JS实现图片垂直居中显示小结

<div class="box"><div class="center">居中效果</div></div>

/*第1种，垂直居中效果*/.box{    width: 200px;height: 200px;border: 1px solid #ccc;    position: relative; }.center{   width: 100px;height: 100px;background: gray;   margin: auto;position: absolute;top: 0;left: 0;bottom: 0;right: 0;  }

<div class="box2"><img class="center2" src="yz_p5.jpeg" alt=""/><span class="block"></span></div>

/*第2种 图片垂直居中*//* span是辅助元素 vertical-align这个属性的特点,它是相对兄弟级行高（line-height）来定位*/.box2{  width: 350px;height: 350px;border: 1px solid #F22727;  text-align: center;}.center2{ vertical-align: middle;}.block{ line-height: 350px;}/*跟父级一样高*/

<div class="box3"><span class="center3"><img src="yz_p5.jpeg" alt=""/></span></div>

/*第3种，居中效果*/.box3{  width: 350px;height: 350px;border: 1px solid #F22727;display: table;text-align: center;}.center3{  display: table-cell;vertical-align: middle;}

<div class="box4"><img class="center4" src="yz_p5.jpeg" alt=""/></div>

/*第4种，居中效果 根据父元素来计算*/.box4{  width:300px;height: 300px;border: 1px solid #F22727;}.center4{  width: 200px;height: 200px;position: relative;left: 16%;top: 19%;}