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+---
+title: event.which
+slug: Web/API/KeyboardEvent/which
+tags:
+ - DOM
+ - events
+ - metodo
+ - which
+translation_of: Web/API/KeyboardEvent/which
+---
+<p>{{ ApiRef() }}</p>
+<h3 id="Summary" name="Summary">Resumen</h3>
+<p>Devuelve el <code>keyCode</code> de la tecla presionada, o el codigo del caracter (<code>charCode</code>) de la tecla alfanumerica presionada.</p>
+<h3 id="Syntax" name="Syntax">Sintaxis</h3>
+<pre class="eval"><em>var keyResult</em> = event.which;
+</pre>
+<p><code>keyResult</code> contiene el codigo numerico para una tecla en particular, dependiendo si la tecla presionada es alfanumerica o no-alfanumerica. Por favor mire <code><a href="/en/DOM/event.charCode" title="en/DOM/event.charCode">charCode</a></code> y <code><a href="/en/DOM/event.keyCode" title="en/DOM/event.keyCode">keyCode</a></code> para mas informacion.</p>
+<h3 id="Example" name="Example">Ejemplo</h3>
+<pre>&lt;html&gt;
+&lt;head&gt;
+&lt;title&gt;charCode/keyCode/which example&lt;/title&gt;
+
+&lt;script type="text/javascript"&gt;
+
+function showKeyPress(evt)
+{
+alert("onkeypress handler: \n"
+ + "keyCode property: " + evt.keyCode + "\n"
+ + "which property: " + evt.which + "\n"
+ + "charCode property: " + evt.charCode + "\n"
+ + "Character Key Pressed: "
+ + String.fromCharCode(evt.charCode) + "\n"
+ );
+}
+
+
+function keyDown(evt)
+{
+alert("onkeydown handler: \n"
+ + "keyCode property: " + evt.keyCode + "\n"
+ + "which property: " + evt.which + "\n"
+ );
+}
+
+
+&lt;/script&gt;
+&lt;/head&gt;
+
+&lt;body
+ onkeypress="showKeyPress(event);"
+ onkeydown="keyDown(event);"
+&gt;
+
+&lt;p&gt;Por favor presione cualquier tecla.&lt;/p&gt;
+
+&lt;/body&gt;
+&lt;/html&gt;
+</pre>
+<div class="note">
+ <strong>Nota:</strong> El codigo de arriba falla en Firefox 9 debido al <a class="link-https" href="https://bugzilla.mozilla.org/show_bug.cgi?id=696020" title="onkeypress attribute on body no longer gets events happening on the window">bug 696020</a>.</div>
+<h3 id="Specification" name="Specification">Especificacion</h3>
+<p>No es parte de ninguna especificacion.</p>