Revision 961863 of DOMHighResTimeStamp

<p>{{APIRef("High Resolution Time")}}</p>

<p>The <code><strong>DOMHighResTimeStamp</strong></code> type is a <code>double</code> and is used to store a time value. The value could be a discrete point in time or the difference in time between two discrete points in time. The unit is milliseconds and should be accurate to 5 µs (microseconds). However, If the browser is unable to provide a time value accurate to 5 microseconds (because, for example, due to hardware or software constraints), the browser can represent a the value as a time in milliseconds accurate to a millisecond.</p>

<div class="note">
<p>Implementations that cannot get the required precision (for example, if the underlying system doesn't support it) are allowed to only be accurate to one millisecond.</p>
</div>

<h2 id="Properties">Properties</h2>

<p><em>This <em>type</em> has no properties.</em></p>

<h2 id="Methods">Methods</h2>

<p><em>This <em>type</em> has no methods.</em></p>

<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('Highres Time Level 2', '#dom-domhighrestimestamp', 'DOMHighResTimeStamp')}}</td>
   <td>{{Spec2('Highres Time Level 2')}}</td>
   <td>Stricter definitions of interfaces and types.</td>
  </tr>
  <tr>
   <td>{{SpecName('Highres Time', '#sec-DOMHighResTimeStamp', 'DOMHighResTimeStamp')}}</td>
   <td>{{Spec2('Highres Time')}}</td>
   <td>Initial definition.</td>
  </tr>
 </tbody>
</table>

<h2 id="Browser_compatibility" name="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 (WebKit)</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>6</td>
   <td>{{CompatGeckoDesktop("7.0")}}</td>
   <td>9</td>
   <td>15.0</td>
   <td>8</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 Phone</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatGeckoMobile("15.0")}}</td>
   <td>9</td>
   <td>15.0</td>
   <td>9</td>
  </tr>
 </tbody>
</table>
</div>

<h2 id="See_also">See also</h2>

<ul>
 <li><a href="/en-US/docs/Navigation_timing" title="/en-US/docs/Navigation_timing">Navigation Timing API</a></li>
 <li><a href="/en-US/docs/Web/API/Performance/now">Performance.now()</a></li>
</ul>