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CSS Reference

CSS Reference CSS Selectors CSS Functions CSS Reference Aural CSS Web Safe Fonts CSS Animatable CSS Units CSS PX-EM Converter CSS Colors CSS Color Values CSS3 Browser Support

CSS Properties

align-content align-items align-self all animation animation-delay animation-direction animation-duration animation-fill-mode animation-iteration-count animation-name animation-play-state animation-timing-function backface-visibility background background-attachment background-blend-mode background-clip background-color background-image background-origin background-position background-repeat background-size border border-bottom border-bottom-color border-bottom-left-radius border-bottom-right-radius border-bottom-style border-bottom-width border-collapse border-color border-image border-image-outset border-image-repeat border-image-slice border-image-source border-image-width border-left border-left-color border-left-style border-left-width border-radius border-right border-right-color border-right-style border-right-width border-spacing border-style border-top border-top-color border-top-left-radius border-top-right-radius border-top-style border-top-width border-width bottom box-shadow box-sizing caption-side clear clip color column-count column-fill column-gap column-rule column-rule-color column-rule-style column-rule-width column-span column-width columns content counter-increment counter-reset cursor direction display empty-cells filter flex flex-basis flex-direction flex-flow flex-grow flex-shrink flex-wrap float font @font-face font-family font-size font-size-adjust font-stretch font-style font-variant font-weight hanging-punctuation height justify-content @keyframes left letter-spacing line-height list-style list-style-image list-style-position list-style-type margin margin-bottom margin-left margin-right margin-top max-height max-width @media min-height min-width nav-down nav-index nav-left nav-right nav-up opacity order outline outline-color outline-offset outline-style outline-width overflow overflow-x overflow-y padding padding-bottom padding-left padding-right padding-top page-break-after page-break-before page-break-inside perspective perspective-origin position quotes resize right tab-size table-layout text-align text-align-last text-decoration text-decoration-color text-decoration-line text-decoration-style text-indent text-justify text-overflow text-shadow text-transform top transform transform-origin transform-style transition transition-delay transition-duration transition-property transition-timing-function unicode-bidi vertical-align visibility white-space width word-break word-spacing word-wrap z-index



 

CSS Reference

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Note w3ii' CSS reference is tested regularly with all major browsers.

CSS Properties

CSS Property Groups


The "CSS" column indicates in which CSS version the property is defined (CSS1, CSS2, or CSS3).

Color Properties

Property Description CSS
color Sets the color of text 1
opacity Sets the opacity level for an element 3

Background and Border Properties

Property Description CSS
background A shorthand property for setting all the background properties in one declaration 1
background-attachment Sets whether a background image is fixed or scrolls with the rest of the page 1
background-blend-mode Specifies the blending mode of each background layer (color/image) 3 
background-color Specifies the background color of an element 1
background-image Specifies one or more background images for an element 1
background-position Specifies the position of a background image 1
background-repeat Sets how a background image will be repeated 1
background-clip Specifies the painting area of the background 3
background-origin Specifies where the background image(s) is/are positioned 3
background-size Specifies the size of the background image(s) 3
border Sets all the border properties in one declaration 1
border-bottom Sets all the bottom border properties in one declaration 1
border-bottom-color Sets the color of the bottom border 1 
border-bottom-left-radius Defines the shape of the border of the bottom-left corner 3
border-bottom-right-radius Defines the shape of the border of the bottom-right corner 3
border-bottom-style Sets the style of the bottom border 1
border-bottom-width Sets the width of the bottom border 1
border-color Sets the color of the four borders 1
border-image A shorthand property for setting all the border-image-* properties 3
border-image-outset Specifies the amount by which the border image area extends beyond the border box 3
border-image-repeat Specifies whether the border image should be repeated, rounded or stretched 3
border-image-slice Specifies how to slice the border image 3
border-image-source Specifies the path to the image to be used as a border 3
border-image-width Specifies the widths of the image-border 3
border-left Sets all the left border properties in one declaration 1
border-left-color Sets the color of the left border 1
border-left-style Sets the style of the left border 1
border-left-width Sets the width of the left border 1
border-radius A shorthand property for setting all the four border-*-radius properties 3
border-right Sets all the right border properties in one declaration 1
border-right-color Sets the color of the right border 1
border-right-style Sets the style of the right border 1
border-right-width Sets the width of the right border 1
border-style Sets the style of the four borders 1
border-top Sets all the top border properties in one declaration 1
border-top-color Sets the color of the top border 1
border-top-left-radius Defines the shape of the border of the top-left corner 3
border-top-right-radius Defines the shape of the border of the top-right corner 3
border-top-style Sets the style of the top border 1
border-top-width Sets the width of the top border 1
border-width Sets the width of the four borders 1
box-decoration-break Sets the behaviour of the background and border of an element at page-break, or, for in-line elements, at line-break. 3
box-shadow Attaches one or more drop-shadows to the box 3

Basic Box Properties

Property Description CSS
bottom Specifies the bottom position of a positioned element 2
clear Specifies which sides of an element where other floating elements are not allowed 1
clip Clips an absolutely positioned element 2
display Specifies how a certain HTML element should be displayed 1
float Specifies whether or not a box should float 1
height Sets the height of an element 1
left Specifies the left position of a positioned element 2
margin Sets all the margin properties in one declaration 1
margin-bottom Sets the bottom margin of an element 1
margin-left Sets the left margin of an element 1
margin-right Sets the right margin of an element 1
margin-top Sets the top margin of an element 1
max-height Sets the maximum height of an element 2
max-width Sets the maximum width of an element 2
min-height Sets the minimum height of an element 2
min-width Sets the minimum width of an element 2
overflow
 Specifies what happens if content overflows an element's box 2
overflow-x Specifies whether or not to clip the left/right edges of the content, if it overflows the element's content area 3
overflow-y Specifies whether or not to clip the top/bottom edges of the content, if it overflows the element's content area 3
padding Sets all the padding properties in one declaration 1
padding-bottom Sets the bottom padding of an element 1
padding-left Sets the left padding of an element 1
padding-right Sets the right padding of an element 1
padding-top Sets the top padding of an element 1
position Specifies the type of positioning method used for an element (static, relative, absolute or fixed) 2
right Specifies the right position of a positioned element 2
top Specifies the top position of a positioned element 2
visibility Specifies whether or not an element is visible 2
width Sets the width of an element 1
vertical-align Sets the vertical alignment of an element 1
z-index Sets the stack order of a positioned element 2

Flexible Box Layout

Property Description CSS
align-content Specifies the alignment between the lines inside a flexible container when the items do not use all available space 3
align-items Specifies the alignment for items inside a flexible container 3
align-self Specifies the alignment for selected items inside a flexible container 3
flex Specifies the length of the item, relative to the rest 3
flex-basis Specifies the initial length of a flexible item 3
flex-direction Specifies the direction of the flexible items 3
flex-flow A shorthand property for the flex-direction and the flex-wrap properties 3
flex-grow Specifies how much the item will grow relative to the rest 3
flex-shrink Specifies how the item will shrink relative to the rest 3
flex-wrap Specifies whether the flexible items should wrap or not 3
justify-content Specifies the alignment between the items inside a flexible container when the items do not use all available space 3
order Sets the order of the flexible item, relative to the rest 3

Text Properties

Property Description CSS
hanging-punctuation Specifies whether a punctuation character may be placed outside the line box 3
hyphens Sets how to split words to improve the layout of paragraphs 3
letter-spacing Increases or decreases the space between characters in a text 1
line-break Specifies how/if to break lines 3
line-height Sets the line height 1
overflow-wrap Specifies whether or not the browser may break lines within words in order to prevent overflow (when a string is too long to fit its containing box) 3
tab-size Specifies the length of the tab-character 3
text-align Specifies the horizontal alignment of text 1
text-align-last Describes how the last line of a block or a line right before a forced line break is aligned when text-align is "justify" 3
text-combine-upright Specifies the combination of multiple characters into the space of a single character 3
text-indent Specifies the indentation of the first line in a text-block 1
text-justify Specifies the justification method used when text-align is "justify" 3
text-transform Controls the capitalization of text 1
white-space Specifies how white-space inside an element is handled 1
word-break Specifies line breaking rules for non-CJK scripts 3
word-spacing Increases or decreases the space between words in a text 1
word-wrap Allows long, unbreakable words to be broken and wrap to the next line 3

Text Decoration Properties

Property Description CSS
text-decoration Specifies the decoration added to text 1
text-decoration-color Specifies the color of the text-decoration 3
text-decoration-line Specifies the type of line in a text-decoration 3
text-decoration-style Specifies the style of the line in a text decoration 3
text-shadow Adds shadow to text 3
text-underline-position Specifies the position of the underline which is set using the text-decoration property 3

Font Properties

Property Description CSS
@font-face A rule that allows websites to download and use fonts other than the "web-safe" fonts 3
@font-feature-values Allows authors to use a common name in font-variant-alternate for feature activated differently in OpenType 3
font Sets all the font properties in one declaration 1
font-family Specifies the font family for text 1
font-feature-settings Allows control over advanced typographic features in OpenType fonts 3
font-kerning Controls the usage of the kerning information (how letters are spaced) 3
font-language-override Controls the usage of language-specific glyphs in a typeface 3
font-size Specifies the font size of text 1
font-size-adjust Preserves the readability of text when font fallback occurs 3
font-stretch Selects a normal, condensed, or expanded face from a font family 3
font-style Specifies the font style for text 1
font-synthesis Controls which missing typefaces (bold or italic) may be synthesized by the browser 3
font-variant Specifies whether or not a text should be displayed in a small-caps font 1
font-variant-alternates Controls the usage of alternate glyphs associated to alternative names defined in @font-feature-values 3
font-variant-caps Controls the usage of alternate glyphs for capital letters 3
font-variant-east-asian Controls the usage of alternate glyphs for East Asian scripts (e.g Japanese and Chinese) 3
font-variant-ligatures Controls which ligatures and contextual forms are used in textual content of the elements it applies to 3
font-variant-numeric Controls the usage of alternate glyphs for numbers, fractions, and ordinal markers 3
font-variant-position Controls the usage of alternate glyphs of smaller size positioned as superscript or subscript regarding the baseline of the font 3
font-weight Specifies the weight of a font 1

Writing Modes Properties

Property Description CSS
direction Specifies the text direction/writing direction 2
text-orientation Defines the orientation of the text in a line 3
text-combine-upright Specifies the combination of multiple characters into the space of a single character 3
unicode-bidi Used together with the direction property to set or return whether the text should be overridden to support multiple languages in the same document 2
writing-mode 3

Table Properties

Property Description CSS
border-collapse Specifies whether or not table borders should be collapsed 2
border-spacing Specifies the distance between the borders of adjacent cells 2
caption-side Specifies the placement of a table caption 2
empty-cells Specifies whether or not to display borders and background on empty cells in a table 2
table-layout Sets the layout algorithm to be used for a table 2

Lists and Counters Properties

Property Description CSS
counter-increment Increments one or more counters 2
counter-reset Creates or resets one or more counters 2
list-style Sets all the properties for a list in one declaration 1
list-style-image Specifies an image as the list-item marker 1
list-style-position Specifies if the list-item markers should appear inside or outside the content flow 1
list-style-type Specifies the type of list-item marker 1

Animation Properties

Property Description CSS
@keyframes Specifies the animation code 3
animation A shorthand property for all the animation properties (except animation-play-state and animation-fill-mode) 3
animation-delay Specifies a delay for the start of an animation 3
animation-direction Specifies whether or not the animation should play in reverse on alternate cycles 3
animation-duration Specifies how many seconds or milliseconds an animation takes to complete one cycle 3
animation-fill-mode Specifies a style for the element when the animation is not playing (when it is finished, or when it has a delay) 3
animation-iteration-count Specifies the number of times an animation should be played 3
animation-name Specifies the name of the @keyframes animation 3
animation-play-state Specifies whether the animation is running or paused 3
animation-timing-function Specifies the speed curve of an animation 3

Transform Properties

Property Description CSS
backface-visibility Defines whether or not an element should be visible when not facing the screen 3
perspective Specifies the perspective on how 3D elements are viewed 3
perspective-origin Specifies the bottom position of 3D elements 3
transform Applies a 2D or 3D transformation to an element 3
transform-origin Allows you to change the position on transformed elements 3
transform-style Specifies how nested elements are rendered in 3D space 3

Transitions Properties

Property Description CSS
transition A shorthand property for setting the four transition properties 3
transition-property Specifies the name of the CSS property the transition effect is for 3
transition-duration Specifies how many seconds or milliseconds a transition effect takes to complete 3
transition-timing-function Specifies the speed curve of the transition effect 3
transition-delay Specifies when the transition effect will start 3

Basic User Interface Properties

Property Description CSS
box-sizing Tells the browser what the sizing properties (width and height) should include 3
content Used with the :before and :after pseudo-elements, to insert generated content 2
cursor Specifies the type of cursor to be displayed 2
ime-mode Controls the state of the input method editor for text fields 3
nav-down Specifies where to navigate when using the arrow-down navigation key 3
nav-index Specifies the tabbing order for an element 3
nav-left Specifies where to navigate when using the arrow-left navigation key 3
nav-right Specifies where to navigate when using the arrow-right navigation key 3
nav-up Specifies where to navigate when using the arrow-up navigation key 3
outline Sets all the outline properties in one declaration 2
outline-color Sets the color of an outline 2
outline-offset Offsets an outline, and draws it beyond the border edge 3
outline-style Sets the style of an outline 2
outline-width Sets the width of an outline 2
resize Specifies whether or not an element is resizable by the user 3
text-overflow Specifies what should happen when text overflows the containing element 3

Multi-column Layout Properties

Property Description CSS
break-after Specifies the page-, column-, or region-break behavior after the generated box 3
break-before Specifies the page-, column-, or region-break behavior before the generated box 3
break-inside Specifies the page-, column-, or region-break behavior inside the generated box 3
column-count Specifies the number of columns an element should be divided into 3
column-fill Specifies how to fill columns 3
column-gap Specifies the gap between the columns 3
column-rule A shorthand property for setting all the column-rule-* properties 3
column-rule-color Specifies the color of the rule between columns 3
column-rule-style Specifies the style of the rule between columns 3
column-rule-width Specifies the width of the rule between columns 3
column-span Specifies how many columns an element should span across 3
column-width Specifies the width of the columns 3
columns A shorthand property for setting column-width and column-count 3
widows Sets the minimum number of lines that must be left at the top of a page when a page break occurs inside an element 2

Paged Media

Property Description CSS
orphans Sets the minimum number of lines that must be left at the bottom of a page when a page break occurs inside an element 2
page-break-after Sets the page-breaking behavior after an element 2
page-break-before Sets the page-breaking behavior before an element 2
page-break-inside Sets the page-breaking behavior inside an element 2

Generated Content for Paged Media

Property Description CSS
marks Adds crop and/or cross marks to the document 3
quotes Sets the type of quotation marks for embedded quotations 2

Filter Effects Properties

Property Description CSS
filter Defines effects (e.g. blurring or color shifting) on an element before the element is displayed 3

Image Values and Replaced Content

Property Description CSS
image-orientation Specifies a rotation in the right or clockwise direction that a user agent applies to an image (This property is likely going to be deprecated and its functionality moved to HTML) 3
image-rendering Gives a hint to the browser about what aspects of an image are most important to preserve when the image is scaled 3
image-resolution Specifies the intrinsic resolution of all raster images used in/on the element 3
object-fit Specifies how the contents of a replaced element should be fitted to the box established by its used height and width 3
object-position Specifies the alignment of the replaced element inside its box 3

Masking Properties

Property Description CSS
mask 3
mask-type 3

Speech Properties

Property Description CSS
mark A shorthand property for setting the mark-before and mark-after properties 3
mark-after Allows named markers to be attached to the audio stream 3
mark-before Allows named markers to be attached to the audio stream 3
phonemes Specifies a phonetic pronunciation for the text contained by the corresponding element 3
rest A shorthand property for setting the rest-before and rest-after properties 3
rest-after Specifies a rest or prosodic boundary to be observed after speaking an element's content 3
rest-before Specifies a rest or prosodic boundary to be observed before speaking an element's content 3
voice-balance Specifies the balance between left and right channels 3
voice-duration Specifies how long it should take to render the selected element's content 3
voice-pitch Specifies the average pitch (a frequency) of the speaking voice 3
voice-pitch-range Specifies variation in average pitch 3
voice-rate Controls the speaking rate 3
voice-stress Indicates the strength of emphasis to be applied 3
voice-volume Refers to the amplitude of the waveform output by the speech synthesises 3

Marquee Properties

Property Description CSS
marquee-direction Sets the direction of the moving content 3
marquee-play-count Sets how many times the content move 3
marquee-speed Sets how fast the content scrolls 3
marquee-style Sets the style of the moving content 3

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