实现div在屏幕水平垂直居中的4个方法:
CSS:

<style>
        *{
            margin: 0;
            padding: 0;
        }
        .div1 { 
                position:absolute; 
                width:200px; 
                height:200px; 
                top:50%; 
                left:50%; 
                margin-left:-100px; 
                margin-top:-100px; 
                background: yellow;
            }
        .div2 {
            width: 200px;
            height: 200px;
            background-color: pink;
            position: absolute;
            top: 0;
            left: 0;
            right: 0;    
            bottom: 0;
            margin: auto;
        }
        .div3{
            width: 200px;
            height: 200px;
            background-color: skyblue;
            position: absolute;
            top: calc(50% - 100px); /* 必须要有空格 */
            left: calc(50% - 100px);
        }
        .div4{
            width: 200px;
            height: 200px;
            background-color: red;
            position: absolute;
            top: 50%; 
            left: 50%;
            transform: translate(-50%,-50%);
        }
    </style>

HTML:

    <!-- <div class="div1"></div> -->
    <!-- <div class="div2"></div> -->
    <!-- <div class="div3"></div> -->
    <div class="div4"></div>

如果你有更多更好的方法,欢迎亲们补充。


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