css 样式正三角，倒三角小三角

提示框、菜单栏的三角样式

效果图

精髓

 正三角
.h{
            width: 0;
            height: 0;
            border: 6px solid transparent;
            border-bottom-color: rgb(19, 95, 236);
        }
倒三角
        .y{
            width: 0;
            height: 0;
            border: 6px solid transparent;
            border-top-color: rgb(238, 15, 15);
        }

demo代码

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div{
            width: 100px;
            height: 100px;
            border: 1px solid salmon ;
            margin: 20px auto;
        }
        .h{
            width: 0;
            height: 0;
            border: 6px solid transparent;
            border-bottom-color: rgb(19, 95, 236);
        }
        .y{
            width: 0;
            height: 0;
            border: 6px solid transparent;
            border-top-color: rgb(238, 15, 15);
        }
        .aaa{
            position: relative;

        }
        .ttt{
            border: none ;
            background-color: cornflowerblue;
        }
        .ttt:before {
            content: "";
            position: absolute;
            top: 15px;
            left: 45%;
            width: 0;
            height: 0;
            border-color: transparent transparent cornflowerblue;
            border-style: solid;
            border-width: 0 4px 5px;
        }
    </style>
</head>
<body>
    <div>
        <h4>正三角</h4>
        <div class="h"></div>
    </div>
    <div>
        <h4>倒三角</h4>
        <div class="y"></div>
    </div>
    <div class="aaa">
        <div class="ttt">
            hello 芹菜是一根葱
        </div>
    </div>
    
</body>
</html>

posted on 2023-01-11 18:15 芹菜是一根葱阅读(322) 评论(0) 收藏举报