《HTML5与CSS3基础教程》学习笔记 Three Day - 逆光飞翔23

第十一章

1、  box-sizing：border-box（让宽度和高度包含内边距和边框）

2、  clear让后面的元素显示在浮动元素的后面

3、  z-index只对只对绝对、固定、相对定位的元素有效

4、  vertical-aligh只用于行内元素

baseline/middle/sub/super/text-top/text-bottom/top/bottom/百分比/值

第十二章

1、 

and (min-width/max-width/resolution:value)” href=”” />

2、 

第十三章

1、

<span style="color: #800000;"> body</span>{<span style="color: #ff0000;">

font-family</span>:<span style="color: #0000ff;">’ pt_sansregular’</span>;

}<span style="color: #800000;">

@font-face</span>{<span style="color: #ff0000;">

 font-family</span>:<span style="color: #0000ff;"> 'pt_sansregular'</span>;<span style="color: #ff0000;">
src</span>:<span style="color: #0000ff;"> url('PTS55F-webfont.eot')</span>;<span style="color: #ff0000;">
src</span>:<span style="color: #0000ff;"> url('PTS55F-webfont.eot?#iefix') format('embedded-opentype'),
url('PTS55F-webfont.woff') format('woff'),
url('PTS55F-webfont.ttf') format('truetype')</span>;<span style="color: #ff0000;">
font-weight</span>:<span style="color: #0000ff;"> normal</span>;<span style="color: #ff0000;">
font-style</span>:<span style="color: #0000ff;"> normal</span>;

}

 

第十四章

 

1、  渐变背景

1)        默认情况下，线性渐变是从上往下渐变的， 因此在属性值中不需要指定 to bottom

<span style="color: #800000;">background: aqua;//要放在前面

background: linear-gradient(to top right,blue,green);

background: linear-gradient(90deg,blue,green);(起点：中上线)</span>

 

2)        径向渐变

<span style="color: #008000;">/*</span><span style="color: #008000;"> 默认 </span><span style="color: #008000;">*/</span><span style="color: #800000;">
background: red;
background: radial-gradient(yellow, red);

 background: radial-gradient(at top,yellow, red);

 background: radial-gradient(closest-side at 70px 60px, yellow, lime, red);
background: radial-gradient(30px 30px at 65% 70%, yellow, lime, red)</span>

 

 

2、  元素设置不透明度

• opacity:value

3、  生成内容的效果

<span style="color: #800000;">:before和：after

.more:after </span>{<span style="color: #ff0000;">
content</span>:<span style="color: #0000ff;"> " »"</span>;
}

 

4、  使用 sprite 拼合图像

sprite 就是通过 content:" "; 生成的空格的背景图像。将其设置为display: block;，从而可以设置与图标大小匹配的高度和宽度

<span style="color: #800000;">.icon:before </span>{<span style="color: #ff0000;">
background-image</span>:<span style="color: #0000ff;"> url(sprite.png)</span>;<span style="color: #ff0000;">
content</span>:<span style="color: #0000ff;"> " "</span>;<span style="color: #ff0000;">//-------------------------------------------------
display</span>:<span style="color: #0000ff;"> block</span>;<span style="color: #ff0000;">//
height</span>:<span style="color: #0000ff;"> 16px</span>; <span style="color: #008000;">/*</span><span style="color: #008000;"> 图标高度 </span><span style="color: #008000;">*/</span><span style="color: #ff0000;">
position</span>:<span style="color: #0000ff;"> absolute</span>;<span style="color: #ff0000;">
width</span>:<span style="color: #0000ff;"> 16px</span>; <span style="color: #008000;">/*</span><span style="color: #008000;"> 图标宽度 </span><span style="color: #008000;">*/</span>
}<span style="color: #800000;">
a[href$=".xls"]:before </span>{<span style="color: #ff0000;">
background-position</span>:<span style="color: #0000ff;"> -17px 0</span>;
}<span style="color: #800000;">
a[href$=".docx"]:before </span>{<span style="color: #ff0000;">
background-position</span>:<span style="color: #0000ff;"> -34px 0</span>;
}

 

第十五章

1、    自定义标记

<span style="color: #800000;">ul</span>{<span style="color: #ff0000;">

   list-style</span>:<span style="color: #0000ff;"> none</span>;<span style="color: #ff0000;">

   margin-left</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;">

padding-left</span>:<span style="color: #0000ff;"> 0</span>;

}<span style="color: #800000;">

li</span>{<span style="color: #ff0000;">

   background</span>:<span style="color: #0000ff;"> url(../img/done_square.png) no-repeat 0 .1em</span>;<span style="color: #ff0000;">

   padding-left</span>:<span style="color: #0000ff;"> 15px</span>;<span style="color: #ff0000;">

   line-height</span>:<span style="color: #0000ff;"> 24px</span>;

}

 

2、    选择列表的起始编号

1)         整个列表编码初始值ol里面增加start=”n”

2)         修改有序列表某个列表编码，影响接下来的列表，在li里面增加value=”n”

3、    控制标记的位置

list-style-position=”inside/outside(默认)”

4、    下拉式导航

HTML:

<span style="color: #0000ff;"><span style="color: #800000;">nav </span><span style="color: #ff0000;">role</span><span style="color: #0000ff;">="navigation"</span><span style="color: #0000ff;">></span>

         <span style="color: #0000ff;"><span style="color: #800000;">ul </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="nav"</span><span style="color: #0000ff;">></span>

            <span style="color: #0000ff;"><span style="color: #800000;">li</span><span style="color: #0000ff;">><span style="color: #800000;">a </span><span style="color: #ff0000;">href</span><span style="color: #0000ff;">="/"</span><span style="color: #0000ff;">></span>Home<span style="color: #0000ff;"></span><span style="color: #800000;">a</span><span style="color: #0000ff;">></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span>

            <span style="color: #0000ff;"><span style="color: #800000;">li</span><span style="color: #0000ff;">><span style="color: #800000;">a </span><span style="color: #ff0000;">href</span><span style="color: #0000ff;">="#"</span><span style="color: #0000ff;">></span>Products<span style="color: #0000ff;"></span><span style="color: #800000;">a</span><span style="color: #0000ff;">></span>

                <span style="color: #0000ff;"><span style="color: #800000;">ul </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="subnav"</span><span style="color: #0000ff;">></span>

                   <span style="color: #0000ff;"><span style="color: #800000;">li</span><span style="color: #0000ff;">><span style="color: #800000;">a </span><span style="color: #ff0000;">href</span><span style="color: #0000ff;">="#"</span><span style="color: #0000ff;">></span>Phones<span style="color: #0000ff;"></span><span style="color: #800000;">a</span><span style="color: #0000ff;">></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span>

                   <span style="color: #0000ff;"><span style="color: #800000;">li</span><span style="color: #0000ff;">><span style="color: #800000;">a </span><span style="color: #ff0000;">href</span><span style="color: #0000ff;">="#"</span><span style="color: #0000ff;">></span>Accessories<span style="color: #0000ff;"></span><span style="color: #800000;">a</span><span style="color: #0000ff;">></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span>

                <span style="color: #0000ff;"></span><span style="color: #800000;">ul</span><span style="color: #0000ff;">></span>

            <span style="color: #0000ff;"></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span>

            <span style="color: #0000ff;"><span style="color: #800000;">li</span><span style="color: #0000ff;">><span style="color: #800000;">a </span><span style="color: #ff0000;">href</span><span style="color: #0000ff;">="#"</span><span style="color: #0000ff;">></span>Support<span style="color: #0000ff;"></span><span style="color: #800000;">a</span><span style="color: #0000ff;">></span>

                <span style="color: #0000ff;"><span style="color: #800000;">ul </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="subnav"</span><span style="color: #0000ff;">></span>

                   <span style="color: #0000ff;"><span style="color: #800000;">li</span><span style="color: #0000ff;">><span style="color: #800000;">a </span><span style="color: #ff0000;">href</span><span style="color: #0000ff;">="#"</span><span style="color: #0000ff;">></span>Community Forum<span style="color: #0000ff;"></span><span style="color: #800000;">a</span><span style="color: #0000ff;">></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span>

                   <span style="color: #0000ff;"><span style="color: #800000;">li</span><span style="color: #0000ff;">><span style="color: #800000;">a </span><span style="color: #ff0000;">href</span><span style="color: #0000ff;">="#"</span><span style="color: #0000ff;">></span>Contact Us<span style="color: #0000ff;"></span><span style="color: #800000;">a</span><span style="color: #0000ff;">></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span>

                   <span style="color: #0000ff;"><span style="color: #800000;">li</span><span style="color: #0000ff;">><span style="color: #800000;">a </span><span style="color: #ff0000;">href</span><span style="color: #0000ff;">="#"</span><span style="color: #0000ff;">></span>How-to Guides<span style="color: #0000ff;"></span><span style="color: #800000;">a</span><span style="color: #0000ff;">></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span>

                <span style="color: #0000ff;"></span><span style="color: #800000;">ul</span><span style="color: #0000ff;">></span>

            <span style="color: #0000ff;"></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span>

            <span style="color: #0000ff;"><span style="color: #800000;">li</span><span style="color: #0000ff;">><span style="color: #800000;">a </span><span style="color: #ff0000;">href</span><span style="color: #0000ff;">="#"</span><span style="color: #0000ff;">></span>About Us<span style="color: #0000ff;"></span><span style="color: #800000;">a</span><span style="color: #0000ff;">></span><span style="color: #800000;">li</span><span style="color: #0000ff;">></span>

         <span style="color: #0000ff;"></span><span style="color: #800000;">ul</span><span style="color: #0000ff;">></span>

         <span style="color: #008000;"><!--</span><span style="color: #008000;"> end .nav </span><span style="color: #008000;">--></span>

      <span style="color: #0000ff;"></span><span style="color: #800000;">nav</span><span style="color: #0000ff;">></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>

 

CSS:

<span style="color: #008000;">/*</span><span style="color: #008000;"> 子菜单的默认状态 </span><span style="color: #008000;">*/</span><span style="color: #800000;">

.nav .subnav </span>{<span style="color: #ff0000;">left</span>:<span style="color: #0000ff;"> -999em</span>;<span style="color: #008000;">/*</span><span style="color: #008000;"> 将子菜单移出屏幕 </span><span style="color: #008000;">*/</span><span style="color: #ff0000;">position</span>:<span style="color: #0000ff;"> absolute</span>;<span style="color: #ff0000;">z-index</span>:<span style="color: #0000ff;"> 1000</span>;}<span style="color: #800000;">

a,a:hover </span>{<span style="color: #ff0000;">text-decoration</span>:<span style="color: #0000ff;"> none</span>;}<span style="color: #800000;">

ul </span>{<span style="color: #ff0000;">list-style</span>:<span style="color: #0000ff;"> none</span>;<span style="color: #ff0000;">margin-left</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;">padding-left</span>:<span style="color: #0000ff;"> 0</span>;}<span style="color: #800000;">

.nav </span>{<span style="color: #ff0000;">background</span>:<span style="color: #0000ff;"> #fff</span>;}<span style="color: #800000;">

.nav>li </span>{<span style="color: #ff0000;">float</span>:<span style="color: #0000ff;"> left</span>;<span style="color: #ff0000;">padding-right</span>:<span style="color: #0000ff;"> 10px</span>;}<span style="color: #800000;">

.nav ul </span>{<span style="color: #ff0000;">background</span>:<span style="color: #0000ff;"> #fff</span>;<span style="color: #ff0000;">z-index</span>:<span style="color: #0000ff;"> 1000</span>;<span style="color: #ff0000;">border-bottom</span>:<span style="color: #0000ff;"> 1px solid #fff</span>;}<span style="color: #800000;">

.nav ul li </span>{<span style="color: #ff0000;">border-bottom</span>:<span style="color: #0000ff;"> 1px solid gray</span>;<span style="color: #ff0000;">line-height</span>:<span style="color: #0000ff;"> 24px</span>;<span style="color: #ff0000;">padding</span>:<span style="color: #0000ff;"> 2px 5px</span>;}

<span style="color: #008000;">/*</span><span style="color: #008000;"> 当鼠标停留在父元素li上时子菜单的状态 </span><span style="color: #008000;">*/</span><span style="color: #800000;">

.nav li:hover .subnav </span>{<span style="color: #ff0000;">left</span>:<span style="color: #0000ff;"> auto</span>;<span style="color: #008000;">/*</span><span style="color: #008000;"> 让子菜单回到自然状态 </span><span style="color: #008000;">*/</span>}