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copied!<p>The <code>AjaxBehaviorEvent</code> doesn't contain any information about the JavaScript <code>event</code> object. You need to pass the desired information along yourself. This can be achieved by a hidden input field whose value is to be prefilled by JavaScript. For example,</p> <pre class="lang-html prettyprint-override"><code><h:inputText value="#{bean.input}" onkeyup="document.getElementById('#{keyCode.clientId}').value=event.keyCode"> <f:ajax event="keyup" execute="@this keyCode" listener="#{bean.listener}" /> </h:inputText> <h:inputHidden id="keyCode" binding="#{keyCode}" value="#{bean.keyCode}" /> </code></pre> <p><em>(please note that the <code>id</code> of the hidden field is included in <code>execute</code> so that it get submitted along on the ajax request, please also note that the <code>binding</code> is used to be able to dynamically obtain the generated client ID in <code>document.getElementById()</code> in order to set the key code value, you could alternatively also hardcode the client ID if it's fixed)</em></p> <p>with</p> <pre><code>private String input; private int keyCode; public void listener() { switch (keyCode) { case 13: // Enter key was pressed. break; case 27: // Escape key was pressed. break; default: // Other key was pressed. break; } } </code></pre> <p>You can find an overview of all valid <code>keyCode</code> values in the <a href="https://developer.mozilla.org/en/DOM/event/UIEvent/KeyEvent" rel="noreferrer">Mozilla DOM reference</a>.</p>

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