css3 代边框的小三角怎么做

发布网友发布时间：2022-04-06 11:48

共3个回答

热心网友时间：2022-04-06 13:17

你好，我这里用CSS实现了三种带边框三角，效果分别如图：

实例代码如下，根据你个人的情况调整代码吧：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Arrow</title>
</head>
<body>
<style>
/* scale */
.arrow,
.arrow:after{
    position: relative;
    display: inline-block;
    width: 0;
    height: 0;
    border-top: 0;
    border-left: 30px dotted transparent;
    border-right: 30px dotted transparent;
    border-bottom: 30px dashed #000;
}
.arrow:after {
    position: absolute;
    top: 0;
    content: '';
    transform: translateX(-50%) scale(.8);
    border-bottom: 30px dashed #fff;
}

/* width & height */
.arrow1,
.arrow1:after {
    position: relative;
    display: inline-block;
    width: 0;
    height: 0;
    border-top: 0;
    border-left: 30px dotted transparent;
    border-right: 30px dotted transparent;
    border-bottom: 30px dashed #000;
}
.arrow1:after {
    position: absolute;
    left: -26px;
    top: 2px;
    content: '';
    width: 0;
    height: 0;
    border-top: 0;
    border-left: 26px dotted transparent;
    border-right: 26px dotted transparent;
    border-bottom: 26px dashed #fff;
}

/* border & after */
.arrow2 {
    position: relative;
    display: inline-block;
    width: 28px;
    height: 28px;
    border: 0;
    border-top: 2px solid #000;
    border-right: 2px solid #000;
    -webkit-transform: translate(7px, 14px) rotate(-45deg);
    -ms-transform: translate(7px, 14px) rotate(-45deg);
    -o-transform: translate(7px, 14px) rotate(-45deg);
    transform: translate(7px, 14px) rotate(-45deg);
}
.arrow2:after {
    position: absolute;
    left: 0;
    top: -2px;
    width: 42px;
    height: 2px;
    content: '';
    border-radius: 2px;
    background-color: #000;
    -webkit-transform-origin: left top;
    -moz-transform-origin: left top;
    -ms-transform-origin: left top;
    -o-transform-origin: left top;
    transform-origin: left top;
    -webkit-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
    -o-transform: rotate(45deg);
    transform: rotate(45deg);
}
</style>
<span class="arrow"></span>
<span class="arrow1"></span>
<span class="arrow2"></span>
</body>
</html>

希望能帮到你，如有疑问请追问，望采纳~

热心网友时间：2022-04-06 14:35

<!DOCTYPE html>
<html>
<head>
<style type='text/css'>

/* 上三角 */
.arrow-up {
width: 0;
height: 0;
border-left: 20px solid transparent;
border-right: 20px solid transparent;
border-bottom: 20px solid green;
}

/* 下三角 */
.arrow-down {
width: 0;
height: 0;
border-left: 20px solid transparent;
border-right: 20px solid transparent;
border-top: 20px solid orange;
}

/* 右三角 */
.arrow-right {
width: 0;
height: 0;
border-top: 60px solid transparent;
border-bottom: 60px solid transparent;
border-left: 60px solid blue;
}

/* 左三角 */
.arrow-left {
width: 0;
height: 0;
border-top: 10px solid transparent;
border-bottom: 10px solid transparent;
border-right: 10px solid silver;
}
</style>
</head>
<body>
<div class="arrow-up"></div>
<div class="arrow-down"></div>
<div class="arrow-left"></div>
<div class="arrow-right"></div>
</body>
</html>

热心网友时间：2022-04-06 16:10

其实用bootstrap插件很好做，它自己里面就有这些功能