<div class="container">
<div class="box bi">双方向の変化(ゆっくり変化しゆっくり戻る)</div>
<div class="box uni">一方向の変化(ゆっくり変化し即座に戻る)</div>
</div>
.container {
width: 100vw;
height: 100vh;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
>.box {
display: flex;
justify-content: center;
align-items: center;
width: 100%;
height: 100px;
margin: 8px;
padding: 8px;
color: white;
&.bi {
background-color: red;
transition: all 1s;
&:hover {
background-color: blue;
}
}
&.uni {
background-color: red;
&:hover {
background-color: blue;
transition: all 1s;
}
}
}
}
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