table of Contents
Tags written fast
总结：‘.’点代表class类，‘#’代表id，‘$’代表数字从1开始，‘>’代表儿子
div.c1#d1 按下tab键
效果：
<div class="c1" id="d1"></div>
div.c$#d$*2 按下tab键
效果：
<div class="c1" id="d1"></div>
<div class="c2" id="d2"></div>
div.c$#d${文本}*2
效果：
<div class="c1" id="d1">文本</div>
<div class="c2" id="d2">文本</div>
div>(p>a)*10
效果：
<div>
<p><a href=""></a></p>
<p><a href=""></a></p>
<p><a href=""></a></p>
<p><a href=""></a></p>
<p><a href=""></a></p>
<p><a href=""></a></p>
<p><a href=""></a></p>
<p><a href=""></a></p>
<p><a href=""></a></p>
<p><a href=""></a></p>
</div> Width and height
height: 200px; # 高度200px
width: 200px; # 宽度200pxFonts
1. The text font
body {
font-family: "Microsoft Yahei", "微软雅黑", "Arial", sans-serif
}2. Font Size
p {
font-size: 14px;
}3. Font weight
font-weight is used to set the font of the word weight (thickness).
| value | description |
|---|---|
| normal | The default value, standard thickness |
| bold | Bold face |
| bolder | Thicker |
| lighter | thinner |
| 100~900 | Set specific thickness, 400 is equivalent to the normal, bold and is equivalent to 700 |
| inherit | Inherit the parent element font weight values |
4. Font Color
- 十六进制值 - 如: ＃FF0000
- 一个RGB值 - 如: rgb(255,0,0)
- 一个RGB值 - 如: rgba(255,0,0,0.3) # 第四个值为alpha，控制透明度
- 颜色的名称 - 如: red5. Font Alignment
text-align property predetermined level alignment of the text elements.
| value | description |
|---|---|
| left | The default value is left-aligned |
| right | Align Right |
| center | Align |
| justify | Justify |
6. Underline Text Control
text-decoration property to add special effects to text.
| value | description |
|---|---|
| none | default. Text defined criteria. |
| underline | The next line of text is defined. |
| overline | A text line definition. |
| line-through | Define a line passing through the text. |
| inherit | Text-decoration property inherited value of the parent element. |
Commonly used to remove a label from the default scribe:
a {
text-decoration: none;
}7. The first line indent text
The first line of a paragraph indent 32 pixels:
p {
text-indent: 32px;
}8. English font change capital
text-transform
| value | description |
|---|---|
| none | default. Defined text with lowercase and uppercase letters standards. |
| text-transform：capitalize | Text each word beginning with a capital letter. |
| text-transform：uppercase | Defined only capital letters. |
| text-transform：lowercase | No definition of uppercase letters, lowercase letters only. |
| text-transform：inherit | Provision should inherit the value of the text-transform property from the parent element. |
Background Properties
1. Background Color
/*背景颜色*/
background-color: red;2. Background image
/*背景图片*/
background-image: url('1.jpg');3. Do not tile background
background-repeat:repeat(默认):背景图片平铺排满整个网页
background-repeat:repeat-x：背景图片只在水平方向上平铺
background-repeat:repeat-y：背景图片只在垂直方向上平铺
background-repeat:no-repeat：背景图片不平铺4. Background position
background-position: 100px 10px; !*第一个调节左右 第二个调节上下The stationary background image
Custom background image with the roll axis moves
background-attachment: fixed;
background: url("111.png") center center;
background-attachment: fixed;Case:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>滚动背景图示例</title>
<style>
* {
margin: 0;
}
.box {
width: 100%;
height: 500px;
background: url("http://gss0.baidu.com/94o3dSag_xI4khGko9WTAnF6hhy/zhidao/wh%3D450%2C600/sign=e9952f4a6f09c93d07a706f3aa0dd4ea/4a36acaf2edda3cc5c5bdd6409e93901213f9232.jpg") center center;
background-attachment: fixed;
}
.d1 {
height: 500px;
background-color: tomato;
}
.d2 {
height: 500px;
background-color: steelblue;
}
.d3 {
height: 500px;
background-color: mediumorchid;
}
</style>
</head>
<body>
<div class="d1"></div>
<div class="box"></div>
<div class="d2"></div>
<div class="d3"></div>
</body>
</html>
6. shorthand method
background:#336699 url('1.png') no-repeat left top;frame
1. border properties (width, style, color)
border-width
border-style
border-colorCommonly used shorthand way:
#i1 {
border: 2px solid red;
}2. Border Style
| value | description |
|---|---|
| none | Rimless. |
| dotted | Dot dashed border. |
| dashed | Rectangular dotted border. |
| solid | Solid border. |
3. Set up and down the border
#d1 {
border-top-style:dotted; # 上边框类型
border-top-color: red; # 上边框颜色
border-right-style:solid; # 右边框类型
border-bottom-style:dotted; # 底部边框类型
border-left-style:none; 做边框类型
}4. disposed circular border
This effect can be achieved with attribute rounded border.
The border-radius set to be longer or to obtain a high half circular
div {
height: 200px;
width: 200px;
border-radius: 50%; # 宽的50%，高的50%。出来就是圆
background-color: red;
background-repeat: no-repeat; # 禁止平铺
}
The exemplary circular Avatar
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
body {
margin: 0;
background-color: antiquewhite;
}
.c1 {
height: 100px;
width: 100px;
border-radius: 50%;
border: 5px solid white;
overflow: hidden;
}
img {
max-width: 100%;
}
</style>
</head>
<body>
<div class="c1">
<img src="111.png" alt="">
</div>
</body>
</html>
6.display control display
HTML elements for controlling the display.
| value | significance |
|---|---|
| display:"none" | HTML document element exists, but does not display in the browser. JavaScript code typically used for mating. |
| display:"block" | Default occupies the entire width of the page, if you specify the width of the set, with the margin remaining part will be filled. |
| display:"inline" | Press display inline elements, then re-set the element's width, height, margin-top, margin-bottom and float property will not be affected. |
| display:"inline block" | At the same time that the element has the characteristics of inline elements and block-level elements. |
Box model
margin: 用于控制元素与元素之间的距离；margin的最基本用途就是控制元素周围空间的间隔，从视觉角度上达到相互隔开的目的。
padding: 用于控制内容与边框之间的距离；
Border(边框): 围绕在内边距和内容外的边框。
Content(内容): 盒子的内容，显示文本和图像。margin outer border
.margin-test {
margin-top:5px; # 上外边框距离
margin-right:10px; # 右外边框距离
margin-bottom:15px; # 底部外边框距离
margin-left:20px; # 左边外边框距离
}Shorthand:
.margin-test {
margin: 5px 10px 15px 20px; # 上右下左，顺时针
}Common Center:
.mycenter {
margin: 0 auto;
}padding inside filling
.padding-test {
padding-top: 5px; # 上内边框距离
padding-right: 10px; # 右内边框距离
padding-bottom: 15px; # 底部内边框距离
padding-left: 20px; # 左边内边框距离
}Recommended use shorthand:
.padding-test {
padding: 5px 10px 15px 20px;
}Order: on the right lower left
Supplementary padding commonly used shorthand way:
- A, for the four sides;
- Providing two, one for the first - next, the second for left - right;
- If three provided, for the first, second for left - right, for the third;
- Providing four parameter values, will be the - Right - lower - left order to act on the four sides;
float float
Method 1. Floating
Are three values:
float: left：向左浮动
float: right：向右浮动
float: none：默认值，不浮动clear attributes specify which element prevents the other side floating elements.
| value | description |
|---|---|
| left | Not allowed to float on the left. |
| right | On the right side floating elements are not allowed. |
| both | Left and right sides are not allowed to float. |
| none | Defaults. Allowing the floating element appear on both sides. |
| inherit | Clear provisions should inherit the property value from the parent element. |
2.clear
clear attributes specify which element prevents the other side floating elements.
| value | description |
|---|---|
| left | Not allowed to float on the left. |
| right | On the right side floating elements are not allowed. |
| both | Left and right sides are not allowed to float. |
| none | Defaults. Allowing the floating element appear on both sides. |
| inherit | Clear provisions should inherit the property value from the parent element. |
Note: clear property only for their own work, without affecting other elements.
3. Clear float
Clear float side-effects (collapse parent tag question)
There are three main ways:
- Fixed height
- Clear pseudo-element method
- overflow:hidden
Clear pseudo-element method (use more):
.clearfix:after {
content: "";
display: block;
clear: both;
}overflow overflow property
| value | description |
|---|---|
| visible | Defaults. Content will not be pruned, there will be elements outside the box. |
| hidden | Content will be trimmed, and the remaining content is not visible. |
| scroll | Content will be trimmed, but the browser will display the scroll bar to view the rest of the content. |
| auto | If the content is pruned, the browser will display the scroll bar to view the rest of the content. |
| inherit | Provision should inherit the value of the overflow property from the parent element. |
.c1 {
height: 100px;
width: 100px;
border: 1px solid black;
overflow: auto;
}
Locate
position: relative; # 绝对定位
position: absolute; # 相对定位
left: 100px; # 距离左边100px
left: 50%; # 距离左边50%距离
top: 100px; # 距离上面100px;
top:50%; # 距离上面50%的距离相对定位 relative
相当于标签原有的位置做偏移
了解即可
绝对定位 absolute
相当于已经定位过的(static>>>relative)父标签做偏移
eg:
小米购物车
固定定位 fixed
相当于浏览器窗口固定在某个位置始终不变
eg:
回到顶部Fixed positioning:
.cc{
position: fixed;
bottom: 20px;
right: 20px;
height: 50px;
width: 100px;
}
<div class="cc">回到顶部</div>z-index control from the z-axis
Laminating order of the objects is provided.
- z-index value indicates Who pressing, a large value to cover small pressure value,
- Only the positioning of the elements, in order to have z-index, that is to say, regardless of the relative positioning, absolute positioning, fixed positioning, you can use z-index, but can not use the floating element z-index
- z-index value has no units, is a positive integer, the default z-index value of zero if we do not have z-index value, or z-index value is the same, then who wrote the HTML behind, someone who is pressing on it, positioning the elements, the elements do not always suppress positioning.
- From the parent phenomenon: the father counsels his son and then regressed useless
#d1 {
z-index: 999;
}
#d2 {
z-index: 1000;
}
结果：优先展示d2的transparency
Used to define the transparency. In the range from 0 to 1,0 it is completely transparent, 1 is completely opaque.
.c2 {
background-color: rgb(128,128,128);
opacity: 0.4;
}