Revision 1131037 of scaleX()

<div>{{CSSRef}}</div>

<p>The <code>scaleX()</code> CSS function modifies the abscissa of each element point by a constant factor, except if this scale factor is <code>1</code>, in which case the function is the identity transform. The scaling is not isotropic and the angles of the element are not conserved.</p>

<p><img src="https://mdn.mozillademos.org/files/12117/scaleX.png" style="height:315px; width:372px" /></p>

<p><code>scaleX(sx)</code> is a shorthand for <code>scale(sx, 1)</code> or for <code>scale3d(sx, 1, 1)</code>.</p>

<p><code>scaleX(-1)</code> defines an <a class="external" href="https://en.wikipedia.org/wiki/Axial_symmetry">axial symmetry</a> with a vertical axis passing by the origin (as specified by the {{cssxref("transform-origin")}} property).</p>

<h2 id="Syntax">Syntax</h2>

<pre class="syntaxbox">
scaleX(<em>s</em>)
</pre>

<h2 id="Values">Values</h2>

<dl>
 <dt><em>s</em></dt>
 <dd>Is a {{cssxref("&lt;number&gt;")}} representing the scaling factor to apply on the abscissa of each point of the element.</dd>
</dl>

<table class="standard-table">
 <thead>
  <tr>
   <th scope="col">Cartesian coordinates on ℝ<sup>2</sup></th>
   <th scope="col">Homogeneous coordinates on ℝℙ<sup>2</sup></th>
   <th scope="col">Cartesian coordinates on ℝ<sup>3</sup></th>
   <th scope="col">Homogeneous coordinates on ℝℙ<sup>3</sup></th>
  </tr>
 </thead>
 <tbody>
  <tr>
   <td colspan="1" rowspan="2"><math> <mfenced> <mtable> <mtr><mtd>s</mtd><mtd>0</mtd></mtr> <mtr><mtd>0</mtd><mtd>1</mtd></mtr> </mtable> </mfenced> </math></td>
   <td><math> <mfenced><mtable><mtr>s<mtd>0</mtd><mtd>0</mtd></mtr><mtr>0<mtd>1</mtd><mtd>0</mtd></mtr><mtr><mtd>0</mtd><mtd>0</mtd><mtd>1</mtd></mtr></mtable> </mfenced> </math></td>
   <td colspan="1" rowspan="2"><math> <mfenced><mtable><mtr>s<mtd>0</mtd><mtd>0</mtd></mtr><mtr>0<mtd>1</mtd><mtd>0</mtd></mtr><mtr><mtd>0</mtd><mtd>0</mtd><mtd>1</mtd></mtr></mtable> </mfenced> </math></td>
   <td colspan="1" rowspan="2"><math> <mfenced><mtable><mtr>s<mtd>0</mtd><mtd>0</mtd><mtd>0</mtd></mtr><mtr>0<mtd>1</mtd><mtd>0</mtd><mtd>0</mtd></mtr><mtr><mtd>0</mtd><mtd>0</mtd><mtd>1</mtd><mtd>0</mtd></mtr><mtr><mtd>0</mtd><mtd>0</mtd><mtd>0</mtd><mtd>1</mtd></mtr></mtable> </mfenced> </math></td>
  </tr>
  <tr>
   <td><code>[s 0 0 1 0 0]</code></td>
  </tr>
 </tbody>
</table>

<h2 id="Examples">Examples</h2>

<h3 id="Without_changing_the_origin">Without changing the origin</h3>

<h4 id="HTML">HTML</h4>

<pre class="brush: html">
&lt;p&gt;foo&lt;/p&gt;
&lt;p class="transformed"&gt;bar&lt;/p&gt;</pre>

<h4 id="CSS">CSS</h4>

<pre class="brush: css">
p { 
  width: 50px;
  height: 50px;
  background-color: teal;
}

.transformed {
  transform: scaleX(2);
  background-color: blue;
}
</pre>

<h4 id="Result">Result</h4>

<p>{{EmbedLiveSample("Without_changing_the_origin","100%","200")}}</p>

<h3 id="Translating_the_origin_of_the_transformation">Translating the origin of the transformation</h3>

<h4 id="HTML_2">HTML</h4>

<pre class="brush: html">
&lt;p&gt;foo&lt;/p&gt;
&lt;p class="transformed"&gt;bar&lt;/p&gt;</pre>

<h4 id="CSS_2">CSS</h4>

<pre class="brush: css">
p { 
  width: 50px;
  height: 50px;
  background-color: teal;
}

.transformed {
  transform: scaleX(2);
  transform-origin: left;
  background-color: blue;
}
</pre>

<h4 id="Result_2">Result</h4>

<p>{{EmbedLiveSample("Translating_the_origin_of_the_transformation","100%","200")}}</p>