<div class="circle"> 
<p>
  전환 속성을 사용하지 않으면, 이벤트가 발생 시 즉시 전환 됩니다.
 </p>
</div>
.circle p {
    font-size: 16px;
    text-align: center;
    position: relative;
    top: 45%;
    margin: 0;
}

.circle {
    width: 300px;
    height: 300px;
    background-color: magenta;
    margin: 0;
}

.circle:hover {
    background-color: cyan;
    border-radius: 50%;
}

External CSS

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External JavaScript

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