CSS垂直水平居中-蒲公英云

CSS垂直水平居中

快来打我* 2023-01-14 12:58 364阅读 0赞

效果图：

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列出两种写法：

1.父元素规定子元素内容垂直居中

display: flex;
align-items: center;
justify-content: center;
<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
        <title></title>
        <script src="js/vue.js" type="text/javascript" charset="utf-8"></script>
        <style type="text/css">
            .block {
                height: 300px;
                width: 300px;
                border: 1px solid #FF0000;
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .item {
                width: 100px;
                color: red;
            }
        </style>
    </head>
    <body>
        <div class="block">
            <div class="item">
                实现30秒倒计时
                实现30秒倒计时
            </div>
        </div>
    </body>
</html>

2.子元素自己垂直水平居中

position:relative;
left: 50%;
top: 50%;
transform:translate(-50%,-50%);
<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
        <title></title>
        <script src="js/vue.js" type="text/javascript" charset="utf-8"></script>
        <style type="text/css">
            .block {
                height: 300px;
                width: 300px;
                border: 1px solid #FF0000;
            }
            .item {
                width: 100px;
                color: red;
                position:relative;
                left: 50%;
                top: 50%;
                transform:translate(-50%,-50%);
            }
        </style>
    </head>
    <body>
        <div class="block">
            <div class="item">
                实现30秒倒计时
                实现30秒倒计时
            </div>
        </div>
    </body>
</html>