# 居中
测试示例
<div class='parent'>
<div class='child'></div>
</div>
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.parent {
width: 200px;
height: 100px;
background: red;
}
.child {
width: 20px;
height: 20px;
background: yellow;
}
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# 水平居中
- 方案1
.child {
margin: 0 auto;
}
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- 方案2
.parent{
text-align:center;
}
.child{
display:inline-block;
}
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- 方案3
.parent{
position:relative;
}
.child{
position:absolute;
left:50%;
transform:translateX(-50%)
}
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- 方案4
.parent{
display:flex;
justify-content:center;
}
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# 垂直居中
- 方法1
.parent {
position: relative;
}
.child {
position: absolute;
top: 50%;
transform: translateY(-50%);
}
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- 方法2
.parent {
display:flex;
align-items:center;
}
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# 水平垂直居中
- 方案1
.parent {
display: flex;
justify-content: center;
align-items: center;
}
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- 方案2
.parent {
position: relative;
}
.child {
position: absolute;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
}
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