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新属性
下面是 CSS3 新增的 CSS3 属性列表。
animation (and eight associated longhand properties)
background-clip
background-origin
background-size
border-radius (and four associated longhand properties)
border-image (and six associated longhand properties)
box-decoration-break
box-shadow
box-sizing
columns (and thirteen associated multi-column properties)
clear-after
flex (and eleven associated flexbox properties)
font-stretch
font-size-adjust
font-synthesis
font-kerning
font-variant-caps
hanging-punctuation
hyphens
icon
image-resolution
image-orientation
line-break
object-fit
object-position
opacity
outline-offset
overflow-wrap / word-wrap
backface-visibility
perspective
perspective-origin
pointer-events (for HTML)
resize
tab-size
text-align-last
text-decoration-line
text-decoration-skip
text-decoration-position
text-decoration-style
text-emphasis (and three associated properties)
text-justify
text-orientation
text-overflow
transform
transform-style
text-shadow
transition (and four associated longhand properties)
word-break
word-spacing
writing-mode
新的值
在 CSS3 中为 CSS2.1 新增的取值，下面是每个属性新值的列表。
Value “local” for the background-attachment property
Value "rgba()" for any property that accepts a color value
Value "hsl()" for any property that accepts a color value
Value "hsla()" for any property that accepts a color value
Value "currentColor" for any property that accepts a color value
Value "inset()" for the clip property
Value "linear-gradient()" for any property that accepts an image value
Value "radial-gradient()" for any property that accepts an image value
Value "repeating-linear-gradient()" for any property that accepts an image value
Value "repeating-radial-gradient()" for any property that accepts an image value
Value "image()" for any property that accepts an image value
Multiple comma-separated images for any property that accepts an image value
Multiple comma-separated background-related values to match multiple background image declarations
Value "center" for the position property
Value "page" for the position property
Value "space" for the background-repeat property
Value "round" for the background-repeat property
15 new values for the cursor property
Values "flex" and "inline-flex" for the display property
Values "all-small-caps", "petite-caps", "all-petite-caps", "titling-caps", and "unicase" for the font-variant property
Multiple, space-separated values for the letter-spacing property
New values for the text-align property, including "
text-decoration is now a shorthand property
Keywords "hanging" and "each-line" declared along with length or percentage values for the tfext-indent property
Value "full-width" for the text-transform property
rem units for lengths
calc() units for lengths
toggle() units
Angle units (deg, grad, rad, turn)
Time units (s, ms)
新选择器
下面是 CSS3 中新增的选择器。
Substring matching attribute selectors ([att^=val], [att$=val], [att*=val])
:target pseudo-class
New pseudo-classes: :enabled, :disabled, :checked, and :indeterminate
:root pseudo-class
New expression-based structural pseudo-classes: :nth-child(), :nth-last-child(), :nth-of-type(), :nth-last-of-type()
Other new structural pseudo-classes: :last-child, :first-of-type, :last-of-type, :only-child, :only-of-type, :empty
The negation pseudo-class :not()
Four pseudo-elements with double-colon syntax (::first-line, ::first-letter,::before, ::after)
The following-sibling combinator (p ~ img)
::selection pseudo-class (removed from the spec, but everyone uses it)
其它新特性
其它 CSS2.1 没有包含的特性。
@font-face
Media Queries
Keyframe animations using @keyframes
Conditional styles using @supports
Namespacing using @namespace
Regions
Filters
仍在变化中的特性
上面的列表并不详尽，还有很多仍然在发展中的规范，并没有太多的浏览器支持，下面是这些新模块的列表。
Counter Styles Level 3
Device Adaptation
Display Module Level 3
Line Grid
Mobile Text Size Adjustment
CSS Variables
Box Alignment
The "all" property
Exclusions and Shapes
Generated Content for Paged Media
Grid Layout
Grid Template Layout
Line Layout Module
New features in Lists and Counters
Overflow Module
New features in Paged Media
New features in CSS Sizing
Media Queries Level 4
Selectors Level 4
ch units
Viewport relative lengths
New resolution units
Compositing and Blending
New features in CSS speech
The unicode-range descriptor for @font-face
New features in CSS Images and Replaced Content
CSS Masking
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