CSS simulate click event
.modify:active div{
color: red;
}
.singout:active div{
color: red;
}
css simulate focus event
&:focus-within {
border: 1px solid #d57da7;
}
&:focus-within .icno_usename {
background: url("../images/use_active.png") no-repeat;
background-size: 100% 100%;
}
css downward subscript display
.to_bottom {
position: absolute;
top:90px;
left: 45px;
width: 0;
height: 0;
border-top: 10px solid #FFFFFF;;
border-left: 10px solid transparent;
border-right: 10px solid transparent;
}
Rules for using flex
Rules for using flex