​x
 
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<!DOCTYPE html>
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<title>Example</title>
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<style>
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.animate {
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background: yellowgreen;
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color: olivedrab;
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font: 100 16px sans-serif;
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min-height: 50px;
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animation: myAnimation 3s ease 1s 2 forwards;
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}
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​
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@keyframes myAnimation {
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    50% {
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      min-height: 200px;
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    }
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}
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</style>
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​
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​
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<input type="button" class="animate" value="My Button">