Revision 1131039 of scaleY()

Revision slug: Web/CSS/transform-function/scaleY
Revision title: scaleY()
Revision id: 1131039
Created: Oct 17, 2016, 3:43:02 PM
Creator: Sebastianz
Is current revision? Yes
Comment Added 'CSS Function' tag

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Revision Content

The scaleY() CSS function modifies the ordinate of each element point by a constant factor except if this 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 not conserved.

scaleY(sy) is a shorthand for scale(1, sy) or for scale3d(1, sy, 1).

scaleY(-1) defines an axial symmetry with a horizontal axis passing by the origin (as specified by the transform-origin property).

Syntax

scaleY(s)

Values

s: Is a {{cssxref("<number>")}} representing the scaling factor to apply on the ordinate of each point of the element.

Cartesian coordinates on ℝ²	Homogeneous coordinates on ℝℙ²	Cartesian coordinates on ℝ³	Homogeneous coordinates on ℝℙ³
$(\begin{matrix} 1 & 0 \\ 0 & s \end{matrix})$	$(\begin{matrix} 1 & 0 & 0 \\ 0 & s & 0 \\ 0 & 0 & 1 \end{matrix})$	$(\begin{matrix} 1 & 0 & 0 \\ 0 & s & 0 \\ 0 & 0 & 1 \end{matrix})$	$(\begin{matrix} 1 & 0 & 0 & 0 \\ 0 & s & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{matrix})$
$(\begin{matrix} 1 & 0 \\ 0 & s \end{matrix})$	`[1 0 0 s 0 0]`

Examples

HTML

<p>foo</p>
<p class="transformed">bar</p>

CSS

p { 
  width: 50px;
  height: 50px;
  background-color: teal;
}

.transformed {
  transform: scaleY(2);
  background-color: blue;
}

Result

Revision Source

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

<p>The <code>scaleY()</code> CSS function modifies the ordinate 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/12119/scaleY.png" style="height:381px; width:365px" /></p>

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

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

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

<pre class="syntaxbox">
scaleY(s)
</pre>

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

<dl>
 <dt><em>s</em></dt>
 <dd>Is a {{cssxref("&lt;number&gt;")}}&nbsp;representing the scaling factor to apply on the ordinate 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>1<mtd>0</mtd></mtr> <mtr><mtd>0</mtd><mtd>s</mtd></mtr> </mtable> </mfenced> </math></td>
   <td><math> <mfenced><mtable><mtr>1<mtd>0</mtd><mtd>0</mtd></mtr><mtr>0<mtd>s</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>1<mtd>0</mtd><mtd>0</mtd></mtr><mtr>0<mtd>s</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>1<mtd>0</mtd><mtd>0</mtd><mtd>0</mtd></mtr><mtr>0<mtd>s</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>[1 0 0 s 0 0]</code></td>
  </tr>
 </tbody>
</table>

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

<h3 id="HTML">HTML</h3>

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

<h3 id="CSS">CSS</h3>

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

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

<h3 id="Result">Result</h3>

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

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