In CSS3, "box-shadow" means "box shadow", which is a new attribute that adds border shadow to elements; this attribute can add one or more shadows to the box, the syntax "box -shadow: horizontal shadow vertical shadow blur distance size color inset;".
The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.
In CSS3, "box-shadow" means "box shadow", which is a new attribute that adds border shadow to elements.
# The box-shadow property adds one or more shadows to the box.
Note: Use border-image-* attributes to construct beautiful scalable buttons!
Syntax:
box-shadow: h-shadow v-shadow blur spread color inset;
box-shadow Adds one or more shadows to the box. This property is a comma-separated list of shadows, each specified by 2-4 length values, an optional color value, and the optional inset keyword. The value for omitted length is 0.
h-shadow Required. The position of the horizontal shadow. Negative values are allowed.
v-shadow Required. The position of the vertical shadow. Negative values are allowed.
blur Optional. Fuzzy distance.
spread Optional. The size of the shadow.
color Optional. The color of the shadow. See CSS color values.
inset Optional. Change the outer shadow (outset) to an inner shadow.
The following are a few small tests I did for everyone:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
div
{
width:300px;
height:100px;
background-color:yellow;
box-shadow: 10px 10px 5px #888888;
}
</style>
</head>
<body>
<div></div>
</body>
</html>Running results:
We also practiced Learn how to create "polaroid" photos and rotate pictures. For example:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
body
{
margin:30px;
background-color:#E9E9E9;
}
div.polaroid
{
width:294px;
padding:10px 10px 20px 10px;
border:1px solid #BFBFBF;
background-color:white;
/* Add box-shadow */
box-shadow:2px 2px 3px #aaaaaa;
}
div.rotate_left
{
float:left;
-ms-transform:rotate(7deg); /* IE 9 */
-webkit-transform:rotate(7deg); /* Safari and Chrome */
transform:rotate(7deg);
}
div.rotate_right
{
float:left;
-ms-transform:rotate(-8deg); /* IE 9 */
-webkit-transform:rotate(-8deg); /* Safari and Chrome */
transform:rotate(-8deg);
}
</style>
</head>
<body>
<div class="polaroid rotate_left">
<img src="/static/imghwm/default1.png" data-src="pulpitrock.jpg" class="lazy" alt="" style="max-width:90%" style="max-width:90%">
<p class="caption">The pulpit rock in Lysefjorden, Norway.</p>
</div>
<div class="polaroid rotate_right">
<img src="/static/imghwm/default1.png" data-src="cinqueterre.jpg" class="lazy" alt="" style="max-width:90%" style="max-width:90%">
<p class="caption">Monterosso al Mare. One of the five villages in Cinque Terre.</p>
</div>
</body>
</html>The running result is as follows:
·There are many kinds of box-shadow shadows, such as: inner shadow, outer shadow, three-sided shadow, and two-sided shadow Shadow, single-sided shadow, western stroke...,
means:
For example:
<div class="flex">
<div class="flex-item">
<h3 id="内阴影示例">内阴影示例</h3>
<div class="box boxshadow1"></div>
</div>
<div class="flex-item">
<h3 id="边内影示例">3边内影示例</h3>
<div class="box boxshadow2"></div>
</div>
<div class="flex-item">
<h3 id="外阴影示例">外阴影示例</h3>
<div class="box boxshadow3"></div>
</div>
<div class="flex-item">
<h3 id="右下外阴影示例">右下外阴影示例</h3>
<div class="box boxshadow4"></div>
</div>
<div class="flex-item">
<h3 id="扩大阴影示例">扩大阴影示例</h3>
<div class="box boxshadow5"></div>
</div>
<div class="flex-item">
<h3 id="半透明阴影色示例">半透明阴影色示例</h3>
<div class="box boxshadow6"></div>
</div>
</div>css:
.flex{display:flex;flex-wrap:wrap;}
.flex-item{margin-right:30px;}
.box { background-color: #CCCCCC; border-radius:10px; width: 200px; height: 200px; }
.boxshadow1{ box-shadow:inset 0px 0px 5px 1px #000; }
.boxshadow2{ box-shadow:inset 0 1px 2px 1px #000; }
.boxshadow3{box-shadow:0 0 10px #000;}
.boxshadow4{box-shadow:2px 2px 5px #000;}
.boxshadow5{box-shadow:0 0 5px 15px #000;}
.boxshadow6{box-shadow: 12px 12px 2px 1px rgba(0, 0, 255, .2);}
Running results:
(Learning video sharing: css video tutorial, web front-end Getting Started Tutorial)
The above is the detailed content of What does box-shadow mean in css3. For more information, please follow other related articles on the PHP Chinese website!
css怎么隐藏元素但不占空间Jun 01, 2022 pm 07:15 PM两种方法：1、利用display属性，只需给元素添加“display:none;”样式即可。2、利用position和top属性设置元素绝对定位来隐藏元素，只需给元素添加“position:absolute;top:-9999px;”样式。
原来利用纯CSS也能实现文字轮播与图片轮播！Jun 10, 2022 pm 01:00 PM怎么制作文字轮播与图片轮播？大家第一想到的是不是利用js，其实利用纯CSS也能实现文字轮播与图片轮播，下面来看看实现方法，希望对大家有所帮助！
css3如何实现鼠标点击图片放大Apr 25, 2022 pm 04:52 PM实现方法：1、使用“:active”选择器选中鼠标点击图片的状态；2、使用transform属性和scale()函数实现图片放大效果，语法“img:active {transform: scale(x轴放大倍数,y轴放大倍数);}”。
css3什么是自适应布局Jun 02, 2022 pm 12:05 PM自适应布局又称“响应式布局”，是指可以自动识别屏幕宽度、并做出相应调整的网页布局；这样的网页能够兼容多个不同的终端，而不是为每个终端做一个特定的版本。自适应布局是为解决移动端浏览网页而诞生的，能够为使用不同终端的用户提供很好的用户体验。
css3动画效果有变形吗Apr 28, 2022 pm 02:20 PMcss3中的动画效果有变形；可以利用“animation:动画属性 @keyframes ..{..{transform:变形属性}}”实现变形动画效果，animation属性用于设置动画样式，transform属性用于设置变形样式。
css3怎么设置动画旋转速度Apr 28, 2022 pm 04:32 PM在css3中，可以利用“animation-timing-function”属性设置动画旋转速度，该属性用于指定动画将如何完成一个周期，设置动画的速度曲线，语法为“元素{animation-timing-function:速度属性值;}”。
css3线性渐变可以实现三角形吗Apr 25, 2022 pm 02:47 PMcss3线性渐变可以实现三角形；只需创建一个45度的线性渐变，设置渐变色为两种固定颜色，一个是三角形的颜色，另一个为透明色即可，语法“linear-gradient(45deg,颜色值,颜色值 50%,透明色 50%,透明色 100%)”。
一文了解CSS3中的新特性 ::target-text 选择器Apr 12, 2022 am 11:24 AM本篇文章带大家一起深入了解一下CSS3中的新特性::target-text 选择器，聊聊该选择器的作用和使用方法，希望对大家有所帮助！
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.
MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
WebStorm Mac version
Useful JavaScript development tools
Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.
