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css property

`x` CSS property

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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

/* 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 &lt;length&gt; 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

Formal syntax

Examples

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.

<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.

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

Interactive exampleOpen the canonical MDN source to run this embedded demo.

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

SpecificationsStandards references are available on the canonical MDN page.

Browser compatibility

Browser compatibilityCompatibility data is available on the canonical MDN page.

See also