css function

`scaleX()` CSS function

The scaleX() CSS function defines a transformation that resizes an element along the x-axis (horizontally). Its result is a <transform-function> data type.

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

transform: scaleX(1);

transform: scaleX(0.7);

transform: scaleX(1.3);

transform: scaleX(-0.5);

<section id="default-example">
  <img
    class="transition-all"
    id="example-element"
    src="/shared-assets/images/examples/firefox-logo.svg"
    width="200" />
</section>

It modifies the abscissa (horizontal, x-coordinate) of each element point by a constant factor, except when the scale factor is 1, in which case the function is the identity transform. The scaling is not isotropic, and the angles of the element are generally not conserved, except for multiples of 90 degrees. scaleX(-1) defines an axial symmetry, with a vertical axis passing through the origin (as specified by the transform-origin property).

[!NOTE] scaleX(sx) is equivalent to scale(sx, 1) or scale3d(sx, 1, 1).

Syntax

scaleX(s)

Values

s
- : Is a <number> representing the scaling factor to apply on the abscissa (horizontal, x-coordinate) of each point of the element.

Cartesian coordinates on ℝ^2	Homogeneous coordinates on ℝℙ^2	Cartesian coordinates on ℝ^3	Homogeneous coordinates on ℝℙ^3
$\left( \begin{array}{cc} s & 0 \\ 0 & 1 \end{array} \right)$	$\left( \begin{array}{ccc} s & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \end{array} \right)$	$\left( \begin{array}{ccc} s & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \end{array} \right)$	$\left( \begin{array}{cccc} s & 0 & 0 & 0 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{array} \right)$
	`[s 0 0 1 0 0]`

Formal syntax

Examples

HTML

<div>Normal</div>
<div class="scaled">Scaled</div>

CSS

div {
  width: 80px;
  height: 80px;
  background-color: skyblue;
}

.scaled {
  transform: scaleX(0.6);
  background-color: pink;
}

Result

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

Specifications

SpecificationsStandards references are available on the canonical MDN page.

Browser compatibility

Browser compatibilityCompatibility data is available on the canonical MDN page.