flexbox
flex布局与绝对定位的关系演示
by Mike Lin
HTML
<div class="container">
<div class="c1">Content 1</div>
<div class="c2">Content 2</div>
</div>
CSS
div.container {
display: flex;
flex-direction: column;
width: 400px;
height: 300px;
align-items: center;
justify-content: center;
outline: 1px solid;
position: relative;
}
div.c1 {
background: #aaeecc;
width: 100px;
position: relative;
z-index: 50;
top: 20px;
display: flex;
}
div.c2 {
background: #cceeaa;
width: 200px;
position: relative;
z-index: 50;
top: 20px;
display: flex;
}
.container:after {
content: '';
background: #ccc;
width: 100px;
height: 100px;
z-index: 0;
// 这个left注释与不注释区别很大
// 目前在chrome61版本下注释掉,after
// 这块是会居中,如果注释去掉,则按照left
// 指定的值进行偏移。但是在ios10的系统上,
// 此时的居中便失去了效果,所以这种系统兼容性的
// 写法就不要写了
// left: 0px;
top: 0px;
position: absolute;
display: flex;
}