Version: 2023.1
USS transition
USS color keywords

USS properties reference

The following table lists the USS properties in UI Toolkit.

The table indicates which properties are inherited and their animatability. For an inherited property, the element gets the value from its parent element if you don’t specify a value for it. The following example uses an inherited property to set the font for all elements.

:root {
    -unity-font: resource("Font/consola.ttf");
}

Click the property name to see detailed information about that property.

Note: The usage of a USS property that’s the same as the CSS property links to the Mozilla developer documentation.

属性 Inherited Animatability 描述
align-content Discrete Alignment of the whole area of children on the cross axis if they span over multiple lines in this container.
align-items Discrete Alignment of children on the cross axis of this container.
align-self Discrete Similar to align-items, but only for this specific element.
all Fully animatable Allows resetting all properties with the initial keyword. Does not apply to custom USS properties.
background-color Fully animatable Background color to paint in the element’s box.
background-image Discrete Background image to paint in the element’s box.
background-position Fully animatable Background image position value.
background-position-x Discrete Background image x position value.
background-position-y Discrete Background image y position value.
background-repeat Discrete Background image repeat value.
background-size Fully animatable Background image size value.
border-bottom-color Fully animatable Color of the element’s bottom border.
border-bottom-left-radius Fully animatable The radius of the bottom-left corner when a rounded rectangle is drawn in the element’s box.
border-bottom-right-radius Fully animatable The radius of the bottom-right corner when a rounded rectangle is drawn in the element’s box.
border-bottom-width Fully animatable Space reserved for the bottom edge of the border during the layout phase.
border-color Fully animatable Shorthand for border-top-color, border-right-color, border-bottom-color, border-left-color
border-left-color Fully animatable Color of the element’s left border.
border-left-width Fully animatable Space reserved for the left edge of the border during the layout phase.
border-radius Fully animatable Shorthand for border-top-left-radius, border-top-right-radius, border-bottom-right-radius, border-bottom-left-radius
border-right-color Fully animatable Color of the element’s right border.
border-right-width Fully animatable Space reserved for the right edge of the border during the layout phase.
border-top-color Fully animatable Color of the element’s top border.
border-top-left-radius Fully animatable The radius of the top-left corner when a rounded rectangle is drawn in the element’s box.
border-top-right-radius Fully animatable The radius of the top-right corner when a rounded rectangle is drawn in the element’s box.
border-top-width Fully animatable Space reserved for the top edge of the border during the layout phase.
border-width Fully animatable Shorthand for border-top-width, border-right-width, border-bottom-width, border-left-width
bottom Fully animatable Bottom distance from the element’s box during layout.
color Fully animatable Color to use when drawing the text of an element.
cursor Non-animatable Mouse cursor to display when the mouse pointer is over an element.
display Discrete Defines how an element is displayed in the layout.
flex Fully animatable Shorthand for flex-grow, flex-shrink, flex-basis
flex-basis Fully animatable Initial main size of a flex item, on the main flex axis. The final layout might be smaller or larger, according to the flex shrinking and growing determined by the other flex properties.
flex-direction Discrete Direction of the main axis to layout children in a container.
flex-grow Fully animatable Specifies how the item will grow relative to the rest of the flexible items inside the same container.
flex-shrink Fully animatable Specifies how the item will shrink relative to the rest of the flexible items inside the same container.
flex-wrap Discrete Placement of children over multiple lines if not enough space is available in this container.
font-size Fully animatable Font size to draw the element’s text.
height Fully animatable Fixed height of an element for the layout.
justify-content Discrete Justification of children on the main axis of this container.
left Fully animatable Left distance from the element’s box during layout.
letter-spacing Fully animatable Increases or decreases the space between characters.
margin Fully animatable Shorthand for margin-top, margin-right, margin-bottom, margin-left
margin-bottom Fully animatable Space reserved for the bottom edge of the margin during the layout phase.
margin-left Fully animatable Space reserved for the left edge of the margin during the layout phase.
margin-right Fully animatable Space reserved for the right edge of the margin during the layout phase.
margin-top Fully animatable Space reserved for the top edge of the margin during the layout phase.
max-height Fully animatable Maximum height for an element, when it is flexible or measures its own size.
max-width Fully animatable Maximum width for an element, when it is flexible or measures its own size.
min-height Fully animatable Minimum height for an element, when it is flexible or measures its own size.
min-width Fully animatable Minimum width for an element, when it is flexible or measures its own size.
opacity Fully animatable Specifies the transparency of an element and of its children.
overflow Discrete How a container behaves if its content overflows its own box.
padding Fully animatable Shorthand for padding-top, padding-right, padding-bottom, padding-left
padding-bottom Fully animatable Space reserved for the bottom edge of the padding during the layout phase.
padding-left Fully animatable Space reserved for the left edge of the padding during the layout phase.
padding-right Fully animatable Space reserved for the right edge of the padding during the layout phase.
padding-top Fully animatable Space reserved for the top edge of the padding during the layout phase.
position Discrete Element’s positioning in its parent container.
right Fully animatable Right distance from the element’s box during layout.
rotate Fully animatable A rotation transformation.
scale Fully animatable A scaling transformation.
text-overflow Discrete The element’s text overflow mode.
text-shadow Fully animatable Drop shadow of the text.
top Fully animatable Top distance from the element’s box during layout.
transform-origin Fully animatable The transformation origin is the point around which a transformation is applied.
transition Non-animatable Shorthand for transition-delay, transition-duration, transition-property, transition-timing-function
transition-delay Non-animatable Duration to wait before starting a property’s transition effect when its value changes.
transition-duration Non-animatable Time a transition animation should take to complete.
transition-property Non-animatable Properties to which a transition effect should be applied.
transition-timing-function Non-animatable Determines how intermediate values are calculated for properties modified by a transition effect.
translate Fully animatable A translate transformation.
-unity-background-image-tint-color Fully animatable Tinting color for the element’s backgroundImage.
-unity-background-scale-mode Discrete Background image scaling in the element’s box.
-unity-font Discrete Font to draw the element’s text, defined as a Font object.
-unity-font-definition Discrete Font to draw the element’s text, defined as a FontDefinition structure. It takes precedence over -unity-font.
-unity-font-style Discrete Font style and weight (normal, bold, italic) to draw the element’s text.
-unity-overflow-clip-box Discrete Specifies which box the element content is clipped against.
-unity-paragraph-spacing Fully animatable Increases or decreases the space between paragraphs.
-unity-slice-bottom Fully animatable Size of the 9-slice’s bottom edge when painting an element’s background image.
-unity-slice-left Fully animatable Size of the 9-slice’s left edge when painting an element’s background image.
-unity-slice-right Fully animatable Size of the 9-slice’s right edge when painting an element’s background image.
-unity-slice-scale Fully animatable Scale applied to an element’s slices.
-unity-slice-top Fully animatable Size of the 9-slice’s top edge when painting an element’s background image.
-unity-text-align Discrete Horizontal and vertical text alignment in the element’s box.
-unity-text-outline Fully animatable Outline width and color of the text.
-unity-text-outline-color Fully animatable Outline color of the text.
-unity-text-outline-width Fully animatable Outline width of the text.
-unity-text-overflow-position Discrete The element’s text overflow position.
visibility Discrete Specifies whether or not an element is visible.
white-space Discrete Word wrap over multiple lines if not enough space is available to draw the text of an element.
width Fully animatable Fixed width of an element for the layout.
word-spacing Fully animatable Increases or decreases the space between words.
USS transition
USS color keywords