水平居中和垂直居中是前端开发过程中肯定会遇到的问题,下面我讲解几种常见的方式。
The HTML
<div class="container">
<!--// Any content in here will be centered.-->
<img src="fireworks.jpg" alt="fireworks">
</div>
The CSS
.container{
display: flex;
justify-content: center;
align-items: center;
}
The HTML
.item{
margin:0 auto;
width:200px;
height:200px;
}
.item{
width:300px;
height:200px;
position:absolute;
left:50%;
top:50%;
margin:-100px 0 0 -150px;
//或者 margin: auto;
}
$(window).resize(function(){
$('.item').css({
position:'absolute',
left: ($(window).width() - $('.item').outerWidth())/2,
top: ($(window).height() - $('.item').outerHeight())/2
});
});
// To initially run the function:
$(window).resize();
The CSS
.item{
position: fixed;
margin: auto;
top: 0;
right: 0;
left: 0;
bottom: 0;
width: 200px;
height: 100px;
}
注意,父元素的宽度需要被定义,同时父元素的vertical-align以及item的margin: auto都是缺一不可的 The CSS
.container {
width: 400px;
display: table-cell;
vertical-align: middle;
}
.item {
margin: 0 auto;
}