CSS Reference

Use this CSS reference to browse an alphabetical index of all of the standard CSS properties, pseudo-classes, pseudo-elements, data types, and at-rules. You can also browse key CSS concepts and a list of selectors organized by type. Also included is a brief DOM-CSS / CSSOM reference.


Table of Contents

align-contentSpecifies the alignment between the lines inside a flexible container when the items do not use all available space
align-itemsSpecifies the alignment for items inside a flexible container
align-selfSpecifies the alignment for selected items inside a flexible container
allResets all properties (except unicode-bidi and direction)
animationA shorthand property for all the animation-* properties
animation-delaySpecifies a delay for the start of an animation
animation-directionSpecifies whether an animation should be played forwards, backwards or
in alternate cycles
animation-durationSpecifies how long an animation should take to complete one cycle
animation-fill-modeSpecifies a style for the element when the animation is not playing (before
it starts, after it ends, or both)
animation-iteration-countSpecifies the number of times an animation should be played
animation-nameSpecifies a name for the @keyframes animation
animation-play-stateSpecifies whether the animation is running or paused
animation-timing-functionSpecifies the speed curve of an animation


backface-visibilityDefines whether or not the back face of an element should be visible when facing the user
backgroundA shorthand property for all the background-* properties
background-attachmentSets whether a background image scrolls with the rest of the page, or is fixed
background-blend-modeSpecifies the blending mode of each background layer (color/image)
background-clipDefines how far the background (color or image) should extend within an
background-colorSpecifies the background color of an element
background-imageSpecifies one or more background images for an element
background-originSpecifies the origin position of a background image
background-positionSpecifies the position of a background image
background-repeatSets if/how a background image will be repeated
background-sizeSpecifies the size of the background images
borderA shorthand property for border-width, border-style and border-color
border-bottomA shorthand property for border-bottom-width, border-bottom-style
and border-bottom-color
border-bottom-colorSets the color of the bottom border
border-bottom-left-radiusDefines the radius of the border of the bottom-left corner
border-bottom-right-radiusDefines the radius of the border of the bottom-right corner
border-bottom-styleSets the style of the bottom border
border-bottom-widthSets the width of the bottom border
border-collapseSets whether table borders should collapse into a single border or be separated
border-colorSets the color of the four borders
border-imageA shorthand property for all the border-image-* properties
border-image-outsetSpecifies the amount by which the border image area extends beyond the border box
border-image-repeatSpecifies whether the border image should be repeated, rounded or stretched
border-image-sliceSpecifies how to slice the border image
border-image-sourceSpecifies the path to the image to be used as a border
border-image-widthSpecifies the width of the border image
border-leftA shorthand property for all the border-left-* properties
border-left-colorSets the color of the left border
border-left-styleSets the style of the left border
border-left-widthSets the width of the left border
border-radiusA shorthand property for the four border-*-radius properties
border-rightA shorthand property for all the border-right-* properties
border-right-colorSets the color of the right border
border-right-styleSets the style of the right border
border-right-widthSets the width of the right border
border-spacingSets the distance between the borders of adjacent cells
border-styleSets the style of the four borders
border-topA shorthand property for border-top-width, border-top-style and
border-top-colorSets the color of the top border
border-top-left-radiusDefines the radius of the border of the top-left corner
border-top-right-radiusDefines the radius of the border of the top-right corner
border-top-styleSets the style of the top border
border-top-widthSets the width of the top border
border-widthSets the width of the four borders
bottomSets the elements position, from the bottom of its parent element
box-decoration-breakSets the behavior of the background and border of an element at page-break, or, for in-line elements, at line-break.
box-shadowAttaches one or more shadows to an element
box-sizingDefines how the width and height of an element are calculated: should
they include padding and borders, or not
break-afterSpecifies whether or not a page-, column-, or region-break should occur
after the specified element
break-beforeSpecifies whether or not a page-, column-, or region-break should occur
before the specified element
break-insideSpecifies whether or not a page-, column-, or region-break should occur
inside the specified element


caption-sideSpecifies the placement of a table caption
caret-colorSpecifies the color of the cursor (caret) in inputs, textareas, or any
element that is editable
@charsetSpecifies the character encoding used in the style sheet
clearSpecifies on which sides of an element floating elements are not allowed to float
clipClips an absolutely positioned element
colorSets the color of text
column-countSpecifies the number of columns an element should be divided into
column-fillSpecifies how to fill columns, balanced or not
column-gapSpecifies the gap between the columns
column-ruleA shorthand property for all the column-rule-* properties
column-rule-colorSpecifies the color of the rule between columns
column-rule-styleSpecifies the style of the rule between columns
column-rule-widthSpecifies the width of the rule between columns
column-spanSpecifies how many columns an element should span across
column-widthSpecifies the column width
columnsA shorthand property for column-width and column-count
contentUsed with the :before and :after pseudo-elements, to insert generated content
counter-incrementIncreases or decreases the value of one or more CSS counters
counter-resetCreates or resets one or more CSS counters
cursorSpecifies the mouse cursor to be displayed when pointing over an element


directionSpecifies the text direction/writing direction
displaySpecifies how a certain HTML element should be displayed


empty-cellsSpecifies whether or not to display borders and background on empty cells in a table


filterDefines effects (e.g. blurring or color shifting) on an element before the element is displayed
flexA shorthand property for the flex-grow, flex-shrink, and the
flex-basisSpecifies the initial length of a flexible item
flex-directionSpecifies the direction of the flexible items
flex-flowA shorthand property for the flex-direction and the flex-wrap properties
flex-growSpecifies how much the item will grow relative to the rest
flex-shrinkSpecifies how the item will shrink relative to the rest
flex-wrapSpecifies whether the flexible items should wrap or not
floatSpecifies whether or not a box should float
fontA shorthand property for the font-style, font-variant, font-weight,
, and the font-family properties
@font-faceA rule that allows websites to download and use fonts other than the “web-safe” fonts
font-familySpecifies the font family for text
font-feature-settingsAllows control over advanced typographic features in OpenType fonts
@font-feature-valuesAllows authors to use a common name in font-variant-alternate for feature activated differently in OpenType
font-kerningControls the usage of the kerning information (how letters are spaced)
font-language-overrideControls the usage of language-specific glyphs in a typeface
font-sizeSpecifies the font size of text
font-size-adjustPreserves the readability of text when font fallback occurs
font-stretchSelects a normal, condensed, or expanded face from a font family
font-styleSpecifies the font style for text
font-synthesisControls which missing typefaces (bold or italic) may be synthesized by the browser
font-variantSpecifies whether or not a text should be displayed in a small-caps font
font-variant-alternatesControls the usage of alternate glyphs associated to alternative names defined in @font-feature-values
font-variant-capsControls the usage of alternate glyphs for capital letters
font-variant-east-asianControls the usage of alternate glyphs for East Asian scripts (e.g Japanese and Chinese)
font-variant-ligaturesControls which ligatures and contextual forms are used in textual content of the elements it applies to
font-variant-numericControls the usage of alternate glyphs for numbers, fractions, and ordinal markers
font-variant-positionControls the usage of alternate glyphs of smaller size positioned as superscript or subscript regarding the baseline of the font
font-weightSpecifies the weight of a font


gridA shorthand property for the grid-template-rows,
grid-template-columns, grid-template-areas, grid-auto-rows,
, and the grid-auto-flow properties
grid-areaEither specifies a name for the grid item, or this property is a shorthand property for the grid-row-start, grid-column-start, grid-row-end, and grid-column-end properties
grid-auto-columnsSpecifies a default column size
grid-auto-flowSpecifies how auto-placed items are inserted in the grid
grid-auto-rowsSpecifies a default row size
grid-columnA shorthand property for the grid-column-start and the grid-column-end properties
grid-column-endSpecifies where to end the grid item
grid-column-gapSpecifies the size of the gap between columns
grid-column-startSpecifies where to start the grid item
grid-gapA shorthand property for the grid-row-gap and grid-column-gap properties
grid-rowA shorthand property for the grid-row-start and the grid-row-end properties
grid-row-endSpecifies where to end the grid item
grid-row-gapSpecifies the size of the gap between rows
grid-row-startSpecifies where to start the grid item
grid-templateA shorthand property for the grid-template-rows, grid-template-columns
and grid-areas properties
grid-template-areasSpecifies how to display columns and rows, using named grid items
grid-template-columnsSpecifies the size of the columns, and how many columns in a grid layout
grid-template-rowsSpecifies the size of the rows in a grid layout


hanging-punctuationSpecifies whether a punctuation character may be placed outside the line box
heightSets the height of an element
hyphensSets how to split words to improve the layout of paragraphs


image-renderingGives a hint to the browser about what aspects of an image are most important to preserve when the image is scaled
@importAllows you to import a style sheet into another style sheet
isolationDefines whether an element must create a new stacking content


justify-contentSpecifies the alignment between the items inside a flexible container when the items do not use all available space


@keyframesSpecifies the animation code


leftSpecifies the left position of a positioned element
letter-spacingIncreases or decreases the space between characters in a text
line-breakSpecifies how/if to break lines
line-heightSets the line height
list-styleSets all the properties for a list in one declaration
list-style-imageSpecifies an image as the list-item marker
list-style-positionSpecifies the position of the list-item markers (bullet points)
list-style-typeSpecifies the type of list-item marker


marginSets all the margin properties in one declaration
margin-bottomSets the bottom margin of an element
margin-leftSets the left margin of an element
margin-rightSets the right margin of an element
margin-topSets the top margin of an element
max-heightSets the maximum height of an element
max-widthSets the maximum width of an element
@mediaSets the style rules for different media types/devices/sizes
min-heightSets the minimum height of an element
min-widthSets the minimum width of an element
mix-blend-modeSpecifies how an element’s content should blend with its direct parent background


object-fitSpecifies how the contents of a replaced element should be fitted to the box established by its used height and width
object-positionSpecifies the alignment of the replaced element inside its box
opacitySets the opacity level for an element
orderSets the order of the flexible item, relative to the rest
orphansSets the minimum number of lines that must be left at the bottom of a page when a page break occurs inside an element
outlineA shorthand property for the outline-width, outline-style, and
the outline-color properties
outline-colorSets the color of an outline
outline-offsetOffsets an outline, and draws it beyond the border edge
outline-styleSets the style of an outline
outline-widthSets the width of an outline
overflowSpecifies what happens if content overflows an element’s box
overflow-wrapSpecifies 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)
overflow-xSpecifies whether or not to clip the left/right edges of the content, if it overflows the element’s content area
overflow-ySpecifies whether or not to clip the top/bottom edges of the content, if it overflows the element’s content area


paddingA shorthand property for all the padding-* properties
padding-bottomSets the bottom padding of an element
padding-leftSets the left padding of an element
padding-rightSets the right padding of an element
padding-topSets the top padding of an element
page-break-afterSets the page-break behavior after an element
page-break-beforeSets the page-break behavior before an element
page-break-insideSets the page-break behavior inside an element
perspectiveGives a 3D-positioned element some perspective
perspective-originDefines at which position the user is looking at the 3D-positioned element
pointer-eventsDefines whether or not an element reacts to pointer events
positionSpecifies the type of positioning method used for an element (static, relative, absolute or fixed)


quotesSets the type of quotation marks for embedded quotations


resizeDefines if (and how) an element is resizable by the user
rightSpecifies the right position of a positioned element


scroll-behaviorSpecifies whether to smoothly animate the scroll position in a scrollable box, instead of a straight jump


tab-sizeSpecifies the width of a tab character
table-layoutDefines the algorithm used to lay out table cells, rows, and columns
text-alignSpecifies the horizontal alignment of text
text-align-lastDescribes how the last line of a block or a line right before a forced line break is aligned when text-align is “justify”
text-combine-uprightSpecifies the combination of multiple characters into the space of a single character
text-decorationSpecifies the decoration added to text
text-decoration-colorSpecifies the color of the text-decoration
text-decoration-lineSpecifies the type of line in a text-decoration
text-decoration-styleSpecifies the style of the line in a text decoration
text-indentSpecifies the indentation of the first line in a text-block
text-justifySpecifies the justification method used when text-align is “justify”
text-orientationDefines the orientation of the text in a line
text-overflowSpecifies what should happen when text overflows the containing element
text-shadowAdds shadow to text
text-transformControls the capitalization of text
text-underline-positionSpecifies the position of the underline which is set using the text-decoration property
topSpecifies the top position of a positioned element
transformApplies a 2D or 3D transformation to an element
transform-originAllows you to change the position on transformed elements
transform-styleSpecifies how nested elements are rendered in 3D space
transitionA shorthand property for all the transition-* properties
transition-delaySpecifies when the transition effect will start
transition-durationSpecifies how many seconds or milliseconds a transition effect takes to complete
transition-propertySpecifies the name of the CSS property the transition effect is for
transition-timing-functionSpecifies the speed curve of the transition effect


unicode-bidiUsed together with the direction property to set or return whether the text should be overridden to support multiple languages in the same document
user-selectSpecifies whether the text of an element can be selected


vertical-alignSets the vertical alignment of an element
visibilitySpecifies whether or not an element is visible


white-spaceSpecifies how white-space inside an element is handled
widowsSets the minimum number of lines that must be left at the top of a page when a page break occurs inside an element
widthSets the width of an element
word-breakSpecifies how words should break when reaching the end of a line
word-spacingIncreases or decreases the space between words in a text
word-wrapAllows long, unbreakable words to be broken and wrap to the next line
writing-modeSpecifies whether lines of text are laid out horizontally or vertically


z-indexSets the stack order of a positioned element