小编Rac*_*Man的帖子

如何将time变量的内容显示为contentCSS中的属性？

JavaScript的:

function clock(){
    var d = new Date();
    var hour = d.getHours();
    var min = d.getMinutes();
    var time = hour + ":" + min;
}

CSS:

.screen{
    position: absolute;
    height: 75%;
    width: 75%;
    background: #98E8EE;
    top: 11.5%;
    left: 12.5%;
}

.screen::after{
    color: #F9F5F4;
    font-size: 40px;
    content: ;
    font-family: Arial;
    margin-left: 36.5px;
    top: 20px;
    position: relative
}