day08

垂直水平居中3种方案

1.margin加position

//HTML

//CSS

     .two{
            width: 800px;
            height: 800px;
            background-color: blueviolet;
            position: relative;
        }
        .one{
            width: 200px;
            height: 200px;
            background-color: aquamarine;
            position: absolute;
            margin:auto;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
        }

2.transform加position

//HTML

//CSS
        .two{
            width: 800px;
            height: 800px;
            background-color: blueviolet;
            position: relative;
        }
        .one{
            width: 200px;
            height: 200px;
            background-color: aquamarine;
            position: absolute;
            transform: translate(-50%,-50%);
            top: 50%;left: 50%;
        }

3. margin加position

//HTML

//CSS
        .two{
            width: 800px;
            height: 800px;
            background-color: blueviolet;
            position: relative;
        }
        .one{
            width: 200px;
            height: 200px;
            background-color: aquamarine;
            position: absolute;
            top: 50%;left: 50%;
            margin-top: -100px;
            margin-left: -100px;
        }

sass