非常教程

CSS参考手册

Miscellaneous Level 1

文本缩进 | text-indent

text-indentCSS属性指定在一个块的文本行之前把压痕(空的空间)的量。默认情况下,这只控制块的第一个格式化行的缩进,但可以使用hangingeach-line关键字来改变这种行为。

/* <length> values */
text-indent: 3mm;
text-indent: 40px;

/* <percentage> value
   relative to the containing block width */
text-indent: 15%;

/* Keyword values */
text-indent: 5em each-line;
text-indent: 5em hanging;
text-indent: 5em hanging each-line;

/* Global values */
text-indent: inherit;
text-indent: initial;
text-indent: unset;

水平间距是相对于包含块级元素的内容框的左侧(或右侧,从右到左布局)的边缘。

Initial value

0

应用对象

block containers

是否可继承

yes

百分比值

refer to the width of the containing block

媒体

visual

计算值

the percentage as specified or the absolute length, plus any keywords as specified

动画类型

a length, percentage or calc();

规范顺序

The length or percentage before the keywords, if both are present. If several keywords are present, they appear in the same order as their appearance in the formal grammar.

语法

<length>缩进被指定为绝对<length>。负值是允许的。查看<length>可能的单位的值。

<percentage>缩进是<percentage>包含块的宽度。

each-line缩进会影响块容器的第一行以及强制换行后的每一行,但不会影响软换行后的行。

hanging反转哪一行是缩进的。第一行之外的所有行将被缩进。

形式语法

<length-percentage> && hanging? && each-line?where 
<length-percentage> = <length> | <percentage>

简单缩进示例

HTML

<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy 
    nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat.</p>
<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy 
    nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat.</p>

CSS

p { 
  text-indent: 5em;
  background: powderblue;
}

缩进百分比示例

HTML

<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy 
    nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat.</p>
<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy 
    nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat.</p>

CSS

p { 
  text-indent: 30%;
  background: plum;
}

规范

Specification

Status

Comment

CSS Text Module Level 3The definition of 'text-indent' in that specification.

Working Draft

Adds the hanging and each-line keywords.

CSS TransitionsThe definition of 'text-indent' in that specification.

Working Draft

Lists text-indent as animatable.

CSS Level 2 (Revision 1)The definition of 'text-indent' in that specification.

Recommendation

The behavior with display: inline-block and anonymous block boxes is explicitly defined.

CSS Level 1The definition of 'text-indent' in that specification.

Recommendation

Initial definition.

浏览器兼容性

Feature

Firefox (Gecko)

Chrome

Edge

Internet Explorer

Opera

Safari

Basic support

1.0 (1.7 or earlier)

1.0

(Yes)

3.0

3.5

1.0 (85)

hanging

No support1

No support

No support

No support

No support

No support

each-line

No support1

No support

No support

No support

No support

No support

Feature

Firefox Mobile (Gecko)

Android

Edge

IE Phone

Opera Mobile

Safari Mobile

Basic support

1.0 (1.9.2)

?

(Yes)

?

?

?

hanging

No support

No support

No support

No support

No support

No support

each-line

No support

No support

No support

No support

No support

No support

CSS

层叠样式表( Cascading Style Sheets )是一种用来表现 HTML 或 XML 等文件样式的计算机语言。CSS 不仅可以静态地修饰网页,还可以配合各种脚本语言动态地对网页各元素进行格式化。

CSS目录

1.动画和转换 | Animations & Transitions
2.背景和边框 | Backgrounds & Borders
3.基本框模型 | Basic Box Model
4.基本用户界面 | Basic User Interface
5.框对齐 | Box Alignment
6. 级联和继承 | Cascading & Inheritance
7.颜色 | Color
8. 合成与混合 | Compositing & Blending
9.条件和规则 | Conditional Rules
10.计数器样式 | Counter Styles
11.设备适配 | Device Adaptation
12.扩展 | Extensions
13.滤镜效果 | Filter Effects
14.灵活的框布局 | Flexible Box Layout
15.字体 | Fonts
16.片段模块 | Fragmentation
17.全屏 API | Fullscreen API
18. 生成内容 | Generated Content
19.网格布局 | Grid Layout
20.图像值 | Image Values
21.初始线格局 | Inline Layout
22.列表和计数器 | Lists & Counters
23.逻辑属性 | Logical Properties
24.面具 | Masking
25.媒体查询 | Media Queries
26.杂项 | Miscellaneous
27.Miscellaneous Level 1
28.Miscellaneous Level 2
29.运动路径 | Motion Path
30. 多列布局 | Multi-column Layout
31.命名空间 | Namespaces
32.项目模型 | Object Model View
33.网页媒体 | Paged Media
34.定位布局 | Positioned Layout
35.伪元素 | Pseudo-
36.节奏大小 | Rhythmic Sizing
37. Ruby布局 | Ruby Layout
38.可缩放矢量图形 | Scalable Vector Graphics
39.滚动快照 | Scroll Snap
40.选择 | Selectors
41.形状 | Shapes
42.文本 | Text
43.文字装饰 | Text Decoration
44.变换 | Transforms
45.值和单位 | Values & Units
46.变量 | Variables
47.写入模型 | Writing Modes
48.CSS 教程
49.CSS 创建
50.CSS Id 和 Class选择器
51.CSS 简介
52.CSS 盒子模型
53.CSS Table(表格)
54.CSS 列表样式(ul)
55.CSS 链接(link)
56.CSS Fonts(字体)
57.CSS Text(文本)
58.CSS Backgrounds(背景)
59.CSS Display(显示) 与 Visibility(可见性)
60.CSS 尺寸 (Dimension)
61.CSS 分组和嵌套
62.CSS 轮廓(outline)属性
63.CSS Border(边框)
64.CSS 图像透明/不透明
65.CSS 导航栏
66.CSS 伪元素
67.CSS 伪类
68.CSS Float(浮动)
69.CSS Position(定位)
70.CSS 总结
71.CSS 属性选择器
72.CSS 媒体类型
73.CSS 图像拼合技术
74.CSS 实例
75.CSS 组合选择符
76.响应式 Web 设计 – 框架
77.响应式 Web 设计 – 视频(Video)
78.CSS 提示工具(Tooltip)
79.CSS 布局 Overflow
80.CSS 计数器
81.CSS 表单