api.jquery.com/entries/error.xml at e5f5d6ca8f216a037bb9896fa01d8eb766ebf6ec · jquery/api.jquery.com · GitHub

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<?xml version="1.0"?>
<entry type="method" name="error" return="jQuery" deprecated="1.8" removed="3.0">
  <title>.error()</title>
  <desc>Bind an event handler to the "error" JavaScript event.</desc>
  <signature>
    <added>1.0</added>
    <argument name="handler" type="Function">
      <desc>A function to execute when the event is triggered.</desc>
      <argument name="eventObject" type="Event" />
    </argument>
  </signature>
  <signature>
    <added>1.4.3</added>
    <argument name="eventData" type="Anything" optional="true">
      <desc>An object containing data that will be passed to the event handler.</desc>
    </argument>
    <argument name="handler" type="Function">
      <desc>A function to execute each time the event is triggered.</desc>
      <argument name="eventObject" type="Event" />
    </argument>
  </signature>
  <longdesc>
    <div class="warning">
      <p>Note: This API has been removed in jQuery 3.0; please use <code>.on( "error", handler )</code> instead of <code>.error( handler )</code> and <code>.trigger( "error" )</code> instead of <code>.error()</code>.</p>
    </div>
    <p>The <code>error</code> event is sent to elements, such as images, that are referenced by a document and loaded by the browser. It is called if the element was not loaded correctly.</p>
    <p>For example, consider a page with a simple image element:</p>
    <pre><code>
&lt;img alt="Book" id="book"&gt;
    </code></pre>
    <p>The event handler can be bound to the image:</p>
    <pre><code>
$( "#book" )
  .error(function() {
    alert( "Handler for .error() called." )
  })
  .attr( "src", "missing.png" );
    </code></pre>
    <p>If the image cannot be loaded (for example, because it is not present at the supplied URL), the alert is displayed:</p>
    <p>
      <samp>Handler for .error() called.</samp>
    </p>
    <div class="warning">
      <p>The event handler <em>must</em> be attached before the browser fires the <code>error</code> event, which is why the example sets the <code>src</code> attribute after attaching the handler. Also, the <code>error</code> event may not be correctly fired when the page is served locally; <code>error</code> relies on HTTP status codes and will generally not be triggered if the URL uses the <code>file:</code> protocol.</p>
    </div>
    <p>Note: A jQuery <code>error</code> event handler should not be attached to the <code>window</code> object. The browser fires the <code>window</code>'s <code>error</code> event when a script error occurs. However, the window <code>error</code> event receives different arguments and has different return value requirements than conventional event handlers. Use <code>window.onerror</code> instead.</p>
  </longdesc>
  <note id="detach-shorthand" type="additional" data-event="error"/>
  <example>
    <desc>To replace all the missing images with another, you can update the <code>src</code> attribute inside the callback passed to <code>.error()</code>. Be sure that the replacement image exists; otherwise the <code>error</code> event will be triggered indefinitely.</desc>
    <code><![CDATA[
// If missing.png is missing, it is replaced by replacement.png
$( "img" )
  .error(function() {
    $( this ).attr( "src", "replacement.png" );
  })
  .attr( "src", "missing.png" );
]]></code>
  </example>
  <category slug="events/browser-events"/>
  <category slug="version/1.0"/>
  <category slug="version/1.4.3"/>
  <category slug="deprecated/deprecated-1.8"/>
  <category slug="removed"/>
</entry>