HTML+css盒子模型案例(圆，半圆等)“border-radius” 简单易上手

原作者: [db:作者] 来自: [db:来源] 收藏邀请

很多小伙伴在前端学习的时候，发现盒子模型默认为正方形。如何把盒子变成想要的模型呢？首先我们来看一下默认的情况----

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=, initial-scale=1.0">
    <style>
        .box{
            width: 100px;
            height: 100px;
            background-color: rgb(116, 51, 51);
            box-shadow:0 10px 10px red;
            text-align: center;
            position:absolute;
            margin:0 auto;   
            left:0;
            right:0;
            bottom:0;
            top:0;

        }
    </style>
    <title>Document</title>
</head>
<body>
    <div class="box">

    </div>
</body>
</html>

默认情况下为正方形，也许小伙伴觉得不太好看。我们换成圆形的试试！

<!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">
    <style>
        .box{
            width: 100px;
            height: 100px;
            border-radius: 50%;
            background-color: rgb(28, 99, 60);
            border: 5px solid rgb(55, 0, 255);
            position: absolute;
            margin: 0 auto;
            left: 0;
            right: 0;
            bottom: 0;
            top: 0;
        }
    </style>
    <title>Round</title>
</head>
<body>
    <div class="box">

    </div>
</body>
</html>

看一下我们变成了圆形！来看看半圆形的吧！

<!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">
    <style>
        .box{
            width: 100px;
            height: 50px;
            background-color: rgb(175, 42, 216);
            border: 3px solid rgb(26, 236, 26);
            border-top-right-radius: 50px;
            border-top-left-radius: 50px;
            position:absolute;
            margin: 0 auto;
            left: 0;
            right: 0;
            bottom: 0;
            top: 0;
        }
    </style>
    <title>semicircle</title>
</head>
<body>
    <div class="box">

    </div>
</body>
</html>

来试试其他形状!

<!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">
    <style>
        .box{
            width: 100px;
            height: 100px;
            background-color: rgb(82, 84, 223);
            border-radius: 20px 15px 20px 10px;
            position: absolute;
            margin: 0 auto;
            left: 0;
            bottom: 0;
            right: 0;
            top: 0;
        }
    </style>
    <title>demo</title>
</head>
<body>
    <div class="box">

    </div>
</body>
</html>

知识点分析：