% 50%;}    100% { background-position: 0% 50%;}  }    /* standard syntax */  @keyframes topicbackground {     0%   { background-position: 0% 50%;}    50%  { background-position: 100% 50%;}    100% { background-position: 0% 50%;}  }
<div class="alltopics"></div>

the goal make div have gradient background , animate between 2 colours , forth.

you're trying animate background-position won't work linear gradient. it's not image, therefore doesn't have background-position.

unfortunately there's no straight-forward way animate gradients in css, can check out this tutorial workarounds.

edit

after discussion in comment can apparently make work using background-size property value that's above 100%, background-size: 400% 400%.


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