css幾種垂直居中的方式（面試常考題1）
阿新 • • 發佈：2019-01-30
水平垂直居中（一）定位和需要定位的元素的margin減去寬高的一半
<style> *{ padding: 0; margin: 0; } .box{ width: 300px; height: 300px; background:#e9dfc7; border:1px solid red; position: relative; } img{ width: 100px; height: 150px; position: absolute; top: 50%; left: 50%; margin-top: -75px; margin-left: -50px; } </style> <!--html --> <body> <div class="box" >  </div> </body>
水平垂直居中（二）定位和margin:auto;
<style> *{ padding: 0; margin: 0; } .box{ width: 300px; height: 300px; background:#e9dfc7; border:1px solid red; position: relative; } img{ width: 100px; height: 100px; position: absolute; top: 0; left: 0; right: 0; bottom: 0; margin: auto; } </style> <!--html --> <body> <div class="box" >  </div> </body>
水平垂直居中（三）絕對定位和transfrom
<style> *{ padding: 0; margin: 0; } .box{ width: 300px; height: 300px; background:#e9dfc7; border:1px solid red; position: relative; } img{ width: 100px; height: 100px; position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); } </style> <!--html --> <body> <div class="box" >  </div> </body>
水平垂直居中（四）diplay：table-cell
<style>
.box{
width: 300px;
height: 300px;
background:#e9dfc7;
border:1px solid red;
display: table-cell;
vertical-align: middle;
text-align: center;
}
img{
width: 100px;
height: 150px;
/*margin: 0 auto;*/ 這個也行
}
</style>
<!--html -->
<body>
<div class="box" >
</div>
</body>水平垂直居中（五）flexBox居中（移動端使用沒什麼負擔）
<style>
.box{
width: 300px;
height: 300px;
background:#e9dfc7;
border:1px solid red;
display: flex;
justify-content: center;
align-items:center;
}
img{
width: 150px;
height: 100px;
}
</style>
<!--html -->
<body>
<div class="box" >
</div>
</body>