文件類型
<!DOCTYPE HTML PUBLIC ><!DOCTYPE html>
使用video和audio標籤播放影片和音訊
<video controls> <source src="video/video.webm" type="video/webm"/> <source src="video/video.mp4" type="video/mp4"/> </video>
2.彈性盒子
#box-sizing :border-box/content-box(
預設值
##3.圓角邊框
Border-raduis:左上角,右上角,右下角,左下角。
##shape 的意思是圖形,CSS shapes 也就是CSS 圖形的意思,也就是使用CSS 產生各種圖形(圓形、矩形、橢圓、多邊形等幾何圖形)。
CSS3CSS3出來後,我們有了更廣闊的施展空間,透過
##border-radius
#border
#transform
border-radius),下面稍微列舉一些其他幾何圖形:
//01圆角边的css #circle{ width: 300px; height: 300px; border: 1px solid red; border-radius: 10px; box-shadow: 5px 5px 5px green; }<div id="circle">我是圆角边的div</div>//02圆形的css加图片#circleshape{ width: 300px; height: 300px; border: 1px solid red; border-radius: 150px; background: url("img/001.jpg") 0px 0px no-repeat; background-size: cover; opacity: 0.7; transition: all 5s; } #circleshape:hover{ transform: rotate(300deg) scale(1.5); transition: all 5s linear; }<div id="circleshape">我是圆形的div</div>//03半圆形的CSS #halfcircle{ width: 300px; height: 150px; border: 1px solid red; border-radius: 150px 150px 0px 0px; background:linear-gradient(to top,pink,palegreen); background:radial-gradient(palegoldenrod,palevioletred); }<div id="halfcircle">我是半圆形的div</div>//04四分之一圆形 #halfcircles{ width: 150px; height: 150px; border: 1px solid red; border-radius: 150px 0px 0px 0px; }<div id="halfcircles">我是四分之一圆形的div</div> #halfcircless{ width: 150px; height: 150px; border: 1px solid red; border-radius: 0px 150px 0px 0px; }<div id="halfcircless">我是四分之一圆形的div</div> #halfcirclesss{ width: 150px; height: 150px; border: 1px solid red; border-radius: 0px 0px 0px 150px; }<div id="halfcirclesss">我是四分之一圆形的div</div>#halfcirclessss{ width: 150px; height: 150px; border: 1px solid red; border-radius: 0px 0px 150px 0px; }<div id="halfcirclessss">我是四分之一圆形的div</div> #halfcircl{ width: 300px; height: 150px; border: 1px solid red; border-radius: 0px 0px 150px 150px; }<div id="halfcircl">我是半圆形的div</div>//05:三角形 .traingle { width: 0; height: 0; border-left: 50px solid transparent; border-right: 50px solid transparent; border-bottom: 100px solid yellowgreen; }<div class="traingle ">我的三角形,我是div</div>//06:切角:多重线性渐变实现切角。 .notching { width: 40px; height: 40px; padding: 40px; background: linear-gradient(135deg, transparent 15px, yellowgreen 0) top left, linear-gradient(-135deg, transparent 15px, yellowgreen 0) top right, linear-gradient(-45deg, transparent 15px, yellowgreen 0) bottom right, linear-gradient(45deg, transparent 15px, yellowgreen 0) bottom left; background-size: 50% 50%; background-repeat: no-repeat; }<div class="notching">我是切角,我是div</div>//07:椭圆形 .ellipse { width: 120px; height: 160px; background-color: yellowgreen; border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%; }<div class="ellipse">我是椭圆形,我是div</div>08:梯形:伪元素加旋转透视实现梯形 .trapezoid{ position: relative; width: 60px; padding: 60px; } .trapezoid::before{ content:""; position: absolute; top: 0; right: 0; bottom: 0; left: 0; transform: perspective(20px) scaleY(1.3) rotateX(5deg); transform-origin: bottom; background: yellowgreen; }<div class="trapezoid">我是上面短的梯形,我是div</div>.trapezoids { position: relative; width: 60px; border-top: 60px solid yellowgreen; border-left: 40px solid transparent; border-right: 40px solid transparent; }<div class="trapezoids">我是下面短的梯形,我是div</div>//09.五边形:梯形加上三角形,很容易就组合成一个五边形,这里需要借助一个伪元素实现:.pentagon { position: relative; width: 60px; border-bottom: 60px solid yellowgreen; border-left: 40px solid transparent; border-right: 40px solid transparent; } .pentagon::before { content:""; position: absolute; top: 60px; left: -40px; border-top: 60px solid yellowgreen; border-left: 70px solid transparent; border-right: 70px solid transparent; }//10六边形看看上面的梯形,如果两个反方向且底边同样大小的梯形,叠加在一起,是不是就能得到一个六边形呢 .pentagon { position: relative; width: 60px; border-bottom: 60px solid yellowgreen; border-left: 40px solid transparent; border-right: 40px solid transparent; } .pentagon::before { content: ""; position: absolute; width: 60px; height: 0px; top: 60px; left: -40px; border-top: 60px solid yellowgreen; border-left: 40px solid transparent; border-right: 40px solid transparent; }//11:八边形六边形都解决了,八边形也不在话下,一个矩形加上两个梯形,可以合成一个八边形。 .octagon { position: relative; width: 40px; height: 100px; background: yellowgreen; } .octagon::before { content: ""; height: 60px; position: absolute; top: 0; left: 40px; border-left: 30px solid yellowgreen; border-top: 20px solid transparent; border-bottom: 20px solid transparent; } .octagon::after { content: ""; height: 60px; position: absolute; top: 0; left: -30px; border-right: 30px solid yellowgreen; border-top: 20px solid transparent; border-bottom: 20px solid transparent; }//12:五角星好的,探索完多边形,我们继续探索X角星。 先来看看五角星,要怎么实现呢?当然是直接打出来啦 -- ★☆ .star { margin: 50px 0; position: relative; width: 0; border-right: 100px solid transparent; border-bottom: 70px solid yellowgreen; border-left: 100px solid transparent; transform: rotate(35deg) scale(.6); } .star:before { content: ''; position: absolute; border-bottom: 80px solid yellowgreen; border-left: 30px solid transparent; border-right: 30px solid transparent; top: -45px; left: -65px; transform: rotate(-35deg); } .star:after { content: ''; position: absolute; top: 3px; left: -105px; border-right: 100px solid transparent; border-bottom: 70px solid yellowgreen; border-left: 100px solid transparent; transform: rotate(-70deg); }//12:六角星六角星呢?想象一下,一个向上的三角形 ▲,叠加上一个向下的三角形 ▼,就可以得到一个六边形: .sixstar { position: relative; width: 0; border-left: 50px solid transparent; border-right: 50px solid transparent; border-bottom: 100px solid yellowgreen; } .sixstar:after { content: ""; position: absolute; border-left: 50px solid transparent; border-right: 50px solid transparent; border-top: 100px solid yellowgreen; top: 30px; left: -50px; }//13:八角星八角星呢?八个角那么多呢。其实使用两个矩形进行旋转拼接就可以了。 .eightstar { position: relative; width: 100px; height: 100px; background-color: yellowgreen; transform: rotate(30deg); } .eightstar::before { content: ""; position: absolute; top: 0; left: 0; width: 100px; height: 100px; transform: rotate(45deg); background-color: yellowgreen; }//14:十二角星好。最后多角星再来一个十二级角星。在八角星的基础上,再增加一个矩形,就能得到十二角啦。也就是要过第一个伪元素。 .twelvestar { position: relative; width: 100px; height: 100px; margin-bottom: 100px!important; background-color: yellowgreen; transform: rotate(30deg); } .twelvestar::before { content: ""; position: absolute; top: 0; left: 0; width: 100px; height: 100px; transform: rotate(30deg); background-color: yellowgreen; } .twelvestar::after { content: ""; position: absolute; top: 0; left: 0; width: 100px; height: 100px; transform: rotate(60deg); background-color: yellowgreen; }
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