The box-align CSS property specifies how an element aligns its contents across its layout in a perpendicular direction. The effect of the property is only visible if there is extra space in the box.

Syntax: start | center | end | baseline | stretch

Initial value: stretch

The box-direction CSS property specifies whether a box lays out its contents normally (from the top or left edge), or in reverse (from the bottom or right edge).

Syntax: normal | reverse | inherit

Initial value: normal

The -moz-box-flex and -webkit-box-flex CSS properties specify how a -moz-box or -webkit-box grows to fill the box that contains it, in the direction of the containing box's layout.

Syntax: <number>

Initial value: 0

The box-flex-group CSS property assigns the flexbox's child elements to a flex group.

Syntax: <integer>

Initial value: 1

The box-lines CSS property determines whether the box may have a single or multiple lines (rows for horizontally oriented boxes, columns for vertically oriented boxes).

Syntax: single | multiple

Initial value: single

The box-ordinal-group CSS property assigns the flexbox's child elements to an ordinal group.

Syntax: <integer>

Initial value: 1

The box-orient CSS property sets whether an element lays out its contents horizontally or vertically.

Syntax: horizontal | vertical | inline-axis | block-axis | inherit

Initial value: inline-axis (horizontal in XUL)

The -moz-box-pack and -webkit-box-pack CSS properties specify how a -moz-box or -webkit-box packs its contents in the direction of its layout. The effect of this is only visible if there is extra space in the box.

Syntax: start | center | end | justify

Initial value: start

The clip CSS property defines a visible portion of an element. The clip property applies only to absolutely positioned elements — that is, elements with position:absolute or position:fixed.

Syntax: <shape> | auto

Initial value: auto

The font-variant-alternates CSS property controls the usage of alternate glyphs. These alternate glyphs may be referenced by alternative names defined in @font-feature-values.

Syntax: normal | [ stylistic( <feature-value-name> ) || historical-forms || styleset( <feature-value-name># ) || character-variant( <feature-value-name># ) || swash( <feature-value-name> ) || ornaments( <feature-value-name> ) || annotation( <feature-value-name> ) ]

Initial value: normal

The column-gap CSS property sets the size of the gap (gutter) between an element's columns.

Syntax: <length-percentage>

Initial value: 0

The gap CSS property sets the gaps (gutters) between rows and columns. It is a shorthand for row-gap and column-gap.

Syntax: <'grid-row-gap'> <'grid-column-gap'>?

The row-gap CSS property sets the size of the gap (gutter) between an element's grid rows.

Syntax: <length-percentage>

Initial value: 0

The ime-mode CSS property controls the state of the input method editor (IME) for text fields. This property is obsolete.

Syntax: auto | normal | active | inactive | disabled

Initial value: auto

The inset-block CSS property defines the logical block start and end offsets of an element, which maps to physical offsets depending on the element's writing mode, directionality, and text orientation. It corresponds to the top and bottom, or right and left properties depending on the values defined for writing-mode, direction, and text-orientation.

Syntax: <'top'>{1,2}

Initial value: auto

The inset-block-end CSS property defines the logical block end offset of an element, which maps to a physical inset depending on the element's writing mode, directionality, and text orientation. It corresponds to the top, right, bottom, or left property depending on the values defined for writing-mode, direction, and text-orientation.

Syntax: <'top'>

Initial value: auto

The inset-block-start CSS property defines the logical block start offset of an element, which maps to a physical inset depending on the element's writing mode, directionality, and text orientation. It corresponds to the top, right, bottom, or left property depending on the values defined for writing-mode, direction, and text-orientation.

Syntax: <'top'>

Initial value: auto

The inset-inline CSS property defines the logical start and end offsets of an element in the inline direction, which maps to physical offsets depending on the element's writing mode, directionality, and text orientation. It corresponds to the top and bottom, or right and left properties depending on the values defined for writing-mode, direction, and text-orientation.

Syntax: <'top'>{1,2}

Initial value: auto

The inset-inline-end CSS property defines the logical inline end inset of an element, which maps to a physical inset depending on the element's writing mode, directionality, and text orientation. It corresponds to the top, right, bottom, or left property depending on the values defined for writing-mode, direction, and text-orientation.

Syntax: <'top'>

Initial value: auto

The inset-inline-start CSS property defines the logical inline start inset of an element, which maps to a physical offset depending on the element's writing mode, directionality, and text orientation. It corresponds to the top, right, bottom, or left property depending on the values defined for writing-mode, direction, and text-orientation.

Syntax: <'top'>

Initial value: auto

The scroll-snap-coordinate CSS property defines the x and y coordinate positions within an element that will align with its nearest ancestor scroll container's scroll-snap-destination for each respective axis.

Syntax: none | <position>#

Initial value: none

The scroll-snap-destination CSS property defines the position in x and y coordinates within the scroll container's visual viewport which element snap points align with.

Syntax: <position>

Initial value: 0px 0px

The scroll-snap-points-x CSS property defines the horizontal positioning of snap points within the content of the scroll container they are applied to.

Syntax: none | repeat( <length-percentage> )

Initial value: none

The scroll-snap-points-y CSS property defines the vertical positioning of snap points within the content of the scroll container they are applied to.

Syntax: none | repeat( <length-percentage> )

Initial value: none

The scroll-snap-type-x CSS property defines how strictly snap points are enforced on the horizontal axis of the scroll container in case there is one.

Syntax: none | mandatory | proximity

Initial value: none

The scroll-snap-type-y CSS property defines how strictly snap points are enforced on the vertical axis of the scroll container in case there is one.

Syntax: none | mandatory | proximity

Initial value: none

The -ms-scrollbar-track-color CSS property is a Microsoft extension that specifies the color of the track element of a scrollbar.

Syntax: <color>

Initial value: Scrollbar

The text-combine-upright CSS property sets the combination of characters into the space of a single character. If the combined text is wider than 1em, the user agent must fit the contents within 1em. The resulting composition is treated as a single upright glyph for layout and decoration. This property only has an effect in vertical writing modes.

Syntax: none | all | [ digits <integer>? ]

Initial value: none

The box-align CSS property specifies how an element aligns its contents across its layout in a perpendicular direction. The effect of the property is only visible if there is extra space in the box.

Syntax: start | center | end | baseline | stretch

Initial value: stretch

The box-direction CSS property specifies whether a box lays out its contents normally (from the top or left edge), or in reverse (from the bottom or right edge).

Syntax: normal | reverse | inherit

Initial value: normal

The -moz-box-flex and -webkit-box-flex CSS properties specify how a -moz-box or -webkit-box grows to fill the box that contains it, in the direction of the containing box's layout.

Syntax: <number>

Initial value: 0

The box-flex-group CSS property assigns the flexbox's child elements to a flex group.

Syntax: <integer>

Initial value: 1

The box-lines CSS property determines whether the box may have a single or multiple lines (rows for horizontally oriented boxes, columns for vertically oriented boxes).

Syntax: single | multiple

Initial value: single

The box-ordinal-group CSS property assigns the flexbox's child elements to an ordinal group.

Syntax: <integer>

Initial value: 1

The box-orient CSS property sets whether an element lays out its contents horizontally or vertically.

Syntax: horizontal | vertical | inline-axis | block-axis | inherit

Initial value: inline-axis (horizontal in XUL)

The -moz-box-pack and -webkit-box-pack CSS properties specify how a -moz-box or -webkit-box packs its contents in the direction of its layout. The effect of this is only visible if there is extra space in the box.

Syntax: start | center | end | justify

Initial value: start

The line-break CSS property sets how to break lines of Chinese, Japanese, or Korean (CJK) text when working with punctuation and symbols.

Syntax: auto | loose | normal | strict | anywhere

Initial value: auto

The opacity CSS property sets the opacity of an element. Opacity is the degree to which content behind an element is hidden, and is the opposite of transparency.

Syntax: <alpha-value>

Initial value: 1.0

The **user-select** CSS property controls whether the user can select text. This doesn't have any effect on content loaded as chrome, except in textboxes.

Syntax: auto | text | none | contain | all

Initial value: auto

The background-clip CSS property sets whether an element's background extends underneath its border box, padding box, or content box.

Syntax: <box>#

Initial value: border-box

The box-decoration-break CSS property specifies how an element's fragments should be rendered when broken across multiple lines, columns, or pages.

Syntax: slice | clone

Initial value: slice

The background-origin CSS property sets the background's origin: from the border start, inside the border, or inside the padding.

Syntax: <box>#

Initial value: padding-box

The background-size CSS property sets the size of the element's background image. The image can be left to its natural size, stretched, or constrained to fit the available space.

Syntax: <bg-size>#

Initial value: auto auto

The -moz-binding CSS property is used by Mozilla-based applications to attach an XBL binding to a DOM element.

Syntax: <url> | none

Initial value: none

The border-radius CSS property rounds the corners of an element's outer border edge. You can set a single radius to make circular corners, or two radii to make elliptical corners.

Syntax: <length-percentage>{1,4} [ / <length-percentage>{1,4} ]?

The border-bottom-left-radius CSS property rounds the bottom-left corner of an element by specifying the radius (or the radius of the semi-major and semi-minor axes) of the ellipse defining the curvature of the corner.

Syntax: <length-percentage>{1,2}

Initial value: 0

The border-bottom-right-radius CSS property rounds the top-left corner of an element by specifying the radius (or the radius of the semi-major and semi-minor axes) of the ellipse defining the curvature of the corner.

Syntax: <length-percentage>{1,2}

Initial value: 0

The border-top-left-radius CSS property rounds the top-left corner of an element by specifying the radius (or the radius of the semi-major and semi-minor axes) of the ellipse defining the curvature of the corner.

Syntax: <length-percentage>{1,2}

Initial value: 0

The border-top-right-radius CSS property rounds the top-right corner of an element by specifying the radius (or the radius of the semi-major and semi-minor axes) of the ellipse defining the curvature of the corner.

Syntax: <length-percentage>{1,2}

Initial value: 0

The box-align CSS property specifies how an element aligns its contents across its layout in a perpendicular direction. The effect of the property is only visible if there is extra space in the box.

Syntax: start | center | end | baseline | stretch

Initial value: stretch

The box-direction CSS property specifies whether a box lays out its contents normally (from the top or left edge), or in reverse (from the bottom or right edge).

Syntax: normal | reverse | inherit

Initial value: normal

The -moz-box-flex and -webkit-box-flex CSS properties specify how a -moz-box or -webkit-box grows to fill the box that contains it, in the direction of the containing box's layout.

Syntax: <number>

Initial value: 0

The box-ordinal-group CSS property assigns the flexbox's child elements to an ordinal group.

Syntax: <integer>

Initial value: 1

The box-orient CSS property sets whether an element lays out its contents horizontally or vertically.

Syntax: horizontal | vertical | inline-axis | block-axis | inherit

Initial value: inline-axis (horizontal in XUL)

The -moz-box-pack and -webkit-box-pack CSS properties specify how a -moz-box or -webkit-box packs its contents in the direction of its layout. The effect of this is only visible if there is extra space in the box.

Syntax: start | center | end | justify

Initial value: start

The box-shadow CSS property adds shadow effects around an element's frame. You can set multiple effects separated by commas. A box shadow is described by X and Y offsets relative to the element, blur and spread radius, and color.

Syntax: none | <shadow>#

Initial value: none

The non-standard -moz-float-edge CSS property specifies whether the height and width properties of the element include the margin, border, or padding thickness.

Syntax: border-box | content-box | margin-box | padding-box

Initial value: content-box

The -moz-force-broken-image-icon extended CSS property can be used to force the broken image icon to be shown even when a broken image has an alt attribute.

Syntax: <integer>

Initial value: 0

The opacity CSS property sets the opacity of an element. Opacity is the degree to which content behind an element is hidden, and is the opposite of transparency.

Syntax: <alpha-value>

Initial value: 1.0

The outline CSS shorthand property set all the outline properties in a single declaration.

Syntax: [ <'outline-color'> || <'outline-style'> || <'outline-width'> ]

The outline-color CSS property sets the color of an element's outline.

Syntax: <color> | invert

Initial value: invert, for browsers supporting it, currentColor for the other

In Mozilla applications like Firefox, the -moz-outline-radius CSS shorthand property can be used to give an element's outline rounded corners.

Syntax: <outline-radius>{1,4} [ / <outline-radius>{1,4} ]?

In Mozilla applications, the -moz-outline-radius-bottomleft CSS property can be used to round the bottom-left corner of an element's outline.

Syntax: <outline-radius>

Initial value: 0

In Mozilla applications, the -moz-outline-radius-bottomright CSS property can be used to round the bottom-right corner of an element's outline.

Syntax: <outline-radius>

Initial value: 0

In Mozilla applications, the -moz-outline-radius-topleft CSS property can be used to round the top-left corner of an element's outline.

Syntax: <outline-radius>

Initial value: 0

In Mozilla applications, the -moz-outline-radius-topright CSS property can be used to round the top-right corner of an element's outline.

Syntax: <outline-radius>

Initial value: 0

The outline-style CSS property sets the style of an element's outline. An outline is a line that is drawn around an element, outside the border.

Syntax: auto | <'border-style'>

Initial value: none

The CSS outline-width property sets the thickness of an element's outline. An outline is a line that is drawn around an element, outside the border.

Syntax: <line-width>

Initial value: medium

The text-align-last CSS property sets how the last line of a block or a line, right before a forced line break, is aligned.

Syntax: auto | start | end | left | right | center | justify

Initial value: auto

The text-decoration-color CSS property sets the color of decorations added to text by text-decoration-line.

Syntax: <color>

Initial value: currentcolor

The text-decoration-line CSS property sets the kind of decoration that is used on text in an element, such as an underline or overline.

Syntax: none | [ underline || overline || line-through || blink ] | spelling-error | grammar-error

Initial value: none

The text-decoration-style CSS property sets the style of the lines specified by text-decoration-line. The style applies to all lines that are set with text-decoration-line.

Syntax: solid | double | dotted | dashed | wavy

Initial value: solid

In Mozilla applications, -moz-user-input determines if an element will accept user input.

Syntax: auto | none | enabled | disabled

Initial value: auto

The ime-mode CSS property controls the state of the input method editor (IME) for text fields. This property is obsolete.

Syntax: auto | normal | active | inactive | disabled

Initial value: auto

The -ms-scrollbar-track-color CSS property is a Microsoft extension that specifies the color of the track element of a scrollbar.

Syntax: <color>

Initial value: Scrollbar

The animation shorthand CSS property applies an animation between styles. It is a shorthand for animation-name, animation-duration, animation-timing-function, animation-delay, animation-iteration-count, animation-direction, animation-fill-mode, and animation-play-state.

Syntax: <single-animation>#

The animation-delay CSS property specifies the amount of time to wait from applying the animation to an element before beginning to perform the animation. The animation can start later, immediately from its beginning, or immediately and partway through the animation.

Syntax: <time>#

Initial value: 0s

The animation-direction CSS property sets whether an animation should play forward, backward, or alternate back and forth between playing the sequence forward and backward.

Syntax: <single-animation-direction>#

Initial value: normal

The animation-duration CSS property sets the length of time that an animation takes to complete one cycle.

Syntax: <time>#

Initial value: 0s

The animation-fill-mode CSS property sets how a CSS animation applies styles to its target before and after its execution.

Syntax: <single-animation-fill-mode>#

Initial value: none

The animation-iteration-count CSS property sets the number of times an animation sequence should be played before stopping.

Syntax: <single-animation-iteration-count>#

Initial value: 1

The animation-name CSS property specifies the names of one or more @keyframes at-rules describing the animation or animations to apply to the element.

Syntax: [ none | <keyframes-name> ]#

Initial value: none

The animation-play-state CSS property sets whether an animation is running or paused.

Syntax: <single-animation-play-state>#

Initial value: running

The animation-timing-function CSS property sets how an animation progresses through the duration of each cycle.

Syntax: <timing-function>#

Initial value: ease

The background-size CSS property sets the size of the element's background image. The image can be left to its natural size, stretched, or constrained to fit the available space.

Syntax: <bg-size>#

Initial value: auto auto

The border-image CSS property draws an image around a given element. It replaces the element's regular border.

Syntax: <'border-image-source'> || <'border-image-slice'> [ / <'border-image-width'> | / <'border-image-width'>? / <'border-image-outset'> ]? || <'border-image-repeat'>

The transform CSS property lets you rotate, scale, skew, or translate an element. It modifies the coordinate space of the CSS visual formatting model.

Syntax: none | <transform-list>

Initial value: none

The transition CSS property is a shorthand property for transition-property, transition-duration, transition-timing-function, and transition-delay.

Syntax: <single-transition>#

The transition-delay CSS property specifies the duration to wait before starting a property's transition effect when its value changes.

Syntax: <time>#

Initial value: 0s

The transition-duration CSS property sets the length of time a transition animation should take to complete. By default, the value is 0s, meaning that no animation will occur.

Syntax: <time>#

Initial value: 0s

The transition-property CSS property sets the CSS properties to which a transition effect should be applied.

Syntax: none | <single-transition-property>#

Initial value: all

The transition-timing-function CSS property sets how intermediate values are calculated for CSS properties being affected by a transition effect.

Syntax: <timing-function>#

Initial value: ease

The box-align CSS property specifies how an element aligns its contents across its layout in a perpendicular direction. The effect of the property is only visible if there is extra space in the box.

Syntax: start | center | end | baseline | stretch

Initial value: stretch

The box-direction CSS property specifies whether a box lays out its contents normally (from the top or left edge), or in reverse (from the bottom or right edge).

Syntax: normal | reverse | inherit

Initial value: normal

The -moz-box-flex and -webkit-box-flex CSS properties specify how a -moz-box or -webkit-box grows to fill the box that contains it, in the direction of the containing box's layout.

Syntax: <number>

Initial value: 0

The box-flex-group CSS property assigns the flexbox's child elements to a flex group.

Syntax: <integer>

Initial value: 1

The box-lines CSS property determines whether the box may have a single or multiple lines (rows for horizontally oriented boxes, columns for vertically oriented boxes).

Syntax: single | multiple

Initial value: single

The box-ordinal-group CSS property assigns the flexbox's child elements to an ordinal group.

Syntax: <integer>

Initial value: 1

The box-orient CSS property sets whether an element lays out its contents horizontally or vertically.

Syntax: horizontal | vertical | inline-axis | block-axis | inherit

Initial value: inline-axis (horizontal in XUL)

The -moz-box-pack and -webkit-box-pack CSS properties specify how a -moz-box or -webkit-box packs its contents in the direction of its layout. The effect of this is only visible if there is extra space in the box.

Syntax: start | center | end | justify

Initial value: start

The scroll-snap-points-x CSS property defines the horizontal positioning of snap points within the content of the scroll container they are applied to.

Syntax: none | repeat( <length-percentage> )

Initial value: none

The scroll-snap-points-y CSS property defines the vertical positioning of snap points within the content of the scroll container they are applied to.

Syntax: none | repeat( <length-percentage> )

Initial value: none