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diff --git a/files/es/web/api/window/domcontentloaded_event/index.html b/files/es/web/api/window/domcontentloaded_event/index.html new file mode 100644 index 0000000000..ffbf3accbc --- /dev/null +++ b/files/es/web/api/window/domcontentloaded_event/index.html @@ -0,0 +1,148 @@ +--- +title: DOMContentLoaded +slug: Web/Events/DOMContentLoaded +translation_of: Web/API/Window/DOMContentLoaded_event +--- +<p>El evento <code>DOMContentLoaded</code> es disparado cuando el documento HTML ha sido completamente cargado y parseado, sin esperar hojas de estilo, images y subframes para finalizar la carga. Un evento muy diferente - <a href="/en-US/docs/Mozilla_event_reference/load"><code>load</code></a> - debería ser usado solo para detectar una carga completa de la página. Es un error increíblemente popular usar <a href="/en-US/docs/Mozilla_event_reference/load"><code>load</code></a> cuando <code>DOMContentLoaded</code> sería mucho más apropiado, así que úsalo con cuidado.</p> + +<p>JavaScript síncrono pausa el parseo del DOM.</p> + +<p>También hay mucho propósito general y bibliotecas autónomas que ofrecen métodos de navegador cruzado para detectar que el DOM está preparado.</p> + +<h2 id="Speeding_up">Speeding up</h2> + +<p>If you want DOM to get parsed as fast as possible after the user had requested the page, some things you could do is turn your <a href="https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/Synchronous_and_Asynchronous_Requests">JavaScript asynchronous</a> and to <a href="https://developers.google.com/speed/docs/insights/OptimizeCSSDelivery">optimize loading of stylesheets</a> which if used as usual, slow down page load due to being loaded in parallel, "stealing" traffic from the main html document.</p> + +<h2 id="General_info">General info</h2> + +<dl> + <dt style="width: 120px; text-align: right; float: left;">Specification</dt> + <dd style="margin: 0px 0px 0px 120px;"><a class="external" href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-end.html#the-end">HTML5</a></dd> + <dt style="width: 120px; text-align: right; float: left;">Interface</dt> + <dd style="margin: 0px 0px 0px 120px;">Event</dd> + <dt style="width: 120px; text-align: right; float: left;">Bubbles</dt> + <dd style="margin: 0px 0px 0px 120px;">Yes</dd> + <dt style="width: 120px; text-align: right; float: left;">Cancelable</dt> + <dd style="margin: 0px 0px 0px 120px;">Yes (although specified as a simple event that isn't cancelable)</dd> + <dt style="width: 120px; text-align: right; float: left;">Target</dt> + <dd style="margin: 0px 0px 0px 120px;">Document</dd> + <dt style="width: 120px; text-align: right; float: left;">Default Action</dt> + <dd style="margin: 0px 0px 0px 120px;">None.</dd> +</dl> + +<h2 id="Properties">Properties</h2> + +<table class="standard-table"> + <thead> + <tr> + <th scope="col">Property</th> + <th scope="col">Type</th> + <th scope="col">Description</th> + </tr> + </thead> + <tbody> + <tr> + <td><code>target</code> {{readonlyInline}}</td> + <td>{{domxref("EventTarget")}}</td> + <td>The event target (the topmost target in the DOM tree).</td> + </tr> + <tr> + <td><code>type</code> {{readonlyInline}}</td> + <td>{{domxref("DOMString")}}</td> + <td>The type of event.</td> + </tr> + <tr> + <td><code>bubbles</code> {{readonlyInline}}</td> + <td>{{jsxref("Boolean")}}</td> + <td>Whether the event normally bubbles or not.</td> + </tr> + <tr> + <td><code>cancelable</code> {{readonlyInline}}</td> + <td>{{jsxref("Boolean")}}</td> + <td>Whether the event is cancellable or not.</td> + </tr> + </tbody> +</table> + +<h2 id="Example">Example</h2> + +<pre class="brush: html"><script> + document.addEventListener("DOMContentLoaded", function(event) { + console.log("DOM fully loaded and parsed"); + }); +</script> +</pre> + +<pre class="brush: html"><script> + document.addEventListener("DOMContentLoaded", function(event) { + console.log("DOM fully loaded and parsed"); + }); + +for(var i=0; i<1000000000; i++) +{} // this synchronous script is going to delay parsing of the DOM. So the DOMContentLoaded event is going to launch later. +</script> +</pre> + +<h2 id="Browser_compatibility">Browser compatibility</h2> + +<p>{{CompatibilityTable}}</p> + +<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>1.0<sup>[1]</sup></td> + <td>{{CompatGeckoDesktop("1")}}<sup>[1]</sup></td> + <td>9.0<sup>[2]</sup></td> + <td>9.0</td> + <td>3.1<sup>[1]</sup></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>{{CompatVersionUnknown}}<sup>[1]</sup></td> + <td>{{CompatGeckoMobile("1")}}<sup>[1]</sup></td> + <td>{{CompatUnknown}}<sup>[2]</sup></td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}<sup>[1]</sup></td> + </tr> + </tbody> +</table> +</div> + +<p>[1] Bubbling for this event is supported by at least Gecko 1.9.2, Chrome 6, and Safari 4.</p> + +<p>[2] Internet Explorer 8 supports the <code>readystatechange</code> event, which can be used to detect when the DOM is ready. In earlier versions of Internet Explorer, this state can be detected by repeatedly trying to execute <code>document.documentElement.doScroll("left");</code>, as this snippet will throw an error until the DOM is ready.</p> + +<h2 id="Related_Events">Related Events</h2> + +<ul> + <li>{{event("DOMContentLoaded")}}</li> + <li>{{event("readystatechange")}}</li> + <li>{{event("load")}}</li> + <li>{{event("beforeunload")}}</li> + <li>{{event("unload")}}</li> +</ul> |