x CSS property

The x CSS property defines the x-axis coordinate of the top left corner of the SVG <rect> shape, <image> image, <foreignObject> viewport or nested <svg> viewport relative to the nearest <svg> ancestor's user coordinate system. If present, it overrides the element's x attribute.

Note: The x property only applies to <rect>, <image>, <foreignObject>, and <svg> elements nested in an <svg>. It has no effect on the outermost <svg> elements itself, and does not apply to other SVG elements nor to HTML elements or pseudo-elements.

Syntax

css
/* length and percentage values */
x: 40px;
x: 40%;

/* Global values */
x: inherit;
x: initial;
x: revert;
x: revert-layer;
x: unset;

Values

The <length> and <percentage> values denote the x-axis coordinate position of the top left corner of the SVG element container.

<length>

As an absolute or relative length, it can be expressed in any unit allowed by the CSS <length> data type.

<percentage>

Percentages refer to the width of the SVG viewBox, if declared, otherwise, the percentage refers to the width of the current SVG viewport.

Formal definition

Initial value0
Applies to<svg>, <rect>, <image>, and <foreignObject> elements in <svg>
Inheritedno
Percentagesrefer to the width of the current SVG viewport
Computed valuethe percentage as specified or the absolute length
Animation typeby computed value type

Formal syntax

x = 
  <length-percentage>  

<length-percentage> = 
  <length>      |
  <percentage>

Examples

undefined

Defining the x-axis coordinates of SVG shapes

This example demonstrates the basic use case of x, and how the CSS x property takes precedence over the x attribute.

HTML

We include four identical SVG <rect> elements; their x and y attributes values are all 10, meaning the four rectangles are all in the same location, 10px from the top and left corner of the SVG viewport.

html
<svg xmlns="http://www.w3.org/2000/svg">
  <rect width="100" height="100" x="10" y="10" />
  <rect width="100" height="100" x="10" y="10" />
  <rect width="100" height="100" x="10" y="10" />
  <rect width="100" height="100" x="10" y="10" />
</svg>

CSS

We style all the rectangles to have a black border and be slightly transparent, so overlapping rectangles are visible. We provide each rectangle with different fill and x values.

css
svg {
  border: 1px solid;
  width: 300px;
}

rect {
  fill: none;
  stroke: black;
  opacity: 0.8;
}

rect:nth-of-type(2) {
  x: 3em;
  fill: red;
}

rect:nth-of-type(3) {
  x: 180px;
  fill: yellow;
}

rect:nth-of-type(4) {
  x: 50%;
  fill: orange;
}

Results

The left edges of the rectangles are at 10 (from the attribute), 3em, 180px, and 50%, respectively. The SVG is 300px wide, so the last rectangle's left side is at the 150px mark.

Specifications

See also