题目描述:
怎么让一个 div 水平垂直居中
<div class="parent">
<div class="child"></div>
</div>
解题:
- 思路一:
div.parent {
display: flex;
justify-content: center;
align-items: center;
}
- 思路二:
div.parent {
position: relative;
}
div.child {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
/* 或者 */
div.child {
width: 50px;
height: 10px;
position: absolute;
top: 50%;
left: 50%;
margin-left: -25px;
margin-top: -5px;
}
/* 或 */
div.child {
width: 50px;
height: 10px;
position: absolute;
left: 0;
top: 0;
right: 0;
bottom: 0;
margin: auto;
}
- 思路三:
div.parent {
display: grid;
}
div.child {
justify-self: center;
align-self: center;
}
+思路四:
div.parent {
font-size: 0;
text-align: center;
&::before {
content: "";
display: inline-block;
width: 0;
height: 100%;
vertical-align: middle;
}
}
div.child{
display: inline-block;
vertical-align: middle;
}
1.通过定位
+ CSS3
的transform
形式, 2.亮点:不需要固定宽高
<div class="div-wrap">
<div class="div-body"> </div>
</div>
<style>
.div-wrap {
width: 200px; height: 200px;
position:relative;
}
.div-body {
width: 100px; height: 100px;
background:#ccc;
position:absolute;
left:50%;
top:50%;
transform: translate(-50%,-50%); //重点这里~
}
</style>
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