Revision 677971 of CanvasGradient

<div>
 {{APIRef("Canvas")}}</div>
<p>The <code><strong>CanvasGradient</strong></code> interface represents an opaque object describing a gradient. It is returned by the methods {{domxref("CanvasRenderingContext2D.createLinearGradient()")}} or {{domxref("CanvasRenderingContext2D.createRadialGradient()")}}.</p>
<h2 id="Properties">Properties</h2>
<p><em>Representing an opaque object, there is no exposed property.</em></p>
<h2 id="Methods">Methods</h2>
<p><em>There is no inherited method.</em></p>
<dl>
 <dt>
  {{domxref("CanvasGradient.addColorStop()")}}</dt>
 <dd>
  Adds a new stop, defined by an <code>offset</code> and a <code>color</code>, to the gradient. If the offset is not between <code>0</code> and <code>1</code> an <code>INDEX_SIZE_ERR</code> is raised, if the color can't be parsed as a CSS {{xref_csscolorvalue}}, a <code>SYNTAX_ERR</code> is raised.</dd>
</dl>
<h2 id="Specifications" name="Specifications">Specifications</h2>
<table class="standard-table">
 <thead>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
 </thead>
 <tbody>
  <tr>
   <td>{{SpecName('HTML WHATWG', "the-canvas-element.html#canvasgradient", "CanvasGradient")}}</td>
   <td>{{Spec2('HTML WHATWG')}}</td>
   <td>No change from {{Spec2('HTML Canvas 2D Context W3C')}}</td>
  </tr>
  <tr>
   <td>{{SpecName('HTML Canvas 2D Context W3C', '#canvasgradient', 'CanvasGradient')}}</td>
   <td>{{Spec2('HTML Canvas 2D Context W3C')}}</td>
   <td>Initial definition.</td>
  </tr>
 </tbody>
</table>
<h2 id="Browser_compatibility">Browser compatibility</h2>
<div>
 {{CompatibilityTable}}</div>
<div id="compat-desktop">
 <table class="compat-table">
  <tbody>
   <tr>
    <th>Feature</th>
    <th>Chrome</th>
    <th>Firefox (Gecko)</th>
    <th>Internet Explorer</th>
    <th>Opera</th>
    <th>Safari</th>
   </tr>
   <tr>
    <td>Basic support</td>
    <td>4.0</td>
    <td>{{CompatGeckoDesktop("3.6")}} [1]</td>
    <td>9.0</td>
    <td>9.0</td>
    <td>3.1</td>
   </tr>
  </tbody>
 </table>
</div>
<div id="compat-mobile">
 <table class="compat-table">
  <tbody>
   <tr>
    <th>Feature</th>
    <th>Android</th>
    <th>Firefox Mobile (Gecko)</th>
    <th>IE Mobile</th>
    <th>Opera Mobile</th>
    <th>Safari Mobile</th>
   </tr>
   <tr>
    <td>Basic support</td>
    <td>2.1</td>
    <td>{{CompatGeckoMobile("3.6")}} [1]</td>
    <td>{{CompatUnknown}}</td>
    <td>10.0</td>
    <td>3.2</td>
   </tr>
  </tbody>
 </table>
</div>
<p>[1] Before Gecko 5.0, {{geckoRelease("5.0")}}, specifying non-finite values when adding color stops through a call to <code>addColorStop()</code> incorrectly throws <code>SYNTAX_ERR</code> instead of <code>INDEX_SIZE_ERR</code>.</p>
<h2 id="See_also">See also</h2>
<ul>
 <li>Creator methods in {{domxref("CanvasRenderingContext2D")}}.</li>
 <li>The {{HTMLElement("canvas")}} element and its associated interface, {{domxref("HTMLCanvasElement")}}.</li>
</ul>